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20x40x1 – Merv 11

20x40x1 – Merv 11
AC Furnace Air Filter
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2 $0.00
3 $0.00
4-5 $0.00
6-11 $0.00
12+ $0.00

Product Description

Filter Size: 20x40x1

Actual Size: 19.5×39.5×1

Actual Size Fraction : 19-1/2×39-1/2×1

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Buy 20x40x1 Air Filters Online

The air quality inside your home is not as good as it could be. Particles, bacteria, mold, and dust can all get into the air and make you sick. Custom Filters Direct 20x40x1 air filters can help remove allergens and pollutants from the indoor environment, including pollen and dust mites. They can also help reduce unpleasant smells while improving indoor air quality.

These AC and furnace air filters are made from synthetic media which increases the density and surface area of the filters. This media makes filters more effective when filtering out dust and smaller particles without putting pressure on your HVAC unit.

Overall, these air filters are a great way to improve the quality of your indoor air. They are easy to install and replace to maintain indoor air quality. When your HVAC air filters get clogged, dust and dirt start accumulating on the ducts, causing wear and tear on other components of the unit. The more wear and tear of the components, the sooner you’re dealing with an HVAC motor breakdown. Moreover, the clogged filter also reduces the efficiency to pass the clean air.

Custom Filters Direct recommends you check your air filters regularly and change them after 2-3 months.

Select the Right MERV Rating


These air filters eliminate 85% of the airborne particles ranging between 3.0 – 10.0 from your residential environment. MERV 8 filters capture particles like pollen, dust mites, dust, mold spore, carpet fibers, and more.


These AC and furnace air filters offer amazing air filtration solutions for both residential and commercial environments. MERV 11 filters capture an impressive amount of harmful particles from the air ranging between 1.0 – 10.0 microns.


These air filters provide superior air filtration, ideal for industrial buildings, hospitals, surgery units, and more. MERV 13 filters capture more than 90% of particles ranging between 3.0-10.0 microns and even also trap 75% of particles 0.3-1.0 microns in size.

Reliable 20x40x1 Air Filters Delivery

Need to improve the indoor air quality in your home or office? Custom Filters Direct is your one-stop solution to buying quality 20x40x1 air filters online. We offer a monthly subscription service, so you will never forget to regularly change your home’s air filters. You can also choose the one-time delivery option and get a huge discount on bulk orders. Place your order now!