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Find Your Filter.

Check the size printed on the cardboard edge of your old filter, then match it below.

Width

Length

Depth

Not sure of your size? Most homes use 16x25x1 or 20x25x1.

OR SHOP BY PROTECTION

Everyday DefenseMERV 6–8 · dust, lint, pollen Allergy & PetMERV 10–12 · dander, mold, allergens Maximum ProtectionMERV 13–16 · smoke, bacteria, wildfire Odor & SmokeActivated carbon · cooking, pets, VOCs

Maximum Protection

Maximum Protection is our hospital-grade tier: pleated, electrostatically charged MERV 13–16 air filters that capture smoke and wildfire fine particles, bacteria, virus carriers, and the smallest allergens. MERV 13 is the sweet spot for most homes that want serious filtration; MERV 14–16 push into hospital territory and perform best on newer systems with strong blowers.

Every filter is made in the USA and ships flat-rate nationwide — same shipping on 1, 2 or 3 packs. Not sure of your size? Use Find My Filter to match the size printed on the cardboard edge of your old filter. Mainly fighting dander or pollen? Allergy & Pet (MERV 10–12) is easier on airflow. Battling odors too? See Odor & Smoke (activated carbon).