Filtrete 20x25x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Honeywell & AprilAire Space-Gard, Allergen Defense, Electrostatic Air Cleaning Filter, 4-Pack (actual size 19.88 x 24.63 x 4.31)

3M Filtrete air filters are clearly superior to the competition, in my opinion. They are dimensionally precise and the filter media is superior. Bear in mind that 3M is the long-term standard bearer for HEPA level medical air filtration and masks so they know what they are doing. This purchase was my first of a 4" filter. The filter box on my furnace accommodates both 1" and 4" inserts. I've never thought to try the 4" size since I've used 1" units my whole life, and the 4" filters are very expensive. I switched when I saw that commercial plenum air filters are all of thicker depth. Plus, I now realize that the 4" filters last MUCH longer, reducing the hassles of change-outs. I am sold on 4" filters and 3M Filtrete filters in particular. Highly recommended.

These hvac filters are great. The price was extremely reasonable.They came boxed well and with no damage.The construction is lightweight with a cardboard frame. The filter really does catch a ton of dust and dirt.I’ll definitely purchase more!

Good quality air filter for your home. Buying in the three pack saved me money compared to store price and saves you a trip to the store. Well worth it.

A great price for the filters.

Effective allergen defense! Great fit, strong filtration. Lasts longer than standard filters

Good filter, works as expected. Better value than buying at HomeDepot.

Good buy

Great deal for the price