Whole-Home Media● In stock

24×24×4Air Filter

Actual size: 23.5″ × 23.5″ × 3.63″
Fits any 24x24x4 slot or return grille. Order by the size printed on your old filter.

Free shipping $100+
Fit guarantee
Picked by HVAC techs

Choose your protection level

Pack size (bigger packs save more)

24x24x4 · MERV 11 · 2-Pack$75.98$69.99

Or subscribe: $25.99/filter delivered, never think about it again

MERV 11 · 2-Pack

$69.99

Common questions about 24x24x4

What is the actual size of a 24x24x4 filter?+

The nominal size printed on the frame is 24x24x4, but the filter actually measures 23.5" × 23.5" × 3.63". That undercut is intentional, it slides into your filter track without binding. Order by the nominal size printed on your old filter.

Which MERV rating should I pick for a 24x24x4?+

MERV 8 handles everyday dust. MERV 11 is our most popular, it captures pet dander and pollen. MERV 13 adds smoke, bacteria, and virus-carrier capture. When in doubt, call us, a real HVAC tech answers.

How often should I change a 24x24x4 filter?+

Deep-pleat media filters like this 4-inch typically last 6-12 months. Check it at each season change.