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20x25x4 Furnace Filters

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  1. 20x25x4 MERV 8

    20x25x4 MERV 8

    Actual Size
    19-1/2 x 24-1/2 x 3-3/4
    Case of 6
    $79.99
    Part
    UF8-42025
  2. 20x25x4 MERV 11

    20x25x4 MERV 11

    Actual Size
    19-1/2 x 24-1/2 x 3-3/4
    Case of 6
    $109.99
    Part
    UF11-42025
  3. 20x25x4 MERV 13

    20x25x4 MERV 13

    Actual Size
    19-1/2 x 24-1/2 x 3-3/4
    Case of 6
    $139.99
    Part
    UF13-42025
  4. 20x25x4 MERV 11

    20x25x4 MERV 11

    Actual Size
    19-1/2 x 24-1/2 x 3-3/4
    Case of 4
    $99.99
    Part
    UF11-42025-4

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20x25x4 Pleated Air Filters, Furnace Filters Replacement 

Nominal size : 20" x 25" x 4"

Actual size :19 1/2" x 24 1/2" x 3 3/4"

This 4 inch filter is a high quality, economical aftermarket replacement.

Made of 100% synthetic media. It will not absorb water, preventing the growth of mould, fungi and bacteria. Made with fire retardant materials. A rigid constructed housing with efficiently spaced pleats, enabling excellent surface capacity for better air filtration of airborne particles.

Pleated Air Filters

Spacing of the pleats allows for air travel across the entire surface of the 4 inch filter and increased filtering capacity. Larger dust particles are captured at the top and bottom of the pleat. Smaller particles will be caught in the sides of the pleat surface.

The filter is constructed from a rigid, fire retardant material. It performs extremely well even in difficult operating conditions. The filtering media is glued to the frame itself, ensuring that the air will not be able to escape, or bypass the filter.

Maximize your Energy Efficiency

The most important thing to know is the correct length, width and thickness for your replacement air filter. Once you know that, you can decide what's most important to you.  Is it maximizing your energy efficiency?  Removing more particles from the air? Clean air in your home should never be compromised. That's why we carry a wide selection of residential and home air filters, pleated air filters, furnace filters and ac filters, to help you breathe easier in your home.

Controlling Indoor Home Air Pollution

If health is on your mind, you are certainly concerned about indoor home air pollution. The air inside your home is what you breathe everyday, and it can impact your susceptibility to asthma, allergies and other respiratory problems. For this reason, controlling the quality of air inside your home is always important.

One of the best ways to control indoor home air pollution and generally protect the quality of air inside your house is to change the  filter in your HVAC system regularly. These filters are usually disposable, and they should be changed at least once every three months.
Unitedfilter offers a huge selection of standard air filter sizes in 1", 2", 4" and 6" widths.  You can see the complete list here.  However, you may have a filter with dimensions that do not match any of the standard sizes. Don’t worry, we have the solution. We offer a custom air filter service to meet your needs. When placing your order, find your filter size” button.
 
You will be able to input any nonstandard filter dimensions you require. Please make sure the dimensions that you enter are correct. We cannot accept returns of custom filter sizes. Click here for information on Importance of changing (or cleaning) your furnace air filter. Learn more about replacing your air filters here.
 

Air Filter Quality Ratings Chart

Air Filter Quality Ratings Chart unitedfilter-airfilters-furnace-acfilters