Accumulair Platinum 20x21.5x1 (Actual Size) MERV 11 Air Filter/Furnace Filters (4 pack)

These filters are absolutely fantastic. We had a mold problem in our attic, which was being circulated throughout the house by the air conditioning system. We were all sick... constantly, it seemed. These air filters made a huge difference (in addition to getting some English Ivy plants). It's rare to find this size too. The regular retailers just don't seem to sell air filters of this size, so you end up getting filters that are too small. Doing so causes your air conditioner coils to get dirty, reducing the air flow and efficacy further.

I had originally ordered a 20x21.5x1 air filter from another company. When it came it was smaller. This company gives you the size you ask for, not a half size smaller. I highly recommend these air filters.

fulfills my previous and future needs in every way

Sized just as expected. Very good quality. Will update in a few months after I have some usage history. For now, they fit just like the OEM Trane versions for our A/C.

The filters arrived quickly and were just what we needed. We have a strange size and I was happy to find them.

I bought these before they're really nice they do the job. Came back for more.

I have used these filters for many years and am very pleased with the quality and price. They are especially useful if you need an irregular size. My only issue is that the cardboard could be a little stronger. Not a major issue though.

As expected, fast shipping

First order, looks good and it fits which was the most important things for an online order!