4 Inch Furnace Filters

4" replacement furnace filters are available in many standard and non-standard sizes. Simply select your size from the drop down box below to choose your filter size. Keep in mind that length and width are reversible (i.e. a 15x20x4 is the same as a 20x15x4).

 

16x20x4 MERV 11 - 3 Pack Pleated Furnace Filter
$54.99

16x20x4 MERV 11 - 3 Pack Pleated Furnace Filter

Nominal Size of Furnace Filter: 16x20x4
Actual Size  of Furnace Filter: 15-1/2 x 19-1/2 x 3-3/4
Part #: UF11-41620-3
MERV Rating: 11
Case: 3
Price: $54.99

 

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$54.99
16x25x4 MERV 8 - 6 Pack
$84.99

16x25x4 MERV 8 - 6 Pack

Nominal Size: 16 x 25 x 4
Actual Size: 15-1/2 x 24-1/2 x 3-3/4
Part #: UF8-41625-6
MERV: 8
Case: 6
Price: $84.99
$84.99
16x25x4 Air Filter MERV 11 - 16x25x4 Furnace Filter
$74.99

16x25x4 MERV 11 - 4 Pack Pleated Furnace Filter

Nominal Size of Furnace Filter: 16x25x4 
Actual Size of Furnace Filter: 15-1/2 x 24-1/2 x 3-5/8
Part #: UF11-41625-4
MERV Rating: 11
Case: 4
Price: $74.99

 

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Effective for dust, pollen, pet dander, bacteria and mould.

Exact Replacement for 3M Filtrete Furnace Filter.

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$74.99
16x25x4 MERV 11 - 3 Pack Pleated Furnace Filter
$59.99

16x25x4 MERV 11 - 3 Pack Pleated Furnace Filter

Nominal Size of Furnace Filter: 16x25x4
Actual Size of Furnace Filter: 15-1/2 x 24-1/2 x 3-5/8
Part #: UF11-4162511-3
MERV Rating: 11
Case: 3
Price: $59.99

 

* Exact Replacement for 3M Filtrete.
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$59.99
16x25x4 MERV 13 - 4 Pack Pleated Furnace Filter
$109.95

16x25x4 MERV 13 - 4 Pack Pleated Furnace Filter

Nominal Size of Furnace Filter: 16x25x4
Actual Size of Furnace Filter: 15-1/2 x 24-1/2 x 3-5/8
Part: UF13-41625-4
MERV: 13
Case: 4
Price: $109.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
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$109.95
20x20x4 MERV 11 - 4 Pack Pleated Furnace Filter
$69.99

20x20x4 MERV 11 - 4 Pack Pleated Furnace Filter

Nominal Size of Furnace Filter: 20x20x4
Actual Size of Furnace Filter: 19-1/2 x 19-1/2 x 3-3/4
Part #: UF11-42020-4
MERV Rating: 11
Case: 4
Price: $69.99

 

FREE SHIPPING

Effective for dust, pollen, pet dander, bacteria and mould.
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$69.99
20x20x4 MERV 13 - 6 Pack Pleated Furnace Filter
$144.99

20x20x4 MERV 13 - 6 Pack Pleated Furnace Filter

Nominal Size of Furnace Filter: 20x20x4
Actual Size  of Furnace Filter: 19-1/2 x 19-1/2 x 3-3/4
Part #: UF13-42020-6
MERV: 13
Case: 6

Price: $144.99 

*Effective for dust, pollen, pet dander, bacteria and mould.
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$144.99
20x25x4 MERV 11 - 4 Pack Pleated Furnace Filter
$84.99

20x25x4 MERV 11 - 4 Pack Pleated Furnace Filter

Nominal Size of Furnace Filter: 20x25x4
Actual Size of Furnace Filter:  19-1/2 x 24-1/2 x 3-3/4
Part #: UF11-42025-4
MERV Rating: 11
Case: 4
Price: $84.99
                                               FREE SHIPPING


Effective for dust, pollen, pet dander, bacteria and mould.
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$84.99