Air Filters and Home Depots Dirty Little Secret - I ...
I use an Aprilaire 1210 media filter installed at the airhandler, with an (upgrade) 213 media kit, with no paper filters at the return air grills. It's a MERV 13, rated at 0.06"w.c. pressure drop at 600cfm. The media is a little pricey, typically $40-50 on line, with free shipping if you buy a couple. They're supposed to be good for a year.
DA: 92 PA: 31 MOZ Rank: 62