















🌬️ Breathe Better, Live Smarter — Upgrade Your Air Game Today!
Filterbuy’s 20x21.5x1 MERV 11 air filters deliver superior pet and allergy defense with 95% dust capture using electrostatic pleated media. Designed for universal HVAC compatibility, these durable, recyclable filters feature 14 pleats per foot for enhanced filtration and last 3x longer than fiberglass alternatives. Proudly made in the USA, they ensure healthier indoor air with easy installation and reliable performance every 90 days.


















| ASIN | B01N01O0EK |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #435 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #21 in Furnace Filters |
| Brand Name | Filterbuy |
| Color | Gold |
| Compatible Device | Air Cleaner, Air Conditioner, Furnace, HVAC System, Heat Pump |
| Customer Reviews | 4.5 4.5 out of 5 stars (20,037) |
| Date First Available | November 6, 2016 |
| Included Components | Air Filters |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.01 ounces |
| Item model number | AFB20x21.5x1M11pk2 |
| Manufacturer Warranty | Parts |
| Material Type | Aluminum, Plastic, Polypropylene |
| Model Info | AFB20x21.5x1M11pk2 |
| Part Number | AFB20x21.5x1M11pk2 |
| Product Dimensions | 19.88 x 21.5 x 0.75 inches |
| Special Features | Dust Collection, Easy to Install, Removable |
K**R
Good find for random sizes!
I searched high and low for the right size of filter my house is older so it is harder to come by but these were wonderful! Great quality, the airflow is wonderful as well! Best value for the price as the filter functions just as it says and protects your house! My household noticed a difference within 24 hours! We do have a small dog and it works great with her!
S**A
Great choice
Significantly reduces common allergens and particulates compared with standard filters. Good quality, fits perfectly
D**L
it works but not happy with the fit the length is ok
These are not 4" wide , they are 3-3/4" the old one setting next to the new one. I have had these for a few months cause I purchased after I installed my last one so Bought these for replacements when needed . Or else Id return them ! I dded duct tape on one side so It doesnt pull air from around the side
M**R
Good solid product built well
They seem to be working the way they should I went from a merv 8 to the merv 11 but only time will tell, good solid product build.
H**7
Quality at good value
Great filters and best price.
M**M
Good product
Worked as designed.
T**E
True to size. Just as described
These furnace filters are true to size. Perfect fit.
C**E
breathe the cleaner, cooler air at home
My ac air filter has a uncomment size which is 17x20x1. I can't find this size anywhere in the local store. I am glad I found it online and it fits perfectly. This filter's quality is awesome because I can feel the difference without it. it traps most of airborne particles as small as microns, including dust, pollen, pet dander, mold spores, and even some bacteria. Within a week of installing it, I noticed a dramatic difference: less dust on my shelves and furniture, no more sneezing fits when the AC kicks on, and a noticeable reduction in pet odors.
P**L
tres sastisfait
I**N
It does what it says it should filtering the air
I**W
Does a great job of keeping air clean in house
L**R
good value for this product
G**U
Great quality furnace filters, at reasonable price. Delivered to your house
Trustpilot
1 week ago
1 month ago