Heat Pumps: the Future of Home Heating
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- Опубліковано 27 лют 2021
- It's so cold that it's hot.
Hey! So there have been a LOT of developments in the air-source heat pump space. A replacement for Part 2 is now live:
• Why Heat Pumps are Imm...
I referenced a lot of old videos in this one. Here they are, in clickity linkity form!
Chest Freezers; What they tell us about designing for X
• Chest Freezers; What t...
Old-fashioned rice cookers are extremely clever
• Old-fashioned rice coo...
Reusable handwarmers that get hot by freezing
• Reusable handwarmers t...
I also made passing references to
Forced-air Furnaces: The What, Why, and How
• Forced-air Furnaces: T...
and
Portable Air Conditioners - Why you shouldn't like them
• Portable Air Condition...
If you'd like to learn about Ground Source (Geothermal) heat pumps, you can check out this video • Ground Source / Geothe...
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Hello! Here's a comment with some extra info on efficiency and the metering devices used in heat pumps.
First: my wording on the efficiency drop in the cold was sloppy, and it sounds like I'm suggesting the need for defrosting is the only reason it loses efficiency. It is _a_ reason, but not the biggest one - that's simply that as the outdoor temperature gets colder, it's harder for the refrigerant to absorb heat because the temperature difference between it and the air gets smaller. In fact, in the clip when it was -10°, it wasn't building much frost at all because it was very dry. But that was so cold that the refrigerant could barely capture any energy, which is why its output was tepid. And to be clear, its rating down to 5° doesn't mean it operates at full efficiency at that temperature. That's just the lowest temperature that it can sustain its rated heating output.
Re: metering devices. I still somewhat suspect that the mini-split has a capillary tube and largely because of its cost. It was surprisingly inexpensive (this unit was about $1000, but the smallest units from this same manufacture only cost $750 and are fully capable heat pumps). If you use a thermal expansion valve or similar, you need one for each direction which adds to the system's complexity somewhat. I'd still argue that it hardly does - it is, after all, one or two small components of a large system. But simply reversing the refrigerant flow doesn't work on its own in systems that use these more complex metering devices. They'd need some additional piping and valve work (some such valves were visible in the demo rig) to accommodate two metering devices for each direction of flow.
:)
second one to reply! :)
Amazing video I was really anticipating this one, AND A CONNEXTRAS EPILOG, lovely
Heaters = inefficient
Most have EEV’s or electronic expansion valves. Only one valve is required in the outdoor unit this is why the small line needs to be insulated. As in cooling mode the small line is now a low pressure liquid line.
If it's not absolute zero there's some energy. Let's steal it!
If efficiency is not 100%, make it
e
even if it is a completely empty vacuum there is still some energy
@@inactiveytchannel the second law of thermodynamics states that mechanical devices cannot be 100% efficient
NO ONE WILL EVER KNOW!
my mother: shut the door, we ain't paying to air condition the entire neighborhood
alec: ... what if you were
Lmao
I was at a friends house once in the winter and her mother came in and yelled at us for having the door open. She said, 'I'm not heating up the whole neighboorhood, here!' I looked at her and replied, 'Not in that bathrobe, you aren't...' I didn't know someone could throw a wooden spoon that hard.
Hey Vsauce, Alec here
Excellent comment, so much creativity and memery in UA-cam comments sometimes, finding the best ones always makes me smile
@@MrGothicruler666 I totally read the og comments in vsauce fashion. Hearing the music in the background after I read it.
This video ended up inspiring me to go into an HVAC career, I just got hired as an apprentice :) thanks for the great content!
It's a great career, just don't believe the heat pump b/s.
How ya liking it my man?
@@mrofnocnonnever seen anyone get through a winter with just their heat pump. They always gotta kick the heat strips in their air handler on or they have a dual fuel gas furnace/ heat pump combo.
@@June-xm4efAs a HVAC tech in Canada I've never seen it either. Will people realize?
@@mrofnocnonexactly what I was gonna say lol
HVAC tech from the EU here, I'm probably late to the party on this but just wanted to add, most mini splits with variable frequency compressors don't use capillary tubes or TXVs but electronic expansion valves for even more adjustability and efficiency and they're usually in the outdoor unit and not the indoor one which is why insulation of the copper piping from outside to inside is so important as well. Anyway, love your content, keep doing what you're doing!
When your entire upload history is a prequel series for a single video.
Haha! Everytime the links popped up, I thought, "I'm glad I already watched those, it has all led to this!"
Technology Connections Cinematic Universe
I love pumps!
The greatest feeling you can get in a gym or the most satisfying feeling you can get in the gym is *_the pump._*
Let's say you train your biceps, blood is rushing in to your muscles and that's what we call *the pump.* Your muscles get a really tight feeling like your skin is going to explode any minute and its really tight and its like someone is blowing air into your muscle and it just blows up and it feels different, it feels fantastic. It's as satisfying to me as cumming is, you know, as in having sex with a woman and cumming.
So can you believe how much I am in heaven? I'm like... _getting the feeling of cumming in the gym; I'm getting the feeling of _*_cumming at home;_*_ I'm getting the feeling of _*_cumming backstage;_*_ when I pump up, when I pose out in front of 5000 people I get the same feeling, so _*_I am cumming day and night._*
It's terrific, right? So you know... I'm in heaven.
@@kalibos Yep, this is his Infinity War.
Walnuts and Bestiality, is this the new and best copy pasta?
This video is the linchpin of the Technology Connections Cinematic Universe
Alec is a smarter character than we've had before, if we can get him working...
He really made the "Connections" part pull its weight in this episode!
Yep. It's all heat pumps. Always has been.
Phase change was a surprise tool that will help us later.
If only we could connect Teletext and refrigeration cycles somehow.
Fun to watch. I live in Sweden and close to 60 percent of all Swedish detached houses have a heat pump. The number of houses with heat pumps has also increased by almost 50 percent since 2009.
I live in Sweden too, i lived in an old apartment complex with direct heating. I literally bought a house in order to survive this winter, heat pumps truly are a blessing!
Don't hesitate to switch on your heat pump at full power during the daytime. It's much easier for your device to 'pump' the calories when the sun is still shining. I live at high altitude and I stop my heatpump in the late afternoon when it's getting very cold and switch to wood during the night
@@balokurd17, Yes I agree that running the heat pump during the day is much more heat per hour and a little more heat per KW of power used. I have a thermometer on my hot gas line going into my indoor unit. At 47F yesterday the temperature was 147, while this morning at 29F outside, the temperature was only 117F.
So setting the temperature a little warmer during the day will save electricity overall.
Stay tuned! Some "Nordic weather certified" multi split heat pumps are available soon in those countries.
I thought it was fun too. My sister lives in England and for them this is something new....
My previous heat pump was installed by my father, some 30 years ago. I replaced it a couple of years ago (same brand - Toshiba).
I have a separate meter on it so I can see exactly how much electricity it draws. 272KWh is the maximum I've managed a month, and that would be during winter with cold spells below -20°C.
Remember to buy a larger unit than you need, set max compressor power to 75%, set fan to "Max" (it will only go to full when needed).
We installed mini-split heat pumps on our house this year, and so far, we've noticed a significantly lower energy bill both during summer and now in winter. Your videos on heat pumps are a big reason why we did this. Thanks for making these videos. It's a small thing, but these videos are making the world a better place.
Mini splits suck when they break
@@miguelperdomo786Buy a Daikin or Mitsubishi, They never break.
We had a Daikin central coil installed in our forced hot air furnace in 2022, had it removed, no heat, mold in the return vents and the dealer did not have the skill sets to integrate the unit with our furnace. At 0C these units spend too much time in defrost, thereby robbing what little heat you got from it. We live in Eastern Canada, minus 20 regularly occurs, we kept our oil furnace.The technology sucks! It is a big "connection job" on the consumer. I'm 73 and this is the worst heating appliance we ever owned. The government that forced this on us will be gone after the next election along with the carbon tax on heating fuel it imposed on us.
@@davidwalsh5756 I would argue that the technology doesn't suck, but you were sold an inappropriate unit. If you live in a region that routinely sees temps below the efficient operating range of a particular heat pump, then you're going to have a bad time. Most places in the world don't routinely see -20.
If I had bought a snow mobile thinking I was going to use it to commute to work regularly but I lived in Texas (I don't), I could easily say the snow mobile technology sucks because it won't work on bare pavement, but clearly the problem i would be having is a misapplication of the technology instead.
@@davidwalsh5756 sounds like the dealers didn't know what they were doing. usually a system like that is referred to as "dual fuel" and the heat pump is only used for low loads, with the oil/gas furnace acting as emergency heat for when the temperature outside is too low for the heat pump to operate efficiently.
Years of Technology Connections have prepared me for this.
The long-awaited heat pump episode
Next is Teletext!
I feel like I just took the final exam on a years-long course. Except, y'know, without the heart palpitating panic attacks that take months off my life.
Entropy: "No!, you can't just concentrate latent heat wherever you want"
Humans: "Ha, Ha, compressor go burrrr"
That’s a neat summary 👍
Hate stupid two-liners.
@@johnsmith1474 good that this wasn't one then, but why'd you comment that here since it's unrelated? :P
@@johnsmith1474 Wouldn't call it a two liner but you're right. Stupid meme formats like this are used so often. UA-cam comments the the worst offenders
@@johnsmith1474 Hate stupid one-liners who only criticize...
So that's why this will have another line, because that OP comment was brilliant!
If I were a science teacher, I would never do any teaching...I would just have the kids watch this channel every day. What a gem!
He truly is The Engineering Guy for household appliances. I can't wait for the geothermal lecture!
That’s exactly what I’m wanting lol
I feel like I’m in safe hands when I watch Technology Connections.
Sure, those hands that hold you are safe... But are you...?
I love how he starts most videos start with a pun
His voice is like a warm blanket
Allstate
For me it's like a lullaby. Everything in this show is me likey. Please don't change!
"the future of home heating"
*Me while listening to my 20 yo heat pump spooling up
"The future is now, moderately aged man"
Same, since 2008
@@GregHassler I used this since the 80s , living in a third world country
these have been common in warmer climates for at least 30 years if not longer
Yup. Central Valley of California where a hard freeze (below 25 F) here is considered a natural disaster. Heat pumps are THE thing.
They've become the go-to heating system for new Houses about 20 Years ago around here (Germany).
People seem to oftwn have a Hard time wrapping their head around how they work,
I usually say "Its a fridge installed the Wrong Way around, where the warm Plate is on the inside."
Thank you so much for this video, my HVAC technician and I had a disagreement today about if heat pumps can still work under 40F. He REFUSED to believe it’s possible. I was doubting my own sanity and I see now it is in fact possible!
My neighbour has one and every time it gets that cold I see him out there trying to chip the ice away from the exhaust.
Just installed my first heat pump this winter and it's amazing. I undersized it at 12k BTU for a 1500 ft2 main floor, it's not much more powerful than a toaster and it kept 22C indoors. It's a 14 hspf rated for -26C and averaged 1.4 COP when it was -26C including the defrost (15min per hour). I'm going to install another small one for my basement now and maybe one for the pool!
Where are you at? Whats the average winter temp outside ?
@@Harcix In a city north of Montreal, QC. We average 14 days a year with temperatures under -4f. You can look up those stats. I modelled my calculations for worst case of 0F and will be using auxiliary heat or let the temperature drop when it gets worse.
And update, it used 150kWh each month for the summer, meaning it cost me 9$ per month to operate and kept my house cool all summer for June, July, August. It's amazingly efficient. Still planning on installing one for my basement that I used to keep at 8C in winter.
Meanwhile in Sweden , I'm annoyed that my heat pump doesn't cool. It would have been sweet to have air conditioning in the summers!
But it does cool... you're just cooling the outside air.
In the US we use heat pumps to heat water for swimming pools. Their exhaust is cool air and when in air restricted areas the temperature gets even colder.
Edit:
They also have units that can work both ways and cool water. They are generally more expensive.
@@LeoInterVir
Cool the inside air I mean of course.
You can get heat pumps for both heating and cooling
@@LeoInterVir A friend of mine's VERY wealthy parent have a pool with heat pump that's integrated into the changing room's A/C. The heat is transferred from that room to the pool.
@@eleftherios11
I know, but mine doesn't.
This channel is basically the modern version of old school public access programming. I could totally imagine watching this on PBS at 11pm. Really cool that people still watch this type of content nowadays. Getting smarter via entertainment is an amazing use of free time.
I live in Australia, so it doesn't get as cold in the winter here as it does in North America, but in the winter it can get from between 0-10 degrees C. And my old house was entirely heated by heat pumps. There was like 6 split systems in the house, they worked great
Your videos are so informative and well put together, every time I watch something I end up learning something new or seeing something from a different perspective. Well done!
Yay, Technology Connections finally made that heat pump video we’ve all been waiting for!
Now well await the Teletext Video he promised Ages ago
I can finnaly sleep through the night
Bi gang bi gang bi gang
Nice pfp
This is the culmination of the Technology Connections cinematic universe!
"its just an ac but backwards"
me: *installs my ac backwards for the winter*
this can't possibly go wrong lol
You just need a bucket incase you have any condensate. Also earplugs.
"Turn up the heat."
"I can't reach the thermostat anymore!"
@@MikePerreman how? It's always going to be below target temperature.
@@shawnpitman876 You could always pull some trickery with a little circuit reverse engineering, and relocating the thermostat inside. Granted it'd be more work than it's worth, but It's still doable. Basically just an opposite style thermistor than what's already equipped.
It would kinda work, they're just not designed to handle frozen heat exchangers like a heat pump is.
What an outstanding video. I've known for decades how AC works. Could even draw a system for you. But I could not figure out how heat pumps work. Reason, no one told me that the condenser could also be an evaporater. That one little thing that you took the time to share saved me!
Thanks 👍
Absolutely love mine! My area does get extremely cold, mine is a “hyper heat” model for -20(f) and below -20 (actually a little above that) it has trouble, so resistive and wood pellet are required for a couple months.
My split unit compressor has saved me hundreds throughout the year.
One of the perks of being hearing impaired is that I always have subtitles turned on and therefore catch things like “Coefficient of smooth jazz” and it makes me feel happy. :)
I leave subtitles on just because I like to read as well as listen, and even after that I'm still not sure if I can identify what the coefficient of smooth jazz sounds like... XD
edit: wait a sec, did you grow up in north west ontario?
@@myclamish probably an imaginary number :)
Nope! Why do you ask? Now I’m wondering if coefficient of smooth jazz is a particularly niche slang term in Northern Ontario.
@@keri-lynnmiller7501 yeah it's all about the coefficient of smooth jazz up there, it's the only sounds you can hear through the 18 layers of jacket to keep the cold out :p
i only asked because i realized afterwards that i knew someone named keri-lynn that i grew up with who was also hearing impared...what are the chances.
Haha, that comment made me feel happy
@@myclamish most peaceful commet thread, I didn't know the coefficient of Smooth jazz was the answer to world peace.
This feels like the avengers endgame of technology connections
What you didn't see was the toast offscreen, which was being heated by the mini-split.
Latent heat "I am inevitable..."
This is only Infinity War. Endgame comes in part 2
no this is infinity war
endgame is gonna be heatpumps part 2: underground heatpump
Plz stop comparing things to marvel and Harry Potter movies 😬
This is the most thorough and valuable explanation of heat pumps and, really, HVAC systems for us normal people. Thank you so much. This deserves a lot of praise. Very well done, your effort is highly appreciated.
I live and grew up in Marion County in Oregon and all 4 houses I've lived in or gotten to know well have had a combination heat pump/air conditioning unit somewhere out behind or alongside the house. This isn't obscure technology to me, but I was impressed with how well-explained this was, and I now feel better about letting the A/C or heat pump run when it's sunny and my 12.6 kW array can help feed that hungry compressor with the 2100 Watts it wants to keep my house warm.
When I was about ten years old, 50 years ago, I asked my father why we couldn't put the outside part of the window AC inside by flipping it around to warm the house in the winter. I didn't know the way it worked at the time but I do now.
Ahead of your time sir
@Bruce Wang I think you have that backwards I would have been kicked today not 50 years ago
Because the outlet in inside the house :)
I was working for LUSH manufacturing about 20 years back. They were trying to pour massage bars however the room was too hot.
They wired up a window AC unit and placed it in the middle of the room. Being the son of a Mech Eng I was apoplectic trying to explain
how this particular thermodynamic setup was worse than nothing. Seems funny now however at the time I was truly flailing. XD
I was working with stupid people...a lot of them were real pretty so, six of one......
While it certainly would work, the amount of energy that it could pull from the outside(you never mentioned the outside temp), would make it colossally inefficient.
In Scotland, they actually use piles of moss as fuel. Yes, they use peat humps. 😝
See, I thought you powered the entire country on hatred of the English? ;-)
I don't think it's very effective in Scotland because the humidity is very high. Even if it's colder in Siberia, there's less clouds and less humidity !
You are very effective at explaining physics and technology in an easy-to-understand way, and it is even quite enjoyable to consume it too 🙂
Our Heatpump had a COP over the entire year of higher than 5 in northern germany using R290 as refrigerant. Heat Pumps truly are amazing. Even with the high prices for electricity here it is quite a bit cheaper than burning gas + no chimney.
It feels like latent heat is basically an exploit in the universe we're taking advantage of.
Just gathering and moving hot from one place to another :)
I always think the same thing about hydraulics as well as other simple machines. Literally just exploits of physics.
It's basically a battery, a form of stored energy. Interestingly, there are places in the universe that are colder than the current temperature of the universe. The Boomerang Nebula has been measured at 1 kelvin, while the average temperature of the universe is measured at 2.73 K (using the CMB).
All machines are exploits of nature: A water wheel is just an exploit of gravity, internal combustion engines is an explore of chemical energy, computers using transistors is an exploit of how electromagnetism works etc. A machine just arranges a natural phenomenon in such a way that it's useful to us.
You don't get owt for nowt, as they say in Yorkshire. Mark my words - extracting heat from from one part of the ecosystem to move it into another will have unforeseen (ie bad) consequences. I don't know what they will be but 'twas ever thus. Think your exploiting the universe? Think again...entropy is a one-way street.
The day after this video comes out, my thermodynamics class starts going over second law and heat pumps. This got me ahead of the game.
Amazing
my thermodynamics exam is tomorrow lol
Here's a shock. The laws can be broken.
@@JF32304 Wait. That's illegal.
@@Kraus- nope. Just needs the right setup/config. I know it's possible.
@@JF32304 Not sure if you got the joke
One of the best videos, I've seen to explain and justify the importance of using heat pumps.
Thanks man, I had trouble wrapping my head around this concept.
Your amazing explanation blew my skepticism away.
There was a "Blondie Comic" where Dagwood has the air conditioner in backwards, and Blondie asks "are you air-conditioning the outside, dear?" to which Dagwood responds, "Nope, I'm heating the house." It captures perfectly the irony of the situation you present.
They do work if the ambient is above -5 deg C
@@ianship5058 Agree completely... That's the irony. The comic treats it as ingenious on Dagwood's part, but ultimately a "bless his heart" stupid, sigh from Blondie, for not "just" using a conventional heater... I wish I could find it.
It’s exactly what a reversible heat pump does, only with a reversing valve instead of turning the entire unit around.
A heat pump package unit could be a conventional A/C only sealed system without a reversing valve if ductwork was set up to change the airflow. It must not be efficient as it's not done.
@@hkelly1623 Aren’t heat pumps a thing of the past/present and not a thing of the future? I see a reversing valve in our cheap condenser I think it’s an ameristar unit.
@@EastDallasKicks Not necessarily. There is a large market for them in many places. You just don't see them a ton in mini-split configurations here in the states. They are instead integrated into the traditional HVAC system. Normal AC is just a heat pump it's just that most of them are one way. Doing away with heat pumps would be doing away with Air conditioning, Fridges, Freezers, etc. They are all just heat pumps, using them for heat is still a better bang for your buck than electric heat. I haven't run the numbers for gas heat.
I remember subscribing when you were at around 150k subs, and I prayed that WHEN you hit 1 million, the videos would stay the same, and they have. This is honestly one of the best channels ever. You've taught me a lot more than anyone else could, and about things that are actually interesting. Thank you for staying true to edutainment. I honestly think you would make an amazing teacher.
I just noticed he hit over 1 milli too I've been watching this channel for a few years now still the same great content
You should realize how pitiful your compliment is, everything every stated here is covered in JR HS (or before by kids who bother to show some scientific curiosity in a library).
@@johnsmith1474 And you should realize how much none of us care about your bitter, elitist attitude 😏
@@Eric2300jeep He's emotionally unintelligent and complaining about a "lack of scientific curiosity". Notice the irony? Not everyone has the same priorities.
@@johnsmith1474 Not at all. I came for the VCR and analog TV videos a couple of years ago. I'm not from the US, but I doubt you covered Betamax and PAL vs NTSC in high school over there.
Edit: The only thing that changed over the years are the production values, and they only got better.
Awesome information!
This is actually a very common heating solution here in Sweden.
We have a air/water system in our house that functions like this. 👍
I'm building a new home right now and I installed an air source heat pump based largely on the information gleaned from this video. Thanks!
My mom used to yell at me "I'm not air conditioning the whole neighborhood! Close the door!
Showed you mom, now you ARE air conditioning the whole neighborhood now. In the winter anyway.
I live in a temperate to cold climate, so we'd have the heating on. If one of us dared open the window my mam would shout "close that window, we're heating the fucking sky!"
Good times.
i hate my heat pump. I hate electric heat. Slow, dries your skin and turns off when i need it. I prefer an ethanol fire
@@mattbanks3517 heat is heat.
@@diablo.the.cheater yes but a propane heater or a simple wood/ethanol fire is instant heat and runs when i want it to run, electric heaters and heat pumps have stupid thermostats that turn off when they want to.
@Maiahi what? since when did your parents yelling at you become a bad thing?
I love this channel, my girl seems to always catch me watching these videos and asks why I'm suddenly interested in dishwashers and air conditioners lol.
Cause u got a 🧠
Haha, "Not now hun, I'm watching a video about dishwashers!"
@@Tenebrarium why are you watching video about me? - her probably
@@lordjaashin 🤣👌 "ᴡᴏᴍАɴ=ᴅɪꜱʜᴡᴀꜱʜᴇʀ" ᴠᴇʀʏ ꜰᴜɴɪ ʙʀo 👌🤣10/10 ᴊᴏᴋᴋᴇ ᴠᴇʀʏ ʜaʟaʟ ʙʀo👌😆
@@whyamiwastingmytimeonthis thanks brah. i like it when my audience laugh their tits off to my kosher comedy.
Thanks for this. I moved to Florida from Rhode Island a couple years ago. I was told my "heating system" was a heat pump. I honestly had no idea what that was. Or how it related to the increasing popularity of the wall mount units you have.
I have serviced my own gas heaters over the years, and also understand a traditional electric system that pumps the water from room to room. Throw in radiant heat and both active and passive solar systems, and I felt I had a pretty good handle on heating systems. As soon as you explained the basics my brain went "aha" and I saw where you were going. I should have asked sooner. Not that it changes anything. I am certainly not qualified to work on refrigerant based systems. So repairs will be left to the professionals. At least now I will be able to ask questions and understand the answers if my system needs work.
My parent's heat pump kept heating their DeKalb, IL garage during the recent blizzard without issue. Heat pumps are amazing!
I'm converting my house in Galway, Ireland from oil (kerosene) to an air to water heat pump. Happy to shoot some video and some text explaining it as we get it installed.
My desire to consolidate got me dreaming of a future when a house has one big refrigerant circuit that provides heating, hot water, fridges, freezers, and ACs.
Why? So if a single part of that entire circuit fails, it ALL goes down?
In commercial refrigeration (restaurants, grocery stores etc), it is common to use a shared circuit for the chillers, refrigerators, icemakers and what-not. I don't think you could share that with an A/C system but I also am not an expert at refrigeration. This helps keep the indoor air at a reasonable temp without over-taxing the A/C.
You can already do it really. Not only do they make "mini split" refrigerators but all you need to do is modify any fridge you want with a plate heat exchanger and run a water loop through it.
Have a HVAC tech braze one on for you in place of the condenser, the run some PEX to the fridge.
@@RGInquisitor In theory, if you're consolidating it all to one system, then you could have two backup systems. On top of the main heat pump system, you have a backup heat pump and then auxiliary heating. I'm not an urban engineer/anyone else that would consider this, though, so there's probably something I'm missing
@@OrangeC7 Well you definitely could have backups, but a consolidated system in itself would already be very complex. Adding redundancy to each part of the system would be a lot more work than just having each part working independently.
It is proof of success for this explanation video that I watched the whole 35 minutes without a reduction in my attention.👍
Excellent, as always! Thank you for such readily-graspable explanations 👍 Looking forward to the next one on geothermal.
No matter how many times I hear it explained, refrigeration cycles are so goddamn magical science, it's really indistinguishable from fiction
Basically, what is exploited is that changing the phase and pressure changes the temperature seen by the opposite sides of the unit. It isn't magic so much as utilization of the laws of thermodynamics to our benefits.
It's really basic physics. You compress something, it gets hot. You release that pressure, it gets cold. An AC system is simply turning that concept into a continuous cycle.
Yes. Magic, like the OP said.
If I had TC as my science or math teacher in school, I imagine my life would have gone in a whole different direction. Thanks for teaching this 30-yr-old something new with every video!
A few years ago I was responsible for the care and feeding of a dozen or so terribly arthritic heat pumps from the 60s that the school I worked at had for the classrooms. This was in Los Angeles. So they’ve been around in some form or another. Very informative video.
I worked on a building that was SCE Headquarters in Long Beach CA, with a 1948 unit that is 4 compressor 100 hp each, R-12 heat pump with a water cooled condenser in the lower level of the basement garage, so it takes air from the garage to blow outside when running, no need to run additional fans in the garage. Of course in the heat pump mode, the water is shut off, but the fans run.
Yes heat pumps have been around for a long time. I even own a 1978 heat pump water heater made my Airtemp. It looks like a upright window A/C unit with water lines to the condenser, to collect the heat to put into a water heater tank. It has a 13,500 Btu compressor, and can heat to 120F easy!
I didn’t learn much when watching this cuz I’m a thermodynamics nerd. HOWEVER, I wish I saw this when going through the refrigeration cycle for the first time. Phenomenal explanation
I feel like T-Connections is just justifying the cost of each new household product with a video.
UA-cam is a business so anything used for a video can be a write off on taxes
@@27dcx not sure how it is in the us, but usually u can write stuff off only partially
@@officer_baitlyn You're only supposed to write off whatever fraction is used for business. So for instance, if I use my computer 8 hours a day for work and 4 hours a day for other purposes, I'm only supposed to write off two thirds of its purchase and operating costs. For things like this heat pump, he's probably not supposed to write anything off at all, because he already bought it for another purpose and just had it around and decided to make a video of it. But for something like his Edison phonograph, he could easily write off 100%, since he bought it pretty much exclusively for the video.
I was thinking that it's sort of the other way around. UA-camring is paying off, so he can buy these gadgets that improve his home, but he's Technology Connections so he sees an opportunity to do a video.
And in this case it's a great video.
@@EebstertheGreat The tax code in the U.S. is such a garbage fire, however, that people are encouraged to do some creative accounting in order to minimize their taxable income. And I don't blame them.
I was happy to hear at the end of a 35 min video that this was just part 1, tells me how much I love your content.
*CED flashbacks*
The only channel on UA-cam that can both keep me awake and put me to sleep with the same video lol I love your channel, don't ever change a thing
Brilliant explanation. You think you know how these systems work but listening to this chap explaining the system operation shows how much you don’t know.
This is like finding out that solar cells are just LEDs
Holy shit, I didn't know that.
Wait... WHAT?!
Explain. Now.
Please
@@MiniMii550 Just like all speakers are also microphones, and all motors are also generators. All diodes emit light when a current runs though them, and all diodes generates a current when light shines onto them. Both solar cells and LEDs are diodes. So shining light onto an LED generates (a shitty amount of) energy and running a current through a solar panel causes it to become the world's most useless floodlight (it's in infrared)
This video by steve mould explains this ua-cam.com/video/6WGKz2sUa0w/v-deo.html
I'm liking this refrigeration cycle cinematic universe
It's very climactic.
@@Adam-yr2nq one might even say climatic
Installed these for years. Fantastic units!
I have never even heard of heat pumps before but this is very educational. Thank you 🙏
2:09 I have an MS in chemical engineering. I know very well how the refrigeration cycle works. Yet I refuse to skip any explanation this channel does about it. It's just that good.
I agree. He has a way of boiling down (heh) topics into their essentials, giving "Aha!" moments even to things you already know about.
Same here, don’t think I was ever told it was because of the exploitation of latent heat. Glad you were taught adequately on thermo. My professors sucked so not much has stuck around. However, I still can visualize the cycle I drew and labeled sophomore year
why would you deny yourself the self validation of "yeah! right! I knew it!" ?
Don’t feel weird, I’m HVAC instructor and didn’t have any intentions of skipping this video. Nice to see the information from a different person. Will never skip one of his videos.
B.S. ChemE here… didn’t skip either.
This video feels like the first avengers, bringing all the previous videos together to create a masterpiece.
The refrigeration cycle is one of the discoveries/inventions I am most grateful for!
In Korea for a business trip and I was surprised to recognize that almost every building where I am is heated by heat pumps despite during the coldest parts of winter it getting into the single digit negatives (F). Caused some issues on the coldest nights as it would have to pause to defrost periodically but I was able to use a space heater to flatten out the curve in temperature fluctuations.
34:06 "For now, stay warm."
Me in the Philippines at 3:00am :
- turns airconditioning on because it's too hot -
get a dehumidifier
In tropical countries, heatpumps only cool, less complicated system and last longer
@@henryairconcepts2999 I live in north Argentina and every year more models sold are hot/cold because we are little pussies when temperature goes below 10 C
@@henryairconcepts2999 I'm in Brazil, heat pump are more expensive and not useful. I barely use a oil heater at half power to sleep in some winter cold days.
@@marlonmartins82 I see. I live in NZ people live in pacific area and south east asia only have cooling heatpump. And it’s cheap to buy. Maybe around $300-400 including install for small heatpump like underr 1kw
I'm from Australia and at first thought "heat pump" was going to be some amazing new technology, and then you said "reverse cycle air conditioner" and I was like "oh, aren't they standard everywhere? I have 3 in my home." Apparently not. Here they are very common and work great it our climate.
Mark Taylor wants to tell you about Australia's favourite air
Yes, you actually really struggle to buy an airconditioner here that isn't reverse cycle (unless you're buying the smallest cheapest unit possible). And that's in a location where you might turn it to heat mode for a couple of hours on just a few days in the year.
@Heather Petersen And oil and natural gas.
Hi Richard - Sydney dweller here.
Yeah i have known reverse cycle air conditioners ( hot and old ) since the 80's basically
The old part of the house has a mitsubishi reverse cycle air con from late 80's - still works great
The rear part of the house had a LG unit in @1995 but that failed and was replaced 2019 with another mitsubishi
The only drawback is you need to remember to change the cycle on the remote from heat to cool 21 heat is was different to 21 cool - so about 2 times a year i remove the batteries for a minute then place them back in and reset it to the correct cycle ( a dot moves between the heat and cool cymbals every 5 seconds , just press the power key on the cycle you want )
Also, if you are in remote or snow / freeze zones you need a higher end model specifically for freezing areas ( like much of north europe / canada ) these machines are more expensive as they have electrical heating element in the outside evaporator to defrost it beore it starts working
Regards
George
Same here in Argentina, we have one in each bedroom and living room and it works great!
Alec probably just walks around his house and the first thing his eyes lay upon, he's like "I'm gonna make a video about that" and I love it
I don't know why people don't think abstractly and think of "AC" (conditioning the air but only in the cold direction for some reason (well...of course)), a refridgerator, among some other appliances as just "applied heat pumps." I was actually surprised to see your title, as you have the earlier videos about how there needs to be a place to pump the heat so those inside AC units without a part outside don't work. But then I realized how helpful it would be and how (seemingly) silly it is we don't use the same heat pump for "AC" as we do heat.
I'm glad you made this video because it really is as simple as having the temperature control "executor" would be that display that labels the compressor and evaborator twice. I suppose calling them the higher level category about them being one of two ends of the heat pump might help.
Speaking of heat, I also want to thank you for those videos about ceramic room heaters (completely random other than concept association with heat).
Anyway, great video as always. I know I'm late but that's video on demand platforms for ya.
It’s really common that heat pumps are used for both AC and heat though. My place is a piece of garbage but we have a heat pump for both AC and heat; it sucks
Hello !
I'm from France and I have some interesting things here.
Members of my family are farmers, and because of the huge house they got, they had to find a good way to heat up the space without having to go bankrupt every winter. So they installed a heat pump as a main heater (for hot water and heating the interior). What's interesting is that they do not use a air heat pump, they use a water heat pump, let me explain.
Because they have a huge need of water for the animals, they had to install their own pump in order to avoid paying too much to have water. The water is directly pumped from a water table below them. So the water is basically free.
What the pump does is that it drain water from the water table and then suck up its heat until it reaches 4°C (so it doesn't freeze). Then the water is RETURNED TO THE WATER TABLE (it's not wasted).
The main advantage is that the water is almost all the time around the same temperature because it comes from underground (around 12/14 °C if i remember correctly) so there is no problem in using it during really cold and humid weather and it is also extremely efficient. You where talking about underground source for heat, so it's quite close.
They still need to use their fireplace to heat-up the air but it's already a huge advantage.
On another note, in the family house we have in a very humid region (next to the ocean), we have huge problem with heavy humidity building up inside the house and also the walls (the house is quite old and made up of materials that are quite porous. So we bought a dehumidifier to try and remove a lot of that humidity. It's a very heavy bloc the size of a big computer case. For what I understood about it, it's a closed heat-pump (closed AC to be more precise) that cool the air at the entrance to condense water inside a small tank then simply transfer the heat to the output air via another heat exchanger, the air coming out is a bit warmer than ambient air but it works quite well. We need to empty out it's 5 Liter tank of water every 6/7 hours of it working (inside a small room).
Hope you find this interesting ! I'm waiting for part 2
It seems that water/air and water/water heat pumps will be covered in part 2. Or I hope so.
They have geothermal heat pumps here that work on the same basic principles. You are using the ground via the ground water as a giant heat sink so that your heat pump will not have the problems that my heat pump will have when the outside air is below or near the boiling point of my refrigerant. I have a similar dehumidifier in my basement. It cools the air down which causes some of the water in that air to condense out which is then dumped through a hose to a drain. The air is then run through a counter flow air to air heat exchanger to warm that air and pre-cool the entering air before the exiting air is blown over the condenser coils and released back into the room. This also pre-cools the incoming air before it is blown over the evaporator coils. I am not sure what the efficiency is, but it would heat the air a bit equivalent to its electricity consumption, which, if holding the same amount of moisture, also lowers its relative humidity as well.
You can also do exactly that concept with modern heat pumps...you just need to run coils of pipe through the ground to absorb energy from the ground.
Whats also interesting is that the heat pump is a two stage heat pump. The first stage is around 30/40 °C to heat up the house and a second stage use the first stage has a heat source to rise the temperature to around 80/90 °C (very hot) for hot tap water (shower, dishes and stuff).
If I remember correctly (and I will need to ask for the manual later), it uses the same circuit but cut into 2 sectors with their own pumps to perform the action.
That sounds like it's just an open loop ground source heat pump.
As someone who lives in the south, you have taught me something new about my A/C unit. I always thought that the heating mode was just turning on a space heater style system as it's commonly referred to here as the "heating coil". This also explains why it takes a minute to swap between heating and cooling.
As someone who's lived in the south, you weren't entirely wrong, actually. There is a resistive space heater type coil in there to supplement the heat pump. Our unit when I was a kid also had an "emergency heat" mode that only ran the heating coil. I assume that mode was there in case the compressor outside broke.
Heatpumps are common in warmer climates in the USA. I'm not sure about everywhere but in Texas atleast where I worked all heatpumps have an electric heating element installed and hooked to the "emergency" heat circuit of the thermostat. This is there to help compensate on really cold days below freezing when heatpumps start to loose efficiently.
It may be what you think. Some are. My brother-in-law only had resistance heating in his former house in Missouri. Just the way it came when he bought it.
However, usually they're used to supplement rather than be the main source of heat.
@@raptor1jec Emergency heat mode was for either that scenario or one where older style heat pumps (like my old one before I replaced it last year) couldn't keep themselves defrosted during very cold conditions. Older units were quite dumb and ran on a combination of time and temperature and sometimes it was not sufficient (in my case, sustained 5F and below which is uncommon for this area). I had it happen a couple of times and my whole heat pump turned into a block of ice. Good thing electricity is cheap here.
Mind blow!!! 🤯 to have a system like this in an air induction system to work only till freezing and have the gas portion to kick in when freezing and below would be a great idea and more efficient I would think. Great video and explanation, keep up the good work!
Cool, In NZ about 90% of houses have heatpumps. I never understood why they needed a defrost cycle until now, Thanks! Id love to experiment with my own ground source heatpump one day too.
Me, 2 minutes into the video: "All I have to do is turn my air conditioner around? Done."
You joke, but you can literally do that with a window mounted unit. The temperature control would be useless but yolo.
Dont even need to reverse it. Just take it out and run it, the heat produced is greater than the cold air produced from the AC part of the unit. Its how I kept my room back at my parents house warm during the winter cause it wasnt connected to the central vents.
@@GreyValkrie if you run it with the whole thing inside, it is equivalent to resistive heating and therefore much less efficient. It's no longer running as a heat pump.
@@GreyValkrie sorry but mining crypto currency or running an electric space heater would have been better.
Someone needs to modify a portable dual-hose air conditioner to basically change the hose connections to the top portion for heating, and the bottom portion for air conditioning. This would eliminate any need for even reversing the direction of the refrigerant. The hoses present some loss (as they are moving air, warm or cold depending on the configuration) but it'd be, effectively, a portable self contained mini-split system.
Of course it would be loud as the compressor is inside, but this would be perfect for a garage or basement year-round. My portable dual hose unit has a heating function but it literally runs a ceramic heating element inside the unit like a space heater, thus is no more efficient than a space heater.)
Even if it cost $1000, it'd be worth it.
This channel must be in the top 0.1% of all channels out there. No constant repetition to pad the content, no half naked women for clickbait, no constant merching or sponsor messages. Just good solid research and no nonsense compilation of the facts. Excellent. On a par with Veritasium, Tom Scott & ElectroBOOM.
This, Project Farm, and Scott Manley are my go to channels.
If you like these channels, you'll love Tech Ingredients, I'm sure.
I'll add Applied Science to the list
Watching this again. Appreciate the explanation. Enjoyed the bloopers at the end. 😄
I watched this video close to when it was uploaded, only after shopping around and looking at split a/c units do I truly grasp the concept.
I'm hyped for ground-source heat pumps.
We've pretty much moved past them at this point. Air source are so efficient and ground source are so expensive to install, they really don't make sense anymore. In many cases, it's more cost effective to install solar panels to make up the difference.
Same with solar water heating. For several years now, it has been more cost effective to install a heatpump water heater and solar panels than a solar water heating system.
@@wiredforstereo interesting. I thought maybe ground-source would be more scalable (for larger buildings) and better for extreme climates.
@@snowballeffect7812 They are better in every way, except initial cost. Mostly because everyone is doing it wrong though. Really, it just depends how long you want to wait until it becomes worth the extra cost.
As in geothermal?
@@xHadesStamps No, more like trying to "bake" the soil during summer and trying to "freeze" it even colder during the winter. Geothermal uses already hot rocks/soil to provide the heat for electric generation or heating only (no option to reject heat into the rocks/soil).
for 20 years I've been asking sales reps to explain heat pumps, how they work, and how my cost would go down as brochures and signs say. No one could tell me. Next door got a huge carrier unit installed I asked installers, they couldn't be bothered or didn't know. Now I know. THANK YOU SOOO MUCH!
Heat pumps do not work under certain temperatures. Below 2 degrees the part outside; the heat exchanger slats start to ice over and the heat coming out drops to negligible. Be better to get a blanket. Believe me I live in a cold area and it’s better to light a fire.
@@xr6lad As stated in the video, it depends on (1) which heat pump you get (more expensive models continue being efficient to -20ºF), (2) how old it is (they have come a LONG way in the past ten years, so if you have an existing old heat pump you are basing complaints on that probably doesn't apply to a new model), and (3)what you mean by "do not work". They don't just stop working, but slow down their heat moving abilities. I'd say definitely when the COP reaches 1.0 it is definitely no longer "working", and a more conservative estimate would look at when the COP dips below the ~2.5 that it takes to be more efficient than natural gas. Realistically, you should compare it to what your "backup/emergency heating" system is. But, again, if you spend enough up front on your heat pump, it doesn't even cross the 2.5 "natural gas" barrier until it's below -20ºF, so clearly most people in the US can get a *lot* of efficiency out of a heat pump system. For instance, a Mitsubishi H2i has a COP of 2.88 at 5ºF and 2.5 at -13ºF, and it isn't the most deluxe air-source heat pump out there! Of course, if "money is no limit" the next video in this series on ground-sourced heat pumps should be very helpful (there, the cost is in excavating to install the ground source tubing, rather than in fancier electronics and more efficient compressors to squeeze more heat out of sub-zero air). The point is, though, even if you "couldn't" run your heat pump for 10 super-chilly nights in a year, they all have a backup heat source to switch to. Isn't using a high-efficiency heat pump for 90 nights and gas for 10 a better idea than gas for all 100?
@@xr6lad Not true. There are units rated to work down to at least -25°C. Also not everywhere in the world has gas available. I don’t unless I buy bottled gas.
The installers may not know. They may have a job that takes 12 hours to do properly and would rather focus on that. If it snows a lot in your area, stick with the gas furnace. The wear and tear is too much on a system running 24hours, and the system he’s going to mention in the next video is so expensive to install that it’s not worth the little you save with greater efficiency
@@xr6lad I won’t believe you. I live in Norway. We know a thing or too about cold. And heat pumps are the standard for new houses here, has been for the past decade atleast.
Way back in the day, heat pumps were useless below those temps. But the tech has moved forward, and they now work just fine down to -25°C. Yes, they lose efficiency, but are still a viable option, depending on factors like house size, room layout, insulation, etc.
If you live in a place that might see temps below what a heat pump can handle, like in Norway, it’s recommended to have supplemental heat sources for those periods, but that’s again down to different factors per user.
Nice explanation. Most peoiple who try to explain refrigeration concentrate from pressure changes (Boyle's law) and ignore the vital phase changes. Good Job!! Also in cooling mode, my unit takes the condensate and evaporates around the condenser, thus recovering the heat of vaporization of the inside humidity. Very Efficient.
Hi! i use heat pumps like these to warm my house here in Sweden during the winters. I have 2 and never had any problems even at -30c, and it's the only thing heating my house. So it works really good!
Even at -30 ??! Maybe you have low hygrometry because your external unit freezes very fast and it makes a lot of defrost cycle (and waiste electricty of course) I live at high altitude and I only use my heatpump during the afternoon when it's very cold. Then use wood during the night.
I'm teaching thermodynamics in my class right now, and this is perfect!
"Today we are going to demonstrate how heat pumps harness the power of Maxwell's Demon to isolate high energy particles from a mass of randomly moving molecules, and transport them across a thermal barrier."
“Another plug?” “Why, YES!”
So many plugs in this video he needs a power strip
That's what she said?
EV owners be like
😂
They are quite common here in Finland. Our apartment has one, they are Nordic models of course. We have wall batteries for those really cold night (-20-30C) but there don't come on very often unless going in and outside.
The first part of this video explaining how heat pumps work made me happy, my grandpa put a window a/c unit in my room, it just made my room hotter.
I really like the way you explain things.
#MeToo
And let us easily skip through parts already explained before ;o)
@Porky P Iggy I got my heat pump free but now my neighbor is missing his 🤣🤫
@Porky P Iggy I would need a wife first 🤣. If you know her, please make the introduction.
I really don't. Some graphs, diagrams and animations would actually have been helpful instead of a monologue and images of devices, pipes and hoses.
As an engineer, that was a brilliantly clear explanation on how refrigerators and heat pumps work. Well done, dude!!
THE SPLIT HEAT PUMP doesn’t have built-in resistance heat? I thought that was standard backup heat for heat pumps. (That’s how my whole home unit.)
.
They are still a piece of shit in Michigan for heat. They are hole in your pocket in the wintertime and don't keep you warm on cold days. Don't try to bullshit the HVAC installer/ Mechanical Contractor.
Hey TC, I'm like you and find this stuff cool. You might get a kick out of how large jets provide pressurized cool air to the cabin. They call it an air cycle machine (ACM). It's similar to an AC, but doesn't use a refrigerant. It still uses heat exchangers (radiators), but also uses a turbine (turbocharger). It's kind of cool how it works. They can't just take cold air from outside because it needs to be compressed to help people breath (air is not dense enough at altitude), so they bleed air off the jet engine compressor. That air is hot because it was compressed, too hot for the cabin, so they send it through the air cycle machine. If you get some time check it out, I think you'll enjoy it.
You have some really wonderful PBS vibes. Thank you for sharing your knowledge! :)
"My garage has a problem of being too humid."
"So anyway I use the air conditioner to melt the snow off my car inside the garage."
I hope he gets his car washed fairly often in the winter, then. A bunch of freeze-thaw cycles of salt water are much more likely to cause rust than just a deep freeze would.
@@jonathankleinow2073 Yes. But really in a perfect car owner world one had got a car lift indoors and a water jet to wash the underside off. Just cleaning the sides and wheel houses are not enough. You need to get under and clean :c And then let the car rest and not drive it home on slat roads. And AVOID the spinning washers of death! Cost money to ruin the car? What?
But that is you care about rust and like to keep a car running for decades. But then your not going to own any modern car. And btw you basically need a garage for electric cars in winter. Or your having to keep the battery heated form the cold. Makes no sense to own a Electric car unless your not parking on the street and live in a place it makes sense. Anyways.
If I ever build any building in my life it will be a double garage with a lift. And a smaller size room for a bed and kitchen in the back with washer and toilet/shower. I rather live in a garage then with crap cars that is being ruined by the salt. Can do allot of stuff in a empty big garage. Cost less to. (vs a living room) You just need good garage doors and limit the height of the roof and the building will be cheap to build and run. No windows and no wasted space. A efferent heating and cooling space. Just not family friendly. Good. I rather visit others and live outdoors.
One of the lifts that are easy to drive onto. So you always park on it to wash. (but a jack point lift is best for repairs but simply not good for everyday stuff) Even a deep freeze is affected by road salt. Better to keep the **** off. It also is better for the car to start in a heated environment. -25 Celsius or more is simply to big of a strain on the drivetrain. Even with block heaters and hours of time heating before starting it is just not right. You basically need such a intensive water and oil heating system to keep the engine temp good enough to safely start it up. You might be better of emptying the car of the liquids and heat it on the stove if standing outdoors... No joke that's what it takes. Emptying the liquids and keep them indoors. Then your still having to get under the vehicle and still stuck with salt under the car.
Even + 1 Celsius environment is such a advantage for the driver and vehicle. Thinking about a costume lift built into the ground. So you don't have to lift the car up as high and the car can drive right onto the lift without any hassle. Basically a better oil pit with more space and flexible. (like a flexible standing desk at work). So you can get away with a low sealing garage. Since your lift is down in the pit and only need to raise the vehicle half a meter or so at most. (safer and flexible) And in a pinch you got enough space under the vehicle to not even need the lift to work. Agen a better oil pit. The hole point of the lift being to give as good access all around the vehicle as cheap and safe as possible. Downside being flooding and having to spend more time on the foundation. Not worried about flooding but the cost of install.
Then you basically can be down there with a rag and water bucket :) Or just spray it off but expect to be a bit wet from doing the hole car that way. Only way to combat salt is to get under there and clean it. No way to reach it otherwise. Well unless you let it melt away and then go after the remaining SALT. But you NEED to care to combat salt. No one really do. But I rather spend money on a lift and garage door and keep the cost down by making sure repairs are cheap. (and vehicles that do not require expensive repairs)
Heat pump and wood stove for the win! And a living room with garage door access! No sweat getting a fridge or a bed indoors ever agen! Just keeping the garage doors and lift in good nick! And vehicles you can care and love for. Making sure you can access the world and still have a grate living quarter.
@@TheDiner50 or just smoke more crack!
@@TheDiner50 I mean, alternatively, you could just live somewhere that doesn't salt the roads
@@TheDiner50 You should check out The Detail Geek on here. He runs a detailing business out of his heated home garage in Saskatchewan, and he has a undercarriage sprayer attachment for his pressure washer that he uses on the vehicles he washes.
"Where ever there's a temperature gradient, nature is hot and bothered, frankly, and would very much like it to achieve equilibrium."
This kind of wonderfully elegant wording and effortless delivery is the type of witty content I love to see.
I was casually scrolling and read this comment at the exact same time he said it and for a few seconds I though the matrix glitched lmao
When I upgraded the original and outdated HVAC system in my last home, I went with a combination air source heat pump and a gas furnace. That replaced both my ancient air conditioner and worn out gas furnace. I’m in Minnesota, and the thing that I appreciated is that the thermostat was capable of auto controlling the two based on the outdoor temperature. The gas furnace was only really used when the temperature dropped below 10°F.
I'm in New Hampshire, our house isn't THAT old, but as is typical with New England rural homes built before 2000, it has no central AC, uses forced hot-water/baseboard heating and an oil furnace, with a large supplemental wood stove in the main space of the house. My home is about 3000sq ft and two floors, with the upstairs bedrooms having baseboard resistive heaters (upstairs was finished years after the home was built and was never properly rough plumbed for more heating zones). We've wanted to go to central AC for years, but up until recently, since our home wasn't ducted for forced hot air, our choices were really those garbage high-pressure attic-deployed systems, or more recently mini-splits, but if you want AC in every room and don't want to have to keep doors open, you're putting a multi-zone system in with indoor units installed in each room, likely requiring multiple outdoor units, an extremely expensive endeavor. The upside is that we wouldn't need resistive heating upstairs anymore and barely use the oil furnace except to supplement on the days that it gets below zero, but I'm curious about how well the better and new systems can handle those nights when it's -15F outside. Does your system still function much when it drops below zero in heating mode?
I'm really tired of all the mixed message you get on the subject. On one side, you have people that want the technology deployed because it reduces our need for fossil fuels, which is great, but those people often just use the best case scenarios and generic statements to make their points, like "Modern heat pumps use 1/4th the energy as other technologies like electric or gas", or when questioned about their cold weather capabilities they often respond with something along the lines of "you're thinking of the old American heat pumps of the 70's and 80's, modern heat pumps work below freezing, not a problem anymore, even Sweden and Norway use them". I'd be willing to consider completely gutting my home's HVAC system to deploy quality multi-zone mini-split systems, but for my home since we don't have any ducting, we're talking at least $50K for enough properly sized units and the installation, I wouldn't want to spend that kind of money if the system is only useful on 50% of the days from November to March.
@@racerex340 Exactly my thoughts on this. I have cast iron radiators with gas boiler, and I just love them and the quiet, even heat they produce, and don't want to get rid of them. . Also, with an older home in a cold climate, you really have to air seal and insulate well to make the mini split heat pumps effective. The mini splits are mounted on the ceiling or high on a wall, great for A/C but I would think less effective at heating at floor level. I lived in an apartment with forced air heat all the vents at the ceiling and the ceiling was hot while the floor was freezing. Also in my case I have a vintage home, and the look of the mini split heads would clash with the trim and mouldings I have in the house. I got a quote for one mini split head and one outside unit of about $5,500. I would need at least six or seven to do main floor, and another two prob if I finished the attic.
It makes me sad it took me so long to realize that this is an application of the joule-thompson effect/coefficient! I'm so glad this channel is here!
Just a random comment. Thank you for taking your time to add subtitles. It's amazing since I am hard of hearing.
When searching R-134, make sure to press the “1”
But why though...you'd end up finding something much better without the 1 😉
@@Justme-jt1ef You'll get the Nissan Skyline/GTR R-34 car.
You want cars?
Lmao 🤣🤣🤣
Rule 34
You are 100% correct about heat pumps being extremely common in the south. I am in Northern Mississippi and it's pretty standard here. I suspect they are so uncommon up north because the companies selling them don't want to deal with the massive number of complaining customers for those times when it doesn't work because it's too cold. Up north, there are typically weeks of that several times every winter. Here there are maybe a couple of days like that in several typical winters.
It seems to me that there should be an alternative though. You could have a two stage system using two compressors and two refrigerants and easily extract heat from outside air even at 50 below! Yes, the 2nd compressor would make it far less efficient when it's 50 degrees outside. But it could be designed to only use the 2nd stage when it drops below say 15 degrees. That's around the temperature that heat pump efficiency really starts to drop off.
In Michigan it is rare to see a home heated with a heat pump. And the ones that do use heat pumps are usually equipped with a gas or resistance heat backup.
@@ryanvandy1615 Yep, they don't save enough to justify the cost up there because it simply gets too cold too regularly. Heat pumps are extremely efficient at temperatures above 40 degrees, but below that they drop off steeply, At 30 degrees they still work, but you aren't saving nearly as much. At 20, you are pretty much breaking even. Below that, they are virtually worthless, so some other means of heat has to be used. Here in the south, that's only a night or two on average per winter, but up north it's all day and night for weeks at a time every winter. While the heat pump might save you some money in the fall and spring it's not useful in the winter and so not a very good investment. You still need far better heating than we have down here and makes more sense to put your money into that system.
Hey I’m from the MS coast, still never even seen a furnace heated home haha
Great video very complete and a lot of technical data. Keep up the good work.
"We're still talking about refrigeration but I wanted you back for this"
>.> Fool me once.
Coming to this channel is like talking with my twin brother. Seriously, 99% of what you do is what we've discussed for years, save for of course the newer topics. Sadly, I lost my brother to leukemia, so in a really odd way, this channel is almost like being able to hang out with him again, which is comforting.
Btw, we were both connoisseurs of Xmas lighting, still haven't found an off the shelf, non-garnish, mon-flickering, LED set yet :D
I’m sorry for your loss and I’m glad you’ve found a way to celebrate your brother. Even when bittersweet, I am always appreciative whenever I feel the joy from someone that’s gone.
R.I.P.
@@Blankult Hi.
I ask around to see if someone would
be interested in a lil Project of mine.
Some people try to be the 180 Degree Opposite
of Cancel-Culture and try to help UA-cam
become less... well, lets say 'Messy' to use nice words only...
...
Interested to hear a bit more?
@@loturzelrestaurant What is it?
@@Blankult Well, well, where do i start to explain?
Basically, looking away from Issues is real popular. I guess you know that.
And you surely knew about Cancel-Culture being 'bad'.
Yes, it is.
BUT did you knew that its 180 Degree Opposite does exist?
Some people try to get stuff removed/deleted because they wanna help.
Just like Real-Life has the Policephonenumber, UA-cam has the reportbutton. It exists for a Reason.
Not for no Reason.
So the idea is that Racism and much more is findable and reportworthy; a combination that should lead to... well... reportbutton-usage?
Sorry, I'm not a big Speech-Maker, just some Guy who got many Covid-Deniers removed; this week alone; but well.
It does not work 'enough', overall,
but it works enough so that i got the Idea 'why not ask people to join the Fun?'
I love heat pumps :) we use air to air in the apartament and water-water at the house. even now when the electricity is 3-4 times as much is cheaper then gas. We keep it at 21C to lower further the costs. We insulated the gome and the attic cc with spray on foam the thing cost at least 70% cheaper
We use a heat pump as well for our heated flooring as well as our AC unit which can heat or cool using the same water and heat pump as the water cooling unit. Just got to shut the valves for floor hearing in summer so the water only travels to the AC unit.