All filters are made in the USA + Free Shipping on orders over $50

Call Us C877.570.9755

19.75x21.5x1 Air Filter Merv 8
19.75x21.5x1 AC Filter Merv 11
19.75x21.5x1 Furnace Filter Merv 13
19.75x21.5x1 Filter Merv 13 Titanium
19.75x21.5x1 Filter Merv 10 Carbon
19.75x21.5x1 Filter Merv 8 Carbon 19.75x21.5x1 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
{{ filter_count }} Pack of

19.75x21.5x1 Air Filter

AC Furnace Air Filter 19.75x21.5x1 -Inches

1. Select Filter Quality

Odor Eliminator

2. Select Quantity

${{ money(priceWithoutDiscount()) }} Save ${{ money(savePrice()) }} ({{ savePercent()}}%)


Product Description

Item Model Number: FKFB19.75X21.5A
Brand: Filter King
Filter size: 19.75x21.5x1
Actual Size: 19.75 x 21.5 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

Why Buy Air Filters From Filter King?


In comparison to fiberglass filters, 19.75x21.5x1 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.

19.75x21.5x1 Air Filter Reviews

What MERV Rating should I choose?

How Often to Change Your 19.75x21.5x1 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.

19.75x21.5x1 Air Filter

Filter King 19.75x21.5x1 size air filters are important parts of your home air systems, they clean airflow as the system pumps it in. Fresh air cycles into your home to prevent dryness and stagnation, when this process stops your entire home is affected. The indoor air quality of your home determines its safety and comfort. New air filters will help keep incoming airflow clean but in the process, become dirty themselves. Dirty air filters create a blockage that is difficult for airflow to pass, which in turn creates problems throughout your home.

The air filters in your home systems cleanse allergens and pollutants from passing airflow, keeping them from polluting your home. Over time, the air filters become covered in the incoming particles which leads to a blockage in the system. Allergens and pollutants are still unable to pass through, but neither is fresh air. The systems also begin to use more energy as they attempt to bypass the blockage and push airflow through. The resulting strain will eventually cause mechanical strain and an increase in energy billing that rises over time.

Your air filters need regular maintenance or there will be a gradual rise in costs over time as they become dirtier. We offer replacement 19.75x21.5x1 size air filters to help keep the airflow coming into your home fresh and clean. Filter King also provides a delivery service where new air filters are delivered, regularly if you choose to use our subscription option. The filters will come with a MERV (Minimum Efficiency Reporting Value) rating that showing their effectiveness at cleaning airflow. Filter King air filters have a MERV rating of eight, and block irritants including:

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

19.75x21.5x1 Air Filter Delivery

Filter King air filters are able to fit into accommodating furnace systems to filter out incoming heated airflow. The filters clean the airflow, but as they become dirtier cause more serious problems due to the temperatures involved. Blocked airflow for your furnace leads to costly repairs as temperatures begin to rise. The heated airflow is also unable to enter your home leading to fluctuations between rooms. New air filters will help air go through the system more smoothly, so order today and enjoy fresh airflow.