K&N 12x20x1 HVAC Furnace Air Filter, Lasts a Lifetime, Washable, Merv 11, the Last HVAC Filter You Will Ever Buy, Breathe Safely at Home or in the Office, HVC-11220

I've slowly replaced every filter-based system with these K&N Home filters. HVAC? Replaced. PC? You betcha, I replaced a side panel on my Lian Li O11 Dynamic with one and can now run a positive pressure system, so dust can't get in .. so nice (if you're curious, I selected that beefy case just for this as the extra width and internal 3x120fan bay allow for this type of filtration once you seal up the inner-wall). Home Theater cabinet? Yep! Air purifier? I jerry-rigged that too and so far, my neighbor hasn't noticed his box fan missing.Are they a tad expensive? Yeah, but the amount of use you're getting out of them is pretty high and they come in cheaper than many of the other "washable" aluminum filters. Out of all "washable" filters I've tried, these function pretty dang well -- and cleaning is a synch. No, you don't need their filter cleaner, you can use some diluted degreaser (dishwashing soap works) in a spray bottle, spray that on, and let it soak, then wash it out (opposite of the airflow, so the dust collecting side is down). Use a flashlight or ceiling light to see through to gauge the cleanliness, more light = more clean .. science!But let's talk fit and performance.Fit:- They're a tad undersized, so you'll want to get some gasket material to make sure you get a good seal.- They come in only (at the moment) 1x# sizes (more like 3/4"), but I hope they will introduce 2" and 3" sooner than later.Performance:- Air flow is surprisingly high with these, higher than a normal comparable fabric/paper filter, and way higher than one rated at this spec.- They have a very high pleat count, so that maximizes the surface area to allow for better airflow.- Static pressure was also better in comparison during my tests.- My HVAC blower got "quieter" running 1x25" filters versus the 2x25" disposable fabric-based ones I had in it before.- Be cognizant to keep them maintained and washed for best performance.I haven't finished my round of additional testing (lack the right meter) to see the particle size that gets through these, but I will say that since switching to them about 6 months back, all I find in the house is a very fine dust -- I'm planning additional tests to see if that is just residual dust in the system (~16 years worth) that is working free.

First reason, would have to be the obviously answer of K&N’s great track record of manufacturing a high quality, washable, reusable, lifetime filters with these home HVAC filters being no different.Second reason would have to be the washable/reusable feature of said filter. I know I already mentioned this in “R. #1” however there aren’t many companies that make reusable HVAC filters to begin with but to be made with such a quality driven method makes all the difference!And for my third, and final reason, I have to mention the fact that these filters have a MREV rating of 11! That is wild considering you’ll pay the more than the cost of this filter for MERV 5 filters for the year. I highly recommend getting this filter(s) for your home it’s definitely made a difference!P.S.I have two animals (1 dog and 1 cat) and I’ve noticed a difference in air quality.

Great filter unfortunately I had to return because I forgot to measure the closet door size🤦‍♀️🤦‍♀️🤦‍♀️ the air handler is in the closet and there’s plenty of room once you get past the door to install a 24x24 filter, but the door is only 20” so I could get the filter to go in since it’s rigid.

We have I think 16 HVAC units of varying sizes and shapes. Getting suitable replacement filters is difficult and in the long run expensive.These washable filters perform well, even after multiple washes, fit as described (assuming your filter slot is accurate and undamaged) and are sturdy enough not to deform under airflow.Unlike other sponge or mesh type washable filter, these still perform (Merv 11) and don't fall apart the first time you try and wash them. Neither do they require a support frame to hold them in place.Definitely recommend - They'll pay for themselves very quickly.

I'd like to fact that it is reusable, This and will be caused saving in the end. It did not fit tight therefore it drops down on the cover or the grate. But when the air comes on, it sucks up in the hole and does its job. I can hear it when it does it but I can deal with it.