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20x21x1A – Merv 8

20x21x1A – Merv 8
AC Furnace Air Filter
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Product Description

Filter Size: 20x21x1A

Actual Size: 20x21x1

Actual Size Fraction : 20x21x1

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Shop 20x21x1A Air Filters Online

Air filters are one of the most important components of your home’s air quality. Without an effective filter, your air will be filled with dangerous pollutants, dust mites, and other harmful irritants.

Custom Filters Direct delivers premium quality 20x21x1A air filters that provide great airflow with a higher level of filtration than other ordinary filters available on the market. When your main concern is allergies or having pets in your home, our air filters provide powerful filtration solutions and eliminate the most microscopic allergens and pollutants away from your premises. These air filters not only provide the highest dust holding capacity but also push the fresh, clean air flow throughout your living spaces.

Our AC and furnace air filters are made in the USA and feature with heavy-duty beverage board frame. The strong construction of frames allows the filter to be sturdy against warping and bending during peak seasons and also makes the filter 30 times more efficient than other filters.

Custom Filters Direct recommends replacing your AC and furnace air filters every 2 to 3 months. A dirty filter blocks airflow and causes your HVAC unit to work harder and run longer in order to keep the environment clean and healthy. So it’s necessary to change your air filter frequently.

We have MERV 8, MERV 11, and MERV 13 Air Filters


These air filters maintain indoor air quality by capturing 85% of harmful particles 3.0-10.0 microns in size. They are an affordable solution for standard households.


These AC and furnace filters fit both commercial and residential environments as they capture more than 85% of the particles 3.0 – 10.0 microns in size and 50% of the particles 1.0-3.0 microns in size. These air filters are the perfect choice for homeowners with pets or small kids.


These AC and furnace air filters keep the indoor airflow clean and healthy as they eliminate almost pollutants from the air ranging from 0.3 – 10.0 microns.

Fast 20x21x1A Air Filters Delivery Services

For maximum performance, it’s best to replace the air filters after every 60-90 days. Custom Filters Direct understand the importance of having clean, fresh air in their homes or office. We are committed to delivering top-quality HVAC air filters fast directly to your doorstep. We offer one-time deliveries and recurring subscriptions service. Whatever the purchasing option you will choose, we can significantly reduce your cost per filter. Order now!