3 Inch Furnace Filters

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Home Furnace Filters & Parts Furnace Filter Sizes 3 Inch Furnace Filters
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Home Furnace Filters & Parts Furnace Filter Sizes 3 Inch Furnace Filters

3-inch furnace filters are less common, and most are made for one brand's filter cabinet. This collection covers Carrier PGAPXCAR, Lennox X0581, X5422 and X5423, GeneralAire 4521 and an FG Aerostar Green Pleat for Trion and Air Club cabinets. Match the part number on your current filter.

Need another thickness? See 2 inch or 4 inch furnace filters, or all furnace filters. Our filter size guide explains nominal and actual sizes.

Carrier PGAPXCAR1625 MERV 13, 16x25x3 Replacement Filter (Discontinued, Replaced by AGAPXCAR1625)
Carrier PGAPXCAR1625 MERV 13, 16x25x3 Replacement Filter (Discontinued, Replaced by AGAPXCAR1625)
$238.75
Lennox X0581 - BMAC 16x25x3 MERV 11 Furnace Filter
Lennox X0581 - BMAC 16x25x3 MERV 11 Furnace Filter
$59.50
GeneralAire / Reservepro 4521 MERV 8 16x25x3 Furnace Filter
GeneralAire / Reservepro 4521 MERV 8 16x25x3 Furnace Filter
$45.25
Carrier PGAPXCAR2025 MERV 13, 20x25x3 Replacement Filter
Carrier PGAPXCAR2025 MERV 13, 20x25x3 Replacement Filter
$226.75
Carrier PGAPXCAR1620 MERV 13, 16x20x3
Carrier PGAPXCAR1620 MERV 13, 16x20x3
$329.75
Lennox X5423 - 16x26x3 MERV 11 Furnace Filter
Lennox X5423 - 16x26x3 MERV 11 Furnace Filter
$86.50
FG IAQ Aerostar Green Pleat Filter, 16" x 25" x 3", MERV 13, Trion & Air Club Replacement
FG IAQ Aerostar Green Pleat Filter, 16" x 25" x 3", MERV 13, Trion & Air Club Replacement
$156.00
Lennox X5422 Pleated Filter, 26" X 20" X 3", Merv 11
Lennox X5422 Pleated Filter, 26" X 20" X 3", Merv 11
$86.50
Carrier PGAPXCAR2420 MERV 13, 24x20x3 Replacement Filter
Carrier PGAPXCAR2420 MERV 13, 24x20x3 Replacement Filter
$249.75