Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
Advertising Disclosure
10 Best 20x20x4 merv 11 furnaces of 2026
Save up to 13% off
Best Choice1
Clicked 6 times in the last monthFilterbuyFilterbuy 20x20x4 Air Filter MERV 11 Superior Pet & Allergy Defense (6-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 19.50 x 3.63)
9.8Exceptional
-
-
Powerful technology We scan thousands of products and stores, analyzing reviews to find what matters most to users like you
Careful review Our team ensures quality, value, and fit based on real user feedback
Trusted insights AI and human analysis guide your decisions, reflecting real user prioritiesReal users impact
Thousands of users trust our site daily
- Based on millions of stores and reviews
- Shoppers influence our rankings
Analyzing top stores
Value for Money2
AerostarAerostar 20x20x4 MERV 11 - 6 Count - Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Cold & Flu Germs, Lint, Mold, Pet Dander, Allergy-Causing Pollen, Smog & Smoke
Key specs-
size:19.5 x 19.5 x 3.8
-
material:Synthetic Polymer
-
usage:Filter microscopic particles
-
special features:Electrostatically charged
-
merv:11
9.6Exceptional
-
3
FilterbuyFilterbuy 20x20x4 Air Filter MERV 11 Superior Pet & Allergy Defense (6-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 19.50 x 19.50 x 3.63)
9.5Excellent
-
4
ResideoHoneywell FC100A1011-20" x 20" x 4" Pleated Air Filter, MERV 11 Bundle with Same Day Supply Filter Change Reminder (2-Pack)
9.4Excellent
-
5
Wholesalehome20x20x4 Air Filter Replacement MERV 11, FC100A1011 Pleated HVAC AC Furnace Filters with Wholesalehome Cleaning Cloth, 2-Pack (Actual Size: 19.94 x 19.75 x 4.38 Inches)
9.3Excellent
-
-
See Today’s Deals & Prices
6
AerostarAerostar 20x20x4 MERV 11 - 6 Count - Pleated HVAC, Furnace & Air Conditioner Filters - Removes Dust, Cold & Flu Germs, Lint, Mold, Pet Dander, Allergy-Causing Pollen, Smog & Smoke
Key specs-
size:19.5 x 19.5 x 3.8
-
material:Synthetic Polymer
-
usage:Filter microscopic particles
-
special features:Electrostatically charged
-
merv:11
9.1Excellent
-
7
SimplySimply 20x20x4 Air Filter, MERV 11, 2 Pack, Furnace Air Filter for HVAC (Actual Size:19.5"x19.5"x3.63") DUST, Pet, & Allergy Control
9.0Excellent
-
8
FiltreteFiltrete 20x20x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Honeywell, Allergen Defense, Electrostatic Air Cleaning Filter, 2-Pack (actual size 19.88 x 19.88 x 4.31)
8.8Very Good
-
9
FiltreteFiltrete 20x20x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Honeywell, Allergen Defense, Electrostatic Air Cleaning Filter, 2-Pack (actual size 19.88 x 19.88 x 4.31)
13% Off8.6Very Good
-
10
AIRx FiltersAIRX FILTERS WICKED CLEAN AIR. 19x20x4 Air Filter MERV 11 Compatible with Bryant Carrier FNCCAB0021 FILXXFNC-0021 Furnace Filter 2 Pack
Key specs-
size:19x20x4
-
material:Polypropylene, Fiberglass
-
usage:Air Purifier, Air Conditioner, Air Cleaner, Furnace
-
special features:Easy to Install, Dust Collection
-
merv:MERV 11
8.3Good
-
