12 x 24 x 1 Air and Furnace Filters

You already probably know the importance of keeping your 12x24x1 filter clean and replacing it regularly. But how often do you really need to replace your air or furnace filter? There are some factors that determine how often you need to change the filter, including what kind of filter you use, how many pets you have, and whether anyone in your home has allergies. If you are using a fiberglass or other disposable filter, you should change them anywhere from once a month to every three months. If you are using a higher quality pleated filter, they can generally last from three months to a year. Exact specifications are included with the filter. Also note that you can experiment to find the best quality (and best priced) filter for you, as you can buy a filter from almost any source and use it, so long as it is the right size.

As an added bonus, order today and receive Free Shipping on all air filter orders!

NOTE: Several brand replacements may be listed below. All filters on this page are compatible with each other. Each brand replacement is listed separately to provide you with corresponding part/model numbers for that specific filter.

Click on the + under "Details" below to see complete details about the filter.

Click here to view the Filter Comparison Chart

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DetailsBrand / Actual SizeMERVPrice / Filter# FiltersPrice / CaseCases
SC80
11‑1/2" x 23‑1/2" x 3/4"MERV 13$14.503$43.50 
11‑1/2" x 23‑1/2" x 3/4"MERV 13$13.006$78.00 
DetailsBrand / Actual SizeMERVPrice / Filter# FiltersPrice / CaseCases
SC60
11‑1/2" x 23‑1/2" x 3/4"MERV 11$10.003$30.00 
11‑1/2" x 23‑1/2" x 3/4"MERV 11$8.506$51.00 
DetailsBrand / Actual SizeMERVPrice / Filter# FiltersPrice / CaseCases
SC40
11‑1/2" x 23‑1/2" x 3/4"MERV 8$7.493$22.47 
11‑1/2" x 23‑1/2" x 3/4"MERV 8$6.496$38.94 
11‑1/2" x 23‑1/2" x 3/4"MERV 8$5.9912$71.88 
DetailsBrand / Actual SizeMERVPrice / Filter# FiltersPrice / CaseCases
Baking Soda
11‑1/2" x 23‑1/2" x 3/4"MERV 8 - Baking Soda$8.493$25.47 
DetailsBrand / Actual SizeMERVPrice / Filter# FiltersPrice / CaseCases
Activated Carbon
11‑1/2" x 23‑1/2" x 3/4"MERV 8 - Carbon$10.006$60.00 
DetailsBrand / Actual SizeMERVPrice / Filter# FiltersPrice / CaseCases
Filtrete 1900 Ultimate Allergen
11.7 x 23.7 x .75MPR 1900$18.996$113.94 
DetailsBrand / Actual SizeMERVPrice / Filter# FiltersPrice / CaseCases
Filtrete 1500 Ultra/Advanced Allergen
11.6 x 24.6 x .75MPR 1250/1500$16.996$101.94 
DetailsBrand / Actual SizeMERVPrice / Filter# FiltersPrice / CaseCases
Filtrete 1000 Micro Allergen
11.6 x 23.6 x .875MPR 1000$12.996$77.94 
DetailsBrand / Actual SizeMERVPrice / Filter# FiltersPrice / CaseCases
Filtrete 600 Dust & Pollen
11.6 x 23.6 x .875MPR 600$8.996$53.96 
DetailsBrand / Actual SizeMERVPrice / Filter# FiltersPrice / CaseCases
Flanders Poly
11‑5/8 x 23‑5/8 x 3/4MERV 5$2.9912$35.88 
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