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

12.5x21x1 Air Filter Merv 8
12.5x21x1 AC Filter Merv 11
12.5x21x1 Furnace Filter Merv 13
12.5x21x1 Filter Merv 13 Titanium
12.5x21x1 Filter Merv 10 Carbon

12.5x21x1 Air Filter MERV 8

AC Furnace Air Filter 12.5x21x1 -Inches MERV 8

1. Select Filter Quality

Odor Eliminator

2. Select Quantity

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

Product Description

Item Model Number: FKFB12.5X21A
Brand: Filter King
Filter size: 12.5x21x1
Actual Size: 12.5 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

12.5x21x1a Air Filter Reviews

12.5x21x1 Air Filter

Filter King 12.5x21x1 size air filters are necessary components to any standard air system to keep the incoming airflow clean. There is a large range of irritants that are capable of entering your home via airflow. Your home may have any level of pollutants or allergens in the surrounding air able to quickly drop its indoor air quality. To avoid airborne issues for a home, it is best to install new air filter regularly to avoid any issues with the airflow in a home. Air filters are capable of cleaning the air, but they also become a problem themselves as they become dirtier.

The air filters in your home will eventually become dirty over time, and the resulting issues will only grow worse as they become dirtier. Your air filters consist of a tight mesh weaving designed to capture passing irritants while airflow is allowed to pass through. When the mesh is covered in captured particles then the airflow is unable to pass through and cycle within a home. Your home needs consistent airflow or the resulting problems lead to dry air, stagnation, increased billing and strain on your home’s air systems.

Our 12.5x21x1 size air filters are able to fit into any accompanying air systems and help provide your home with fresh airflow. The filters rate as an eight on the MERV (Minimum Efficiency Reporting Value) scale. With that rating, the filters are able to block out a range of irritants including:

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

12.5x21x1 Air Filter Delivery

Filter King offers replacement filters at affordable prices designed to fit easily into any accompanying air systems. The air filters you order are usable upon arrival, with bulk orders of two or more shipped for free. We offer a subscription service as well, where new filters are delivered regularly to your home. Stop worrying about clean airflow and order the filters that will help keep your home smelling fresh and clean.