Best reusable washable furnace filters
Researched by Deal.ai's shopping agent across stores on November 7, 2026. Prices below are today's.
Top pick: MaxMERV9 Washable, Permanent Electrostatic Filter — a true permanent filter rated MERV 9, the strongest filtration here, with low airflow resistance so it won't strain your blower. Best if you want one filter you rinse and reuse for years.
Who the others suit:
- HCY 20x20x1 aluminum electrostatic (MERV 8) — the budget-friendly way in; rigid aluminum frame, easy to hose off.
- AIRCARE Forever Filter (MERV 8) — the most-reviewed option and the widest choice of sizes, so it's the safe pick if your filter size is unusual.
- MEDIA-TYPE permanent filter — for deep media cabinets (thick 2¾–5¾ in slots) and the lowest resistance of the bunch.
- DETONG cut-to-size media — a cheap way to try washable filtration in an odd size.
Check your filter's nominal size before ordering; washable filters need rinsing every month or two.
