Filterbuy 21x22x1 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 20.50 x 21.50 x 0.75 Inches)

It’s so hard finding filters for my AC. I now purchase and replenish my supply here. What’s great is that it is delivered to my door and I can purchase in bulk. The product works well and is very sustainable.

I wish I was told.... I purchased 4 air filter special size 21"x22"x1" from Amazon (Filter Buy) but instead I received 201/2"x21""x3/4"....a completely different size that what my unit requires.....See the picture, the package has the two measures, so, what size do I need to buy to get what I need.... I though I was getting the right size and took the old one and throw in garbage together with the shipping package and now the new one does not fit at all... to small and it goes to the floor because it will not reach to support itself to the edges of the unit..... VERY BUT VERY DESAPOINTED!!... now, I have to run my unit without any filter till Monday morning and run to purchase them locally.... what a mistake... never again....and i though i was saving...and will end up paying more!!!My old filter measures exactly 21x22x1 and fits perfectly!!! ..... Never had any issues with it..Just threw my money away....

These are fine. Comparable to others in my view. This size is unique, which is good. The filters are as easy to install as any; with my system, this is not easy, though it is not the filter that is an issue.

this was a better fit than the typical sizes available at the big box stores. they generally only stock the conventional sizes like 16x20 and so on. these out of the ordinary sizes are not available in your local box stores. looks like a decent built filter so we will test it for 4 months changing every month and see how well odor and dust is controlled inside the house.

This size is difficult to find, but, fortunately, it is available from Amazon or we would be in big trouble. However, the cost is not cheap, so buyer beware: you pay for hard to find