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21.75×21.75×1 – Merv 8

21.75×21.75×1 – Merv 8
AC Furnace Air Filter
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Product Description

Filter Size: 21.75×21.75x1A

Actual Size: 21.75×21.75×1

Actual Size Fraction : 21-3/4×21-3/4×1

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Buy 21.75×21.75×1 Air Filters Online

Air Filters are essential in any home. They keep the air clean and fresh and also help to prevent dust, pollen, and other allergens from entering the house.

While there are many different types of air filters available on the market, Custom Filters Direct 21.75×21.75×1 air filters are the most popular choice for home and business owners. Our air filters remove more than 90% of pollutants from the air you breathe. The result is a cleaner, fresher and healthier indoor environment.

Custom Filters Direct 21.75×21.75×1 air filters not only maintain superior indoor air quality but also reduces the risk of breathing and lung problems by eliminating harmful chemicals from the air. They will keep your home clean and safe for you and your family by repelling moisture and resisting the support of bacterial and mold growth.

Though the air filters are designed to provide long-lasting filtration, it is important that you change your HVAC filters on a regular basis so that they do not get too dirty while still effectively removing pollutants from the indoor air.

We have MERV 8, MERV 11, MERV 13 Filters


These AC and furnace air filters are an economical way to reduce indoor air pollution in the common household environment. They remove 85% of harmful contaminants that are 3 – 10 microns in size.


These filters provide superior air filtration solutions for both residential and commercial settings. MERV 11 filters capture more than 85% of harmful allergens between 3.0 – 10.0 microns in size and 50% of particles down to 1.0-3.0 microns in size.


These air filters offer a greater surface area to capture almost all allergens ranging between 0.3-10.0 microns. These air filters are ideal for places where superior air filtration is required, like hospitals, healthcare facilities, surgery units, and more.

Quick 21.75×21.75×1 Air Filters Delivery

When choosing the AC and furnace air filter, there are many factors to consider such as cost, shipping frequency, and customer service. Custom Filters Direct premium 21.75×21.75×1 air filters are available at pocket-friendly prices with guaranteed on-time delivery. We offer a subscription service that ensures you will get the pack of air filters every regular interval. We also have a one-time air filter delivery option. Choose any air filter delivery option that suits your needs and enjoy clean, healthy indoor air every day.