Filterbuy 18x21x1 Air Filter MERV 13 Optimal Defense Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 18.00 x 21.00 x 1.00 Inches)

Actual Size: 18x21x1

https://static.filterbuy.com/static/images/filter-images-by-shape/Short Rectangle/MERV 13/1 INCH/ShortRectangle_1inch_MERV13_6pack.jpg

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

$108.30

$226.74

in stock

Ships in 24 hours

Quantity Discount

1 for$37.79 ea2 for$22.97 eaSave 39%3-4 for$21.76 eaSave 42%5 for$19.29 eaSave 49%6-11 for$18.05 eaSave 52%12+ for$16.75 eaSave 56%

Save 5% With Auto Delivery

OPTIMAL AIR FILTRATIONRESIDENTIAL AND/OR COMMERCIAL USEChange Every 3 Months

ABOUT

This is a list 18x21x1 MERV 13 air filter replacement for your furnace, air conditioner, heat pump, or HVAC system
Actual air filter size: 18x21x1
MERV 13 synthetic media (comparable with MPR 1500/1900 and FPR 10) offers the best protection from dust, pollen, pet dander, mold, smog, bacteria, and virus carrying particles by trapping 98% 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 18x21x1 Air Filters