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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

All Air Filters

Every Ironside filter in one place: pleated, electrostatically charged HVAC and furnace filters in every standard size and every rating from MERV 6 to MERV 16, plus activated-carbon options for odors. All made in the USA and shipped flat-rate nationwide — same shipping on 1, 2 or 3 packs.

Browsing 1,400+ filters is the hard way. Use Find My Filter to jump straight to your size, or shop by protection level: Everyday Defense (MERV 6–8), Allergy & Pet (MERV 10–12), Maximum Protection (MERV 13–16), or Odor & Smoke (activated carbon).