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18x25x1 Air Filter Merv 8
18x25x1 AC Filter Merv 11
18x25x1 Furnace Filter Merv 13
18x25x1 Filter Merv 13 Titanium
18x25x1 Filter Merv 10 Carbon
18x25x1 Filter Merv 8 Carbon 18x25x1 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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18x25x1 Air Filter

AC Furnace Air Filter 18x25x1 -Inches

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Odor Eliminator

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Product Description

Item Model Number: FKFB18X25
Brand: Filter King
Filter size: 18x25x1
Actual Size: 17.5 x 24.5 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, 18x25x1 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.

18x25x1 Air Filter Reviews

What MERV Rating should I choose?

How Often to Change Your 18x25x1 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.

18x25x1 Air Filter

Filter King 18x25x1 size air filters are vital parts of your air systems, used to keep incoming airflow free of harmful particles. Air filtration is an important process that prevents outside irritants from polluting your home. Your home’s indoor air quality benefits from cleaner airflow, making it safer and more comfortable over time. You will need fresh new air filters to help ensure that the airflow coming into your home continues to become clean over time.

The air quality is dependent on your air filters, mainly their ability to clean incoming airflow as well as allowing it to pass. Over time, the incoming airflow will begin to cover your filters in a layer of captured allergens and pollutants. The dirty air filters are unable to properly process incoming airflow, which is a problem for their systems and your home as a whole. Air systems with a blockage have difficulties that end up costing a home with expensive repairs and increased billing.

The air filters in your home require consistent maintenance in order to maintain functionality and effectiveness. Filter King offers new 18x25x1 size air filters to help keep air coming in at a consistent rate. We offer the filters you need, along with the delivery services needed to have them arrive at your home. Our air filters have a MERV (Minimum Efficiency Reporting Value) rating of eight, and block out irritants like:

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

18x25x1 Air Filter Delivery

The furnace filters in your home keep airflow coming through the system clean, but require consistent maintenance. Your furnace filters go in between where incoming airflow becomes heated and the blower fan that distributes it throughout your home. Dirty air filters stop this airflow from traveling, which leads to large temperature problems in the system and throughout your home. Order new air filters today, and avoid some of the most costly issues that follow having dirty air filters in your home.