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AIR FILTER - 4 INCH, MERV 11

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These are four inch deep, MERV 11 air filters. We also offer these air filters in 1" - 2" and 6" sizes, and in MERV 8 and MERV 13. To understand the meaning of MERV, go to Additional Air Filter Info at bottom of page.

To find your size quickly, enter the size in the search box on the left.  Enter it like this: 
Example - 8x14x2  or  9.75x23.75x2....No spaces between the letters or digits.

We have a lot of "Standard Size air filters, but if you can't find your size on our website we can custom-make a filter in any size. Find out how to Order it.


Caution:
  One can easily be mislead by the size written on the filter frame, and order the wrong filter.  To avoid this, go to Additional Air Filter Info at bottom of page for an explanation.

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19.75 x 24.75 x 4 Custom-Made MERV 11 Filter 19.75 x 24.75 x 4 Custom-Made MERV 11 Filter
ONLY: $22.48 each - FREE SHIPPING + SAVE When You Order More
11.75 x 12.5 x 2 Custom-Made MERV 11 Filter 11.75 x 12.5 x 2 Custom-Made MERV 11 Filter
ONLY: $13.45 each - FREE SHIPPING + SAVE When You Order More
7.75 x 15.75 Custom-Made MERV 11 Filter 7.75 x 15.75 Custom-Made MERV 11 Filter
ONLY: $14.50 each - FREE SHIPPING + SAVE When You Order More
17.625 x 35.625 x 1 Custom-Made MERV 11 Filter 17.625 x 35.625 x 1 Custom-Made MERV 11 Filter
ONLY: $19.95 each - FREE SHIPPING + SAVE When You Order More
29 x 35.5 x 2 Custom-Made MERV 11 Filter 29 x 35.5 x 2 Custom-Made MERV 11 Filter
ONLY: $33.97 each - FREE SHIPPING + SAVE When You Order More
11 x 25 x 1 Custom-Made MERV 8 Filter (Please see note below) 11 x 25 x 1 Custom-Made MERV 8 Filter (Please see note below)
ONLY: $11.95 each - FREE SHIPPING + SAVE When You Order More
16 x 25 x 2 Custom-Made MERV 8 Filter (Please see note below) 16 x 25 x 2 Custom-Made MERV 8 Filter (Please see note below)
ONLY: $13.95 each - FREE SHIPPING + SAVE When You Order More
16 x 20 x 1 Custom-Made MERV 8 Filter (Please see note below) 16 x 20 x 1 Custom-Made MERV 8 Filter (Please see note below)
ONLY: $12.95 each - FREE SHIPPING + SAVE When You Order More
7 x 21.5 x 1 Custom-Made MERV 8 Filter (Please see note below) 7 x 21.5 x 1 Custom-Made MERV 8 Filter (Please see note below)
ONLY: $11.95 each - FREE SHIPPING + SAVE When You Order More
19" x 20-3/4" x 1/2" Custom-Made MERV 11 Filter 19" x 20-3/4" x 1/2" Custom-Made MERV 11 Filter
ONLY: $17.23 each - FREE SHIPPING + SAVE When You Order More
12" x 20-3/4" x 1/2" Custom-Made MERV 11 Filter 12" x 20-3/4" x 1/2" Custom-Made MERV 11 Filter
ONLY: $17.23 each - FREE SHIPPING + SAVE When You Order More
16 x 25 x 1 Custom-Made MERV 11 Filter 16 x 25 x 1 Custom-Made MERV 11 Filter
ONLY: $16.95 each - FREE SHIPPING + SAVE When You Order More
11.25 x 23.25 x .05 Custom-Made MERV 8 Filter (Please see note below) 11.25 x 23.25 x .05 Custom-Made MERV 8 Filter (Please see note below)
ONLY: $9.46 each - FREE SHIPPING + SAVE When You Order More
9 1/2 x 19 1/2 x 6 Custom-Made MERV 8 Filter (Please see note below) 9 1/2 x 19 1/2 x 6 Custom-Made MERV 8 Filter (Please see note below)
ONLY: $18.49 each - FREE SHIPPING + SAVE When You Order More
7" x 29 3/4" x 1" Custom-Made MERV 8 Filter (Please see note below) 7" x 29 3/4" x 1" Custom-Made MERV 8 Filter (Please see note below)
ONLY: $13.86 each - FREE SHIPPING + SAVE When You Order More
custom filter MERV-11 Custom Filter 23-1/8x30-5/8x4
ONLY: $42.79 each - FREE SHIPPING + SAVE When You Order More
custom filter MERV-11 Custom Grill Filter 20x30x4 (19 5/8" X 29 5/8")
ONLY: $39.85 each - FREE SHIPPING + SAVE When You Order More
   
 


MERV: If you don't already know the meaning of MERV, here is a definition: Simply stated, the higher the MERV number, the more efficient the air filter will be in removing contaminants and pollutants from the airflow in your home or office. A MERV 13 air filter is more than twice as efficient as a MERV 8 in removing contaminants 1 micron in size. To understand how small 1 micron is, a human hair measures 100 microns. Finally, keep in mind that the MERV rating has nothing to do with size. MERV 8 and MERV 11 and MERV 13 are all the same size air filters for any given model number.

Caution, Ordering The Right Size:  Measure your existing filter because the size written on the frame may, or may not be the true size. Depending on the manufacturer, the size on your filter frame could be "Nominal" (by name only) or "Actual" (true size). For example, a 20x24 "Nominal" filter will measure 19 1/2 x 23 1/2. On the other hand, a 20 x 24 "Actual" filter will truly measure 20 x 24.  If you need a "Nominal Size", but order an "Actual Size", the filter you get will not fit

Custom-made Filters:  If you do not see your size in the table above or find it in our search engine, we can make a special custom-made air filter for you.  Just email us the exact size, and we will get back to you with the price.....Custom-made filters cannot be re-stocked, so for that reason they cannot be returned if you order the wrong size,  So, please make sure that you order the right size. .