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20x21x1 Air Filter Merv 8
20x21x1 AC Filter Merv 11
20x21x1 Furnace Filter Merv 13
20x21x1 Filter Merv 13 Titanium
20x21x1 Filter Merv 10 Carbon

20x21x1 Air Filter MERV 8

AC Furnace Air Filter 20x21x1 -Inches MERV 8

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Odor Eliminator

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Product Description

Item Model Number: FKFB20X21A
Brand: Filter King
Air Filter size: 20x21x1
Actual Size: 20 x 21 x .75
1-Inch Filter
MERV 8 Air Filter Rating
Protection From: Pollen, Household Dust, Mold Spores, Dust Mites mold, Bacteria, Pet Dander, Smoke, Viruses
Residential / Commercial Use

Manufactured in the US

20x21x1a Air Filter Reviews

20x21x1 Air Filter

Filter King 20x21x1 size air filters are used by your air systems to protect your home by cleaning out incoming airflow. Your air systems will constantly bring air inside, but there is no way for them to be able to tell the clean air from the dirty. Pleated air filters are installed so that all the air passing through has any traveling microscopic particles captured and absorbed in the tight mesh weaving. The process is necessary to keep your home’s indoor air quality up, but the air filters become dirty in the process. Dirty air filters are covered in airborne particles and present a clear problem for your home.

The pleated air filters in your home are necessary tools, but they become an issue when they become dirty. Dirty air filters become covered in the particles they have absorbed or captured, which makes it hard for air to pass through. When airflow has a problem making it into your home, the air inside is unable to cycle out leading to dryness and stagnation. Your air systems become strained as they try to push airflow through the blockage, resulting in mechanical damage and a rise in energy billing over time.

The pleated air filters in your home require regular maintenance to keep airflow coming in fresh and clean. We offer 20x21x1 size air filters at affordable prices that are usable upon arrival at your home. We also have a subscription option to have your orders delivered as often as monthly, orders of two or more pleated air filters are shipped out for free. Our air filters have a MERV rating (Minimum Efficiency Reporting Value) of eight, eleven, or thirteen and block particles like:

  • Pollen
  • Household Dust
  • Mold Spores
  • Dust Mites Mold
  • Lint Dust
  • Bacteria
  • Fine Dust
  • Pet Dander
  • Smoke
  • Viruses

20x21x1 Furnace Filters

The furnace filters in the system work as they do in any other home air system, cleaning airflow and keeping it clean before it enters your home. The pleated air filters will continue to clean out the heated airflow over time, but they become more and more dirty over time. Dirty furnace air filters block heated airflow, which leads to problems with temperatures over time. The furnace may become damaged and the air inside your home may face temperature fluctuations

We have in stock many filter sizes. Even if you have an HVAC unit that has an unusual filter size, you can order a custom size new filter with us. Purchase new filters today to help keep airflow coming in without issue.