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20.75×21.75×1 – Merv 13

20.75×21.75×1 – Merv 13
AC Furnace Air Filter
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Product Description

Filter Size: 20.75×21.75x1A

Actual Size: 20.75×21.75×1

Actual Size Fraction : 20-3/4×21-3/4×1

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Shop 20.75×21.75×1 Air Filters Online

When you have Custom Filters Direct 20.75×21.75×1 air filters in your home or office, they help prevent allergies, asthma, and other breathing issues. They also help keep out mold and bacteria, which can cause a lot of problems.

Our 20.75×21.75×1 air filters are designed to eliminate more than 90% of troublesome particles including dirt, pollen, bacteria, and other harmful elements. These air filters are easy to install and perform well in residential, commercial, and industrial environments. Whether you have pets at home or are susceptible to allergies and other breathing problems, installing our 20.75×21.75×1 air filters will help you keep the indoor air clean and healthy.

All our air filters are proudly manufactured and customized in the USA keeping the HVAC standards in mind. With time, the filters in your HVAC system get clogged up due to all the dirt they filter. Once the filters get clogged, they don’t let the clean air pass through and affect your HVAC performance.

Custom Filters Direct recommends you to replace your HVAC and furnace filters every 2-3 months. It will help you prevent unnecessary damage to your HVAC system and save on utility bills.

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


MERV 8 AC and furnace filters will trap 85% of airborne particles/allergens 3.0 -10 microns in size and are specifically designed for standard households.


MERV 11 HVAC filters are more efficient than MERV 8 filters and capable of removing more than 85% of harmful contaminants 3.0 to 10.0 microns and 1.0-3.0 microns in size. These air filters are ideal for households with pets, allergies, or buildings located in areas with a lot of dust.


Our MERV 13 HVAC air filters come with an excellent dust hold capacity to remove over 90% of the particles 3.0-10.0 microns and up to 50% of particles 0.3-1.0 microns in size. These air filters are perfect for those with pets, and severe allergies.

20.75×21.75×1 Air Filters Delivery

Indoor air can become polluted and unhealthy if air filters are not changed frequently. If you want to maintain clean, healthy air in your home or office, you should get new air filters before they get dirty. With Custom Filters Direct’s subscription service, you’ll receive new air filters every month without having to order again and again. Just choose the number of air filters you need and the time interval of delivery, and we will handle the rest. We also offer one-time delivery and great discounts on bulk orders. So, choose the delivery option that suits you and place your order today.