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20x40x1 Air Filter Merv 8
20x40x1 AC Filter Merv 11
20x40x1 Furnace Filter Merv 13
20x40x1 Filter Merv 13 Titanium
20x40x1 Filter Merv 10 Carbon

20x40x1 Air Filter

AC Furnace Air Filter 20x40x1-Inches

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Product Description

Item Model Number: FKFB20X40
Brand: Filter King
Filter size: 20x40x1
Actual Size: 19.5 x 39.5 x .75
1-Inch Filter
MERV 8 Filter Rating
Protection From: Pollen, Dust, Mold, Dust Mites, Bacteria, Pet Dander, Smoke, Viruses
Residential / Commercial Use

Manufactured in the US

20x40x1 Air Filter

Filter King 20x40x1 size air filters are tools necessary to keeping the air pumped in by your home systems clean. The air filters consist of a tight mesh weaving designed to capture allergens and pollutants, while airflow goes through. The cleaned up air will cycle into your home and cycle through its room, raising indoor air quality. Without the filters, your home is subjected to any number of allergens and pollutants in the surrounding air. Your air filters will continuously clean out incoming airflow, but they become dirtier in the process.

Dirty air filters cause several problems to develop for their systems, and only become dirtier over time. Eventually, the dirty filters in your home will also begin to affect the entire household as they block incoming airflow. Without fresh air to cycle into your home, it will face issues of dryness and stagnation. Your air systems also have problems as they try to push airflow through the blockage. The effort will lead to possible mechanical damage and a rise in energy billing over time.

Your home systems work best when they have fresh, clean air filters installed and cleaning passing airflow. Filter King offers new 20x40x1 size air filters ready for order and capable of installation upon arrival. We offer a premium delivery service, orders of two or more are shipped for free. With our subscription option you could have new filters arrive at your home as often as monthly. Filter King model filters rate as an eight on the MERV (Minimum Efficiency Reporting Value) scale. This means that they filter out particles like:

  • Pollen
  • Dust
  • Mold
  • Dust Mites
  • Bacteria
  • Pet Dander
  • Smoke
  • Viruses

20x40x1 Furnace Filters

Your furnace air filters are necessary to keep the heated airflow passing through the system clean of irritants. When the furnace air filters in your home become dirty they cause the regular problems with blocked airflow and loss of fresh air. They also cause additional issues since the heated airflow begins to build up and internal temperatures to rise. If not replaced, the dirty air filters may cause mechanical damages and a rise in energy billing for your home. Order new air filters now and enjoy air coming in without problems throughout your home.