Is a washable filter worth the higher price?

Over several years it can cost less than replacing disposable filters every one to three months. The $61.99 price at AutoZone as of November 7, 2026 is the upfront cost, and the filter is reusable for the life of the unit under warranty.

What MERV rating is it, and what does that filter?

It is MERV 13. That captures fine particles such as pollen, pet dander, mold spores and smoke, which is why K&N markets it for homes with pets or allergy sufferers.

Wash it with water, let it dry completely, then reinstall it. Putting it back damp can promote mold, so drying fully matters.

Will MERV 13 restrict airflow in my system?

MERV 13 media is denser than basic filters, and K&N says its pleated design maintains quality airflow. If your blower is weak or the system is undersized, check that airflow still feels normal after installing.

What size does it fit?

It is 20 x 24 x 1 inches, a common furnace and return-grille size. Measure your existing filter slot before ordering, since the nominal size can differ slightly from the actual filter dimensions.

Prices vary by store and season. Our agent tracks the price history across the three stores listing it and can tell you whether $61.99 is near the recent low.

Where is the K&N HVAC Filter 20 X 24 X 1 Merv 13 cheapest?

At AutoZone, for $61.99, as of our latest check.

Where can I buy the K&N HVAC Filter 20 X 24 X 1 Merv 13?

12 stores we checked sell it, including AutoZone, Motoroso, PETER'S CAR PARTS, Auto Addict USA, Mexico Racing League.

K&N HVAC Filter 20 X 24 X 1 Merv 13

Best price now

$61.99at AutoZoneObserved at 9:51 PM

Compared across 3 stores. Prices are checked against each store and labelled with when.

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Our take on the K&N HVAC Filter 20 X 24 X 1 Merv 13

This is a 20 x 24 x 1 inch furnace filter from K&N with MERV 13 pleated synthetic media. Unlike disposable filters, it is washable and reusable, and K&N backs it with a limited lifetime warranty for the life of the HVAC unit. MERV 13 captures fine particles such as pollen, pet dander and smoke, which suits homes with pets or allergy sufferers. The best new price is $61.99 at AutoZone as of November 7, 2026, with three stores listing it new.