Best Furnace Air Filters 2021

We inspected 9 distinguished 2021 furnace air filters over the past year. Discover which furnace air filters is best. Filter by brand including Filtrete, Nordic Pure and Accumulair or by category such as Home & Garden, Tools & Home Improvement and Home Improvement.

20x20x1 MERV 8 Pleated AC Furnace Air Filters. 6 Pack

(3)

20x20x1 MERV 8 Pleated AC Furnace Air Filters.

By Filters Delivered

USD $29.94

18x20x2 MERV 8 AC Furnace 2" Inch Air Filter - 4 PACK

(3)

18x20x2 MERV 8 AC Furnace 2" Inch Air

By Filters Delivered

USD $29.80

18x20x2 MERV 8 AC Furnace 2" Inch Air Filter - 4 PACK

(3)

18x20x2 MERV 8 AC Furnace 2" Inch Air

By Filters Delivered

USD $33.94

Filtrete Basic 3M AIR FURNACE FILTER White Pleated - 3 PACK

(1)

Filtrete Basic 3M AIR FURNACE FILTER White Pleated

By Filtrete

USD $20.99

Filters Fast 4" HVAC MERV 11 Air and Furnace Filters 3-PACK

(1)

Filters Fast 4" HVAC MERV 11 Air and

By Filters Fast

USD $40.98

FilterBuy 16x25x1, Pleated HVAC AC Furnace Air Filter, MERV

(3)

FilterBuy 16x25x1, Pleated HVAC AC Furnace Air Filter,

By FilterBuy

USD $21.88

Aprilaire 413 Air Filter for Aprilaire Whole Home Air Purifi

(1)

Aprilaire 413 Air Filter for Aprilaire Whole Home

By Aprilaire

USD $45.00

Trion Air Bear 255649-102 Pleated Furnace Air Filter 20"x25

(1)

Trion Air Bear 255649-102 Pleated Furnace Air

By Trion Air Bear

USD $59.93

20x25x4 MERV 8 Pleated AC Furnace Air Filters. 2 Pack

(2)

20x25x4 MERV 8 Pleated AC Furnace Air Filters.

By Filters Delivered

USD $31.98

20x25x1 Merv 13 Pleated AC Furnace Filters. 6 pack, Captures

(1)

20x25x1 Merv 13 Pleated AC Furnace Filters. 6

By SFP Filters

USD $34.99

Merv 11 Pleated AC Furnace Filters. Made In the USA. Case of

(3)

Merv 11 Pleated AC Furnace Filters. Made In

By AF

USD $29.99

20x20x1 Merv 13 Pleated AC Furnace Filters. Case of 12 Capt

(1)

20x20x1 Merv 13 Pleated AC Furnace Filters. Case

By SFP Filters

USD $62.90

20x25x4 MERV 11 Pleated AC Furnace Air Filters. 2 Pack

(3)

20x25x4 MERV 11 Pleated AC Furnace Air Filters.

By Filters Delivered

USD $36.98

PERMANENT WASHABLE ELECTROSTATIC FURNACE AC AIR FILTER Dust

(1)

PERMANENT WASHABLE ELECTROSTATIC FURNACE AC AIR FILTER

By Filter Everything

USD $16.99

Filtrete-Basic Air-Filter Pleated Furnace Replacement Pad Du

(1)

Filtrete-Basic Air-Filter Pleated Furnace Replacement Pad Dust Pack

By 3M Filtrete

USD $11.10

Top 10 Furnace Air Filters Comparison