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21.5x24x1 – Merv 11

21.5x24x1 – Merv 11
AC Furnace Air Filter
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4-5 $0.00
6-11 $0.00
12+ $0.00

Product Description

Filter Size: 21.5x24x1A

Actual Size: 21.5x24x1

Actual Size Fraction : 21-1/2x24x1

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Order 21.5x24x1 Air Filters Online

The air in your home is filled with a lot of different things: dust, pollen, pet dander, and bacteria. When you breathe in, these particles can get into your lungs and create an environment that is not healthy for your body. The result? Allergies and other health conditions, including asthma.

In order to maintain indoor air quality, it’s important to invest in quality 21.5x24x1 air filters. Our air filters come with synthetic media and a high surface area to catch even the smallest particles in the air.

In addition to the allergens in the air, Custom Filters Direct air filters also eliminate many harmful chemicals that are present in household items such as paints, cleaners, and furniture. These can be harmful if they aren’t properly removed from the air.

To maintain healthy indoor air quality, we recommend you change your AC and furnace filters every 60-90 days. It will help you get rid of accumulated dirt and debris from the air that passes through the filters. This helps keep filters working at peak efficiency and ensures that they will be able to trap as much debris as possible.

Select the Right MERV Rating


These AC and furnace air filters effectively trap 85% of particulates so that you can breathe in a clean and healthy environment. MERV 8 filters capture mold spores, dust, pollen, and other airborne particles.


These air filters are more efficient than MERV-8 air filters as they catch more than 85% of particles ranging between 3.0 to 10.0 microns and 50% of the particles 1.0 to 3.0 microns in size. MERV 11 filters trap dust, pet dander, lung-damaging allergens, auto emissions, smoke, and other allergens.


These air filters capture more than 90% of particles between 3.0 to 10.0 microns and will also capture 75% of the 0.3-1.0 microns size particles.

21.5x24x1 Air Filters Delivery Service

Your HVAC doesn’t have to work as hard when you change air filters on time. Save as much as on your heating and cooling bills by choosing Custom Filters direct premium 21.5x24x1 filters. We offer a subscription service, so you will never forget to replace your air filters again. You can also choose our one-time delivery option and save huge money on 21.5x24x1 air filters. Place your order now!