The 8 Best Furnace Filters of 2021

By The Spruce

Honeywell Elite Allergen Pleated FPR 10 Replacement Air Filter

"Best Overall"

Rheem Basic Household Pleated FPR 4 Air Filter

"Best Budget"

Filtrete Micro Allergen Defense AC Furnace Air Filter

"Best for Allergies"

FilterBuy MERV 8 Pleated AC Furnace Air Filter

"Best for Pets"

Honeywell Superior Allergen Pleated FPR 9 Air Filter

"Best for Mold"

Nordic Pure Pleated MERV 13 AC Furnace Air Filters

"Best for Cigarette Smoke"

Flanders PrecisionAire Nested Fiberglass Filters

"Best Fiberglass"

FiltersUSA Miller Poly Furnace Door Filter

"Best for Mobile Home"