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19.5x21x1 Air Filter Merv 8
19.5x21x1 AC Filter Merv 11
19.5x21x1 Furnace Filter Merv 13
19.5x21x1 Filter Merv 13 Titanium
19.5x21x1 Filter Merv 10 Carbon
19.5x21x1 Filter Merv 8 Carbon 19.5x21x1 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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19.5x21x1 Air Filter

AC Furnace Air Filter 19.5x21x1 -Inches

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Odor Eliminator

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Product Description

Item Model Number: FKFB19.5X21A
Brand: Filter King
Filter size: 19.5x21x1
Actual Size: 19.5 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, 19.5x21x1 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.

19.5x21x1 Air Filter Reviews

What MERV Rating should I choose?

How Often to Change Your 19.5x21x1 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.

19.5x21x1 Air Filter

Filter King 19.5x21x1 size air filters are necessary parts of your home air systems, used to keep incoming airflow clean and healthy. The fresh air cycling into your home keeps your home feeling comfortable and safe, but the air pumped in is not necessarily safe. Much of the time, air coming in needs cleaning and filters are able to allow airflow to pass while keeping it free of irritants. Over time, your home avoids pollution but the particles that were blocked begin to build up and cause a problem for your home over time.

The indoor air quality of your home often depends on fresh air coming in, preferably clean and free of allergens and pollutants. When the air filters in a system become dirty then the resulting blockage is a problem for your problem as a whole. Dirty air filters are unable to properly process airflow effectively. The lack of incoming airflow leads to problems with dryness and stagnation throughout your home. Your air systems are also strained as they try to push airflow through the blockage, increasing home energy usage.

The air filters in your home are better clean, helping you avoid unnecessary billing and mechanical damage. Filter King has replacement 19.5x21x1 size air filters available for your home to keep the airflow coming in without issue. We also offer a delivery service, along with a subscription option that has new filters regularly delivered to your home. Our filters come with a MERV (Minimum Efficiency Reporting Value) rating that shows their how effective they are at cleaning airflow. Filter King air filters have a MERV rating of eight, and are capable of blocking out irritants like:

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

19.5x21x1 Air Filter Delivery

Filter King air filters are able to fit in the average home’s air systems and provide freshly clean airflow. The heated air passes through the filters before being distributed. When your furnace filters are dirty then that leads to problems where heating fluctuates causing mechanical damage for the systems and discomfort in the home. Heated airflow is best kept coming in naturally without any problems, so order new air filters today to keep the air coming in without issue.