I'm looking forward to a follow-up as the outdoor temps get colder. I really want to do this for fresh air exchange in a very tightly insulated tiny home
Have you considered using the version of corrugation where the sheets are aluminum and the support structure is plastic? I'd imagine it would be much more efficient considering plastic doesn't conduct heat nearly as well.
@GregAtlas originally I considered copper but the expense was really high. Aluminum would work for sure if it's available. At the time I saw commercially available HRVs using plastic core material which led me to that plastic sheet material. Still running great.
That's an interesting way to make the heat exchanger. I've thought about a economical way of making one years ago and never considered using plastic as a material. It's heat conduction is so poor compared to metal. But being as thin as it is, it might still be adequate. I'm sure this will be be far better than just opening a window in any case. But the efficacy of the the heat exchanger won't be measured by the CO2 levels, an open window will achieve the same thing. It'll be measured in temp. differential between incoming and out going air when there is a big difference between inside and outside.
Just a thought, but you might be able to improve heat exchange by making this a 2 or 3 stage system with each stage being the same thing , just one porting into the next. Also, running lots of copper wires through the corrugated plastic (passing through the planes) could help with plastic's heat conduction shortcomings.
Thanks Siggy in CR. I considered copper and aluminum but the cost was so high along with having to be concerned about metal corrosion over time. Then I saw that some commercially available units can use plastic for a core which is why I went that direction. With a high efficiency heat exchanger I can see that you could scale it down in size but with this material its cheap to scale to a larger heat exchanger that it should overcome the efficiency. I use a PEX coil for my aquarium radiant heat exchanger as well and it does a great job of heating 2100 gallons of water I just need to use a 50'+ heat exchanger coil. Very good point on measuring the heat exchanger efficiency I did not even cover this outside of the thermal imaging. I think the next video I do for a follow up on this HRV after its been running a few months will focus more on heat exchanger efficiency as I don't have enough data to really cover that yet. I have observed that intake air after the HRV has been fairly close to room temp but we have not had any really cold days yet. As an example this morning the intake outside air was 51F before entering the HRV, Room Temp is 72F , Intake outside air exiting the HRV was 68F with both duct fans running at 100%. I think I am going to need to log these readings or get some temp probes to place in the air ducts to I can constantly measure.
Sweet! Thank you for this video. I don't keep aquariums right now oh, but I was looking for heat recovery for fresh air. I would not have thought about plastic, I thought they had to be metal. But, like you said - slower air movement = more time for heat transfer. And for that cost, you can make it bigger. (More surface area for exchange)
This was stupendous! If I understand it right, the difference between a heat recovery ventilator and an energy recovery ventilator is that ERV allows the transmission of humidity along with the temperature. What is the inner filter made of in an ERV? Would a different corrugated medium similar to those plastic boards, but able to transfer humidity/moisture, turn this HRV into an ERV?
It is informative. Please share the update. Where will you install it. The core where to find the core. Please share the link or where to find it. Thank you I plan to build one
Hey very interesting solution. I saw a similar design online. Did you use that as a base or this design was inspired by the comercial level hrvs. Also do you have any updates on the performance? Thanks for thr video, it looks super interesting
Now that the winter is over.. how did it do with the condensation?? I need to do something with my house cause i have very high humidity and mold inside
The only condensation issue I had with condensation was on the HRV box itself and the output of the outside air into the room duct. I placed a fan on the HRV and the issue was solved. The internal condensation drained into my buckets the HRV was sitting on without an issue.
This is the model i have GZAIR CO2 Data Logger Monitor, IAQ CO2 Detector, Dual-Channel NDIR Sensor, Tabletop Carbon Dioxide Meter with Data Export, Temperature and Humidity, 0~5000ppm Range
Thanks Sylvan dB. I did experiment with house plants and did not find that they were able to make major difference in co2 levels. I might do more experiments later but the number of plants needed might be more than I would like to manage.
This is amazing. This should be taught is schools. Very important and for health ❤❤❤❤
I'm looking forward to a follow-up as the outdoor temps get colder. I really want to do this for fresh air exchange in a very tightly insulated tiny home
I'm really curious to see how this DIY version works. It makes too much sense to do this instead of paying 4 times the amount for a regular unit.
I've been looking for a budget friendly version of a hrv. Thank you!!
Thanks Thomas T. I'm glad you enjoyed the video.
Yes, I looked at a bunch of crap videos before I found this one. Great Work!
Thank goodness for this video - finally an awesome explanation of what a HRV is!
This is gold!
Have you considered using the version of corrugation where the sheets are aluminum and the support structure is plastic? I'd imagine it would be much more efficient considering plastic doesn't conduct heat nearly as well.
@GregAtlas originally I considered copper but the expense was really high. Aluminum would work for sure if it's available. At the time I saw commercially available HRVs using plastic core material which led me to that plastic sheet material. Still running great.
I love it, smart gentlemen, very simple and efficent design. I will try this sometimes, only problem is I live in Apartment😞
That's an interesting way to make the heat exchanger. I've thought about a economical way of making one years ago and never considered using plastic as a material. It's heat conduction is so poor compared to metal. But being as thin as it is, it might still be adequate. I'm sure this will be be far better than just opening a window in any case.
But the efficacy of the the heat exchanger won't be measured by the CO2 levels, an open window will achieve the same thing. It'll be measured in temp. differential between incoming and out going air when there is a big difference between inside and outside.
Just a thought, but you might be able to improve heat exchange by making this a 2 or 3 stage system with each stage being the same thing , just one porting into the next. Also, running lots of copper wires through the corrugated plastic (passing through the planes) could help with plastic's heat conduction shortcomings.
Thanks Siggy in CR. I considered copper and aluminum but the cost was so high along with having to be concerned about metal corrosion over time. Then I saw that some commercially available units can use plastic for a core which is why I went that direction. With a high efficiency heat exchanger I can see that you could scale it down in size but with this material its cheap to scale to a larger heat exchanger that it should overcome the efficiency. I use a PEX coil for my aquarium radiant heat exchanger as well and it does a great job of heating 2100 gallons of water I just need to use a 50'+ heat exchanger coil. Very good point on measuring the heat exchanger efficiency I did not even cover this outside of the thermal imaging. I think the next video I do for a follow up on this HRV after its been running a few months will focus more on heat exchanger efficiency as I don't have enough data to really cover that yet. I have observed that intake air after the HRV has been fairly close to room temp but we have not had any really cold days yet. As an example this morning the intake outside air was 51F before entering the HRV, Room Temp is 72F , Intake outside air exiting the HRV was 68F with both duct fans running at 100%. I think I am going to need to log these readings or get some temp probes to place in the air ducts to I can constantly measure.
@@siggyincr7447 I like the 2 stage or 3stage idea which is similar to what I mentioned about expanding the HRV size.
This is just amazing. It seems so simple and so good. I'm really waiting for the results after a few months! Good luck with it.
Very creative!
Sweet! Thank you for this video. I don't keep aquariums right now oh, but I was looking for heat recovery for fresh air. I would not have thought about plastic, I thought they had to be metal. But, like you said - slower air movement = more time for heat transfer. And for that cost, you can make it bigger. (More surface area for exchange)
Great description
Very good job man.
This was stupendous! If I understand it right, the difference between a heat recovery ventilator and an energy recovery ventilator is that ERV allows the transmission of humidity along with the temperature. What is the inner filter made of in an ERV? Would a different corrugated medium similar to those plastic boards, but able to transfer humidity/moisture, turn this HRV into an ERV?
Here you use two separate ventilators right? One which pumps air from outside to inside and one which is pumping the air from inside to outside.
Yes one vent fan for each air flow.
It is informative.
Please share the update. Where will you install it.
The core where to find the core. Please share the link or where to find it.
Thank you
I plan to build one
The White Corrugated Twinwall Plastic is linked in the video description. The HRV is still running great.
Thank you sooo much
Hey very interesting solution. I saw a similar design online. Did you use that as a base or this design was inspired by the comercial level hrvs. Also do you have any updates on the performance? Thanks for thr video, it looks super interesting
how much does this affect the ac running?
Amazing content thanks
I’m curious as to which CO2 meter you are using to measure
Did you ever think of using the guts ( heat exchager )from a condensing dryer as the core for your unit ?
Subscribed.
Thanks for the content.
Keep up the good work.
בס'ד
Now that the winter is over.. how did it do with the condensation?? I need to do something with my house cause i have very high humidity and mold inside
The only condensation issue I had with condensation was on the HRV box itself and the output of the outside air into the room duct. I placed a fan on the HRV and the issue was solved. The internal condensation drained into my buckets the HRV was sitting on without an issue.
@@algawura2 thanks for sharing
What type of co2 meter are you using to measure your home levels
This is the model i have GZAIR CO2 Data Logger Monitor, IAQ CO2 Detector, Dual-Channel NDIR Sensor, Tabletop Carbon Dioxide Meter with Data Export, Temperature and Humidity, 0~5000ppm Range
The black version of that plastic should transfer heat better
No...the color has nothing to do with the heat transfer of this plastic. You're thinking of radiant heat absorbed from sunlight.
@@bobbywedding yes it does. heat released is different with different colors as well. radiant heat isn't only for absorbing
all links are wrong!
HRV is a good choice in general. But for CO2 specifically, maybe growing more plants would be better?
Thanks Sylvan dB. I did experiment with house plants and did not find that they were able to make major difference in co2 levels. I might do more experiments later but the number of plants needed might be more than I would like to manage.
@@algawura2 yeah that's a fact that is backed by several studies