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25x25x1 Air Filter Merv 8
25x25x1 AC Filter Merv 11
25x25x1 Furnace Filter Merv 13
25x25x1 Filter Merv 13 Titanium
25x25x1 Filter Merv 10 Carbon
25x25x1 Filter Merv 8 Carbon 25x25x1 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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25x25x1 Air Filter

AC Furnace Air Filter 25x25x1 -Inches

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Odor Eliminator

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Product Description

Item Model Number: FKFB25X25
Brand: Filter King
Filter size: 25x25x1
Actual Size: 24.5 x 24.5 x .75
1-Inch Filter
MERV 8 Filter Rating
Protection From: Pollen, Fine Dust, Mold Spores, Dust Mites, Bacteria, Pet Dander, Tobacco Smoke, Viruses
Residential / Commercial Use

Manufactured in the US

Why Buy Air Filters From Filter King?


In comparison to fiberglass filters, 25x25x1 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.

25x25x1 Air Filter Reviews

What MERV Rating should I choose?

How Often to Change Your 25x25x1 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.

25x25x1 Air Filter

Your household needs pleated air filters in the HVAC system to keep the incoming airflow smelling clean and remaining healthy. Filter King 25x25x1 size air filters fit into appropriately size systems and provide much needed protection against airborne irritants. The average home HVAC system will continue to pump in as much air as it can over its life cycle, which means there is no limit to the amount of irritants that could try and enter your home. Pleated air filters will help prevent irritants from entering your duct system and dirtying up your home. In the process, the pleated air filters in your systems will become dirty and require replacement to prevent a different set of problems from developing in your home.

Air Filter Use for Residential Homes

The average home goes through air filters at a regular rate with many air systems that need for protection from irritants. The airflow your systems pump inside are capable of carrying a wide range of pollutants or allergens from outside. The pleated air filters in your systems make sure that your ducts and home are protected from irritants but become dirty themselves in the process. 

Dirty air filters cause problems that will only grow over time, so new 25x25x1 air filters are needed in a system as soon as possible.

When the pleated air filters in your home are dirty, then the resulting blockage causes airflow to become hindered or stop entirely. When the airflow stops, then that causes the air already in your home to stay there until it begins to start causing problems. Old air tends to stagnate over time, it dries out as well, making it uncomfortable and unhealthy to breathe in. A new air filter will allow air to pass by without issue and keep your home’s indoor air quality from dipping.

Pleated Air Filter Use for Apartments

Your apartment has fewer options than other types of residences when it comes to ensuring that incoming airflow stays fresh and clean. Every breath counts, which makes air filters that much more important to keep clean. The airflow is not only cleaned coming into your home, it is also cleaned as it travels throughout. The air inside your home may contain any number of irritants due to its residents, making pleated air filters vital to keeping the air inside comfortable to breathe.

The air filters in your apartment allow airflow to pass and at the same time clean out any passing irritants. The air in a room may contain airborne microscopic particles like smoke or pet dander that tend to cling to whatever surfaces they are able to. The lingering small particles are usually able to cycle out of room on air flow and then become trapped or absorbed before they enter the ducts.

25x25x1 Furnace Filter

Your furnace system is going to need air filters as well to make sure the heated air coming through becomes cleaned. The temperature in your home depends on the heated airflow in order to match the number on your thermostat. The pleated air filter goes in between where the air becomes heated and blower fan that will distribute it throughout an air system. The furnace filters become dirty over time and need replacement or there could be serious consequences.

When heated airflow is unable to leave a furnace, then the resulting buildup in heat may be more than the system can handle. The spike in temperatures result in damage to a system which will eventually lead to some very costly repairs and possibly even a total system failure. Your home will show signs of a dirty furnace filter when temperatures fluctuate from room to room. 

New pleated air filters will help you avoid unnecessary costs, keep your furnace system safe, and help keep heated airflow going without issue.

Air Filter Changing Practices

The pleated air filters in your home need regular maintenance or the effects on the home will become more serious over time. Dirty air filters affect your home’s air quality and create a strain on its air systems which only grow worse over time. The blockage in the system also causes a rise in electrical usage as the airflow is pushed in an attempt to bypass the problem. The spike in electrical usage will cause your home billing to rise, costing you up to thousands a year.

Your pleated air filters need regular maintenance, the rate of which typically depends on their MERV rating (Minimum Efficiency Reporting Value) rating and your home environment. The MERV rating of your pleated air filters determines just how capable they are at capturing particles such as mold spores, household dust, in passing airflow. The amount of particles your filters will need to handle is often tied into the environment. 

Filter King 25x25x1 size filters rank as an eight on the MERV rating scale and are capable of protecting your home against irritants like:

  • Pollen
  • Household Dust
  • Fine Dust
  • Mold Spores
  • Dust Mites
  • Bacteria
  • Pet Dander
  • Smoke
  • Viruses

Replacing an Old Air Filter

The old air filter in your home need maintenance on a regular schedule, the process only takes a few steps and a little time. The pleated air filters are locatable using the air system owner’s manual to see where they are installed. Once you take out the old air filter, the size is found along the cardboard edge. You need to order a new air filter in a similar size to make sure that it will fit smoothly into the system.

Air Filter Delivery

Filter King 25x25x1 air filter is manufactured to match a high quality, premium standards. We sell our filters at affordable prices, which become even more affordable with bulk orders. Orders of more than two filters are shipped for free, and we even offer a subscription service that has new air filters delivered at often as monthly. Order your pleated air filters now and enjoy fresh, clean air in your home.