Aprilaire 413 Air Filter for Aprilaire Whole Home Air Purifiers, MERV 13 (Pack of 1)

I bought this as a less expensive option, compared to the filter that is sold by the company that installed my furnace, the KMRF001 filter. It fits great! There seems to be a little bit more room after this filter is installed, compared to the original one from the furnace installer, but it still works great, and it's easy to install. The quality of this filter is very good, and it does a great job of keeping dust particles out of the air. My wife is very sensitive to dust, and there was a noticeable improvement with the air quality in our house after installing this filter.

Fits my Carrier unit from Coolray. Durable, sturdy, worth the price. Cheaper than going through our maintenance plan,

I got the 4-pack, much better price per filter than buying one.

Not as expensive as the name brand and works fine, good enough for me.

Grabbed the two-pack when the old 413 was due for swap, and these are genuine - solid frame, slid into the housing exactly like the original with no trimming or forcing, and the pressure reading on my unit hasn't budged, so no air is sneaking around the edges. Two and a half months in, no change in house air quality or system behavior. Buy the genuine listing, not a marketplace one; the "used filter" complaints in the reviews are about sellers, not this product.