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19.75x21x1 Air Filter Merv 8
19.75x21x1 AC Filter Merv 11
19.75x21x1 Furnace Filter Merv 13
19.75x21x1 Filter Merv 13 Titanium
19.75x21x1 Filter Merv 10 Carbon
19.75x21x1 Filter Merv 8 Carbon 19.75x21x1 Filter Merv 8 Carbon
Protects All Against
  • Pollen protection
  • Dust protection
  • Mold protection
  • Dust Mites protection
    Dust Mites
  • Bacteria protection
  • Pet Dander protection
    Pet Dander
  • Smoke protection
  • Viruses protection
  • Cooking Smoke protection
  • Odor protection
  • Smog protection
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19.75x21x1 Air Filter

AC Furnace Air Filter 19.75x21x1 -Inches

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Odor Eliminator

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Product Description

Item Model Number: FKFB19.75X21A
Brand: Filter King
Filter size: 19.75x21x1
Actual Size: 19.75 x 21 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

Why Buy Air Filters From Filter King?


In comparison to fiberglass filters, 19.75x21x1 pleated air filters are at least 20 times more effective. All Filter King air filters are made in the US.


Filters frames are made out of heat resistant paperboard with horizontal grid supports. Able to withstand temperatures of up to 200° F and resistant to moisture, the paperboard frames do not support microbial growth and outperforms traditional cardboard frames.


Chemical free, electrostatically charged synthetic polyester media is pleated, maximizing the surface area, to capture a high number of airborne particles as small as 0.3 microns with low air flow resistance. To increase durability, the media is supported with a corrosion resistant steel wire.

19.75x21x1 Air Filter Reviews

What MERV Rating should I choose?

How Often to Change Your 19.75x21x1 Air Filter?

Filter King AC & furnace filters aren’t the typical fiberglass filters that need to be replaced every 30 days. Our filters can typically be used for 3 to 5 months before requiring to be changed. Naturally, a variety of things influence filter lifespan.

Some of the factors that influence your filter’s life include outdoor air quality, whether pets are in the home, and how well your HVAC system is maintained.

Your air filter becomes clogged over time by trapped particles, preventing airflow. The efficiency of the HVAC filter declines. Your system must work harder to heat and cool your home. The extra strain on the HVAC system causes higher energy bills. Regular home air filter replacements can prevent expensive system repairs or replacements down the road.

You should change your filter more frequently if you notice:

  • Household dust build-up
  • The air isn’t cooling as is used to
  • There’s more dust near the air vents
  • A dirty filter surface
  • Higher energy bills
  • Burning smells near your HVAC system.

19.75x21x1 Air Filter

Filter King 19.75x21x1 air filters are a part of the necessary filtration process that clean up incoming airflow. The process is necessary for a reason, airflow pumped in by your system is fresh but not always clean. The air surrounding your home may have allergens and pollutants that are able to make your home unsafe or uncomfortable when brought inside. The filters capture these particles in a tight mesh weaving that also allows clean airflow to pass and raise indoor air quality. Over time, the air filters will continue to clean airflow, but they will become dirty themselves in the process.

Your air filters become less effective over time as the particles they have captured begin to build up over time. Dirty air filters are not able to allow air to pass through easily, which means that there will be problems with the air inside when it is unable to cycle out of your home. Without fresh airflow, the air inside of your home will begin to stagnate and dry out over time. Your air systems also face issues where the dirty air filters in your systems cause mechanical issues and a rise in energy billing over time.

Your air filters require consistent maintenance in order to keep airflow coming in and reduce unnecessary billing. Filter King 19.75x21x1 size air filters are in stock and ready to help keep your home irritant free. We are able to deliver the replacements right to your door, regularly if you choose to use our subscription option. Our filters have a MERV (Minimum Efficiency Reporting Value) rating that showing their effectiveness at cleaning airflow. Filter King air filters have a MERV rating of eight, which means they are able to block irritants like:

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

19.75x21x1 Air Filter Delivery

Filter King air filters fit into accommodating furnace systems to keep incoming heated airflow clean. When the furnace filters in your system become dirty, the resulting issues may cause serious problems over time. As the heated airflow becomes blocked, then that leads to temperature problems throughout your home. Order your filters today and help keep airflow coming in smoothly throughout your home.