Pull your current filter and read the small "actual size" print on the frame, or check the model/part number stamped on your filter-cabinet door. Match the depth — 4⅜″, 4¾″, 4⅞″, or 5¼″ — to the chart above. Two quick tips: many of these print "20x25x4" on the box even though they're sold as 20x25x5 (Carrier's own FILXXCAR0020 does this), and depth is the number that actually separates the classes. For the full walkthrough, see our 20x25x5 buyer guide.
Choosing a MERV rating
At 5-inch depth the usual airflow tradeoff mostly disappears — the deep pleats spread air across so much media that you can choose MERV by air-quality need, not by fear of choking your blower. MERV 8 is a solid baseline; MERV 11 suits pets and mild allergies; MERV 13 handles bacteria, smoke, and finer allergens; and MERV 16 gives the highest capture with barely any airflow penalty in a 5-inch cabinet. Every filter here lists its actual dimensions so you can match your cabinet before ordering — with savings up to 40% versus OEM-branded filters, and USA-made compatibles for discontinued lines like Skuttle.
Frequently asked questions
Are all 20x25x5 filters the same size?
No. The 20x25x5 label covers several actual sizes — 4⅜″ (Lennox, Honeywell, Carrier/Bryant), 4¾″ (Ultravation), 4⅞″ (Trion Air Bear, Skuttle, GeneralAire), and an oversized 5¼″ (Goodman, Amana, Five Seasons, Totaline, Electro-Air). Match the actual size on your old filter or the part number on your cabinet, not just the 20x25x5 label.
Which 20x25x5 fits a Carrier or Bryant cabinet?
The shallow 4⅜″ filter. It's sold as the box filter FILXXCAR0020 / FILXXCAR0120, the universal FILXUMC082025, or the EZ Flex kit (EXPXXFIL0020, EXPXXUNV0020, or EXPXXLMC0020) — all the same filter in different formats.
Does a higher-MERV 20x25x5 filter reduce airflow?
Not meaningfully in a 5-inch cabinet. The deep pleats keep even MERV 16 low-resistance, so you can choose MERV by air-quality need. The airflow warnings you usually see apply to thin 1-inch filters.
USA-made. 4,156+ reviews. Fast shipping. Not sure which cabinet you have? Call us or start with the whole house air filter guide.
