18x18x4 MERV 11 Pleated Air Filter

Actual Size: 17.5x17.5x3.75"

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New look, same great filter

We’re updating the “look” of our filters.
While we do, your air filter will be the correct size & performance, but may look different than the image above. Learn more

Merv 8

Standard

Merv 11

Superior

Merv 13

Optimal

$141.30

$267.90

in stock

Ships in 24 hours

Quantity Discount

1 for$44.65 ea2 for$27.90 eaSave 38%3 for$26.51 eaSave 41%4 for$25.80 eaSave 42%5 for$24.67 eaSave 45%6-11 for$23.55 eaSave 47%12+ for$22.37 eaSave 50%

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SUPERIOR AIR FILTRATIONRESIDENTIAL AND/OR COMMERCIAL USEChange Every 3 Months

ABOUT

This is a list 18x18x4 MERV 11 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
Actual air filter size: 17.5x17.5x3.75"
MERV 11 synthetic media (comparable with MPR 1000/1200 and FPR 7) offers superior protection from dust, pollen, pet dander, mold, smog and more by trapping 95% of airborne particles without impacting air flow
High-quality construction means electrostatically charged pleated filter media, reinforced wire backing for structural integrity, and a durable frame to resist heat and humidity
Built to last 3 months. 300% longer than fiberglass models
100% manufactured in the United States and designed with recyclable materials
Learn more about 18x18x4 Air Filters