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

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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

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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

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18x20x2 MERV 8 AC Furnace 2" Inch Air

By Filters Delivered

USD $33.94

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

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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

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Filters Fast 4" HVAC MERV 11 Air and

By Filters Fast

USD $40.98

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

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FilterBuy 16x25x1, Pleated HVAC AC Furnace Air Filter,

By FilterBuy

USD $21.88

1" Inch Glasfloss ZL MERV 10 Pleated Air Filters for AC & Fu

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1" Inch Glasfloss ZL MERV 10 Pleated Air

By Glasfloss

USD $28.94

Qty 6 Per Box Aerostar Furnace Air Filter 20x20x4 Merv 8 USA

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Qty 6 Per Box Aerostar Furnace Air Filter

By Filter

USD $41.99

Ultravation #91-005 - 16x25x5 - MERV 13 Comparable Air Filte

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Ultravation #91-005 - 16x25x5 - MERV 13 Comparable

By Tier1

USD $64.94

Filtrete Clean Living Basic Dust AC Furnace Air Filter, MPR

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Filtrete Clean Living Basic Dust AC Furnace Air

By Filtrete

USD $39.86

Top 10 Furnace Air Filters Comparison