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21.5x26x1 – Merv 11

21.5x26x1 – Merv 11
AC Furnace Air Filter
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Product Description

Filter Size: 21.5x26x1A

Actual Size: 21.5x26x1

Actual Size Fraction : 21-1/2x26x1

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Shop 21.5x26x1 Air Filters Online

A properly functioning air filter is a must for any home. Not only do they keep your air clean, but they also help to keep your home’s air conditioning system in tip-top shape. Custom Filters Direct 21.5x26x1 air filters play a key role in protecting your home from dust and other airborne particles. They also have an important impact on your indoor air quality.

The primary purpose of these 21.5x26x1 air filters is to reduce the number of airborne particles that make their way into your home from outdoors. These AC and furnace air filters work by trapping microscopic particles in the pleated material that lines the filter’s interior surface. As these tiny particles pass through the filter’s pores, they are trapped and prevented from entering the air you breathe.

All our air filters are 100% made in the USA with the highest quality material so that you will get great performance even during peak season. The strong build of these air filters helps them last long and avoid dust to reach HVAC coils.

By checking your filters regularly and replacing them every 2-3 months, you can reduce the number of harmful particles entering your home each day. Replacing air filters on time will keep them effective and clean throughout their lifespan. Moreover, it will make your HVAC unit to work efficiently and help you save on energy bills, and avoid costly HVAC repairs.

Select the Right MERV Rating


These AC and furnace air filters are ideal for most common households. MERV filters trap 85% of the particles between 3.0-10.0 microns in size. They have the ability to capture pollen, dust, lint, mold spores, and more.


MERV 11 air filters 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 filers are ideal to use in both commercial and residential environments.


MERV 13 filters provide a greater surface area to capture more than 90% of the airborne particles in the 3.0-10.0 micron range. They will also eliminate 75% of the 0.3-1.0 micron size particles passing through them.

21.5x26x1 Air Filters Delivery Service

Prevent expensive repairs and keep your HVAC working smoothly by installing Custom Filters Direct 21.5x26x1 air filters. These premium filters are easy to order and easy to install. We offer special discounts on bulk orders of air filters. You can use our auto-delivery service by selecting the number of filters you need and the time interval between the deliveries. We will send a pack of new filters at regular intervals. You can also use our one-time delivery option to buy air filters for the whole year at once. So, choose the delivery option that suits your needs and place your order now!