Save 10%
Fast-Free Shipping * contiguous US - All Sizes
Manufacturer Direct

Air Filter Replacements Made in the USA – Manufacturer Direct

21x21x1 actual sizes

20 3/4 x 20 3/4 x 3/4 (20.75 x 20.75 x 0.75)

21 x 21 x 3/4 (21 x 21 x 0.75)

© 2026 Nordic Pure /Designed by:LaunchUX

Subscribe & Save

Unlock 10% Savings:
Set It & Forget It!

Never worry about running out—
fresh filters arrive at your doorstep right when you need them!!