20x25x4 Standard Filters

NOTE: Please compare the actual size of your current filter with the actual sizes listed on our site. A nominal 20" x 25" x 4" filter can be different actual sizes depending on the brand of your air cleaner.
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What Our Customers Have to Say

Alex P. 1 day ago
5
Excellent product for the price - very reliable and customer oriented!! I have been ordering from them for years and receive my order in a very timely manner.
Willis C. 1 day ago
5
Filters perform well, and I'm glad to be able to buy the odd size filter I need at Discount Filter.
Benita L. 1 day ago
5
They always work good . I will continue to order them.
Regina D. 1 day ago
5
Appears to be well constructed. Arrived promptly. So far so good