STOP!! Buying the Wrong Air Filter Can Harm Your HVAC!
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- Опубліковано 24 лип 2024
- It can be very confusing to purchase an HVAC filter. Buying the wrong on can cause serious problems down the road. It wasn't until I did my own research that I learned this.
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"we learned that home depot just made some shit up" 💀🤣
Of course, I have Home Depot filters (Merv 8) because they are next door to my hair stylist. Next time, there's Amazon and I will save gasoline!
A few things to keep in mind:
1. The only way to see if a filter is causing too much airflow restriction is measuring your static pressure with manometer.
2. A new filter might not restrict too much airflow, but as they get clogged with particles, often the higher MERV rating ones can restrict flow more quickly.
3. The primary purpose of filters is to protect the equipment, but using a Fiberglass filter as recommended by some HVAC guys, can allow more dust to accumulate in your system. So it's a balance between too little filtration/high airflow and too much filtration/low airflow.
4. If you can, using a 2" or 4" filter of a given MERV rating, will provide more airflow than a 1" filter. This is difficult for those with 1" ceiling return filter setups.
5. I have gone with a MERV 5 to 8, until I can get my manometer in place and do some testing. Seems like a reasonable balance.
6. If you really want clean air for health reasons, consider a dedicated room air filter system (the Swiss make some very effective ones, but are expensive).
I have an old system with a fan dP of 0.2 in. wc. To get the recommended air flow of 350 to 400 scfm per ton of refrigeration, I use the filter with the least air resistance. The filter is used to protect the evaporator coil, not to keep your house dust free. I am only concerned with keeping out particles that will bridge the small openings of the evaporator coil. Particles the reach the coil are probably caught by the condensed water that runs down the coil. The entire air volume of a house passes through the coil every ten minutes during AC operation.
What we don't know is what the airflow of each filter is? We can see pleats we can see merv but we don't know the actual performance.
I like your table!! Thanks for the great video!! I use Merv 11's through Filter Buy. I have an American Standard Variable System, it doesnt have a problem with these filters
Glad you liked the video. Thank you for watching.
If you have a 1 inch filter, no higher than MERV 7, unless you find a higher MERV with technology that does not increase static pressure. If you have a 2 inch filter, MERV 8 would be okay. What I would suggest is to convert/adjust your filter box/insert to a larger thickness, 4”, 5”, or even 6 if you can. The larger, the more surface area on the pleats, the higher the MERV can go without an increase in static pressure. But not too high. I have heard no higher than MERV 11 withe the larger filter.
What i found on my system is the cheaper filters buckle and are difficult to get out when changing, not good beccause it leaves big gaps while running. Im trying a 3m 1500 this Month and so far system to be running fine and no buckling because it has very good support. Also newer model havac fans increase speed to over compisate for dirty filters. Time will tell
The filtrete 1900 has 54 pleats
3M filtrete 1900 - merv 13, but also twice the media as most merv 8's on the market (1,560 sq. in) so they do not clog up fast, or create static pressure build up any faster then the typical merv 8. Oh, but they do collect smaller particulate matter MUCH better than any merv 8 on the market (including particulates from wildfire smoke) - which equates to cleaner coils, less work for your motor etc, and FAR better overall air quality in your home. It's a no brainer. My residential HVAC heating/cooling system (Maytag) is close to 20 yrs old. Other than changing out a pressure switch yrs ago, not a single issue.
I change the 3M 1900 every 4-6 weeks in summer, 8 weeks when snow is on the ground.
How can you say that the cheapest air filter is the wrong air filter without justifying with facts. I have been using the cheap filter for 27 years and my system works and runs just fine. The problems with the higher rated filters is that they restrict air flow to the point that it takes a toll on the fan motor and it restricts the flow of heating and cooling to the furthest points within your home, not to even begin to mention the condensation issues that are caused with the heavier thicker higher fern rated filters.
That is true but that’s why a lot of Techs in an HVAC forum I’m in as well as the Tech that services my home recommends a MERV 5-8 filter versus the see-thru fiberglass filters (MERV 2) barely catching anything except large particles and hair. Dust goes thru it. You may be in a cleaner environment but some folks are in dusty environments and dust can collect on the coils.
Don’t use the high MERV pleated filters-- but the basic MERV 7/8 pleated filters are fine - they only have bit more air flow resistance than fiberglass filters. The Home Depot HDX FPR 5 filters are cheap - 3 pack for $12.96. And change frequently every 30-60 days.
I think MERV 13 is too restrictive.
I think I heard you say with more pleats you get more air flow. That is not usually true. It's actually the opposite. When you have more pleats, you have more area compacted and thus more restriction in air flow. I do use the HD FPR5 filters and think they are great for the price at 3 for about $15.
I don't think so, you get more surface area with more pleats. Thanks for watching.
@@OakleysDIYHomeRenovation101Yes, you get more surface area with more pleats which in fact makes it MORE restrictive and you get LESS airflow because of that! It is not too difficult to understand! 😢🥲🤣😅😂🤣🥲
@@naturerules3371 3M filtrete 1900 - merv 13, but also twice the media as most merv 8's on the market (1,560 sq. in) so they do not clog up fast, or create static pressure build up any faster then the typical merv 8. Oh, but they do collect smaller particulate matter MUCH better than any merv 8 on the market (including particulates from wildfire smoke) - which equates to cleaner coils, less work for your motor etc, and FAR better overall air quality in your home. It's a no brainer. My residential HVAC heating/cooling system (Maytag) is close to 20 yrs old. Other than changing out a pressure switch yrs ago, not a single issue.
I change the 3M 1900 every 4-6 weeks in summer, 8 weeks when snow is on the ground.
Should we assume that the filters last for 90 days as the packaging states?
It depends on how much you use your a/c or furnace. Also depends on how air tight you house is. The "leaker" you house the more dirt that is sucked in and the more that goes through the filter. Thanks for watching.
Like #69 hahaha cool.
Also thanks, also wtf home depot...
Glad you liked it. Thanks for watching.
Same HVAC keep air flow will be same even with ANY filter, clean, dirty, any MERV rate. It will be compensate by blow, haw hard blow will work and how many resource and electricity will be used. Filter in HVAC use to clean air to prevent dirty accumulate in system. It is very expensive way to use HVAC to clean air in house. Mach more efficient to use air purifier, most expensive cost hundreds of $, it times cheep compare with HVAC, or it can be DIY for less then $100 by using 4 MERV 13 filters.
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