4" 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).

 

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).

 

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4" Furnace Filters

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

Nominal Size : 16x20x4
Actual Size : 15-1/2 x 19-1/2 x 3-3/4
Part #: UF11-41620-3
MERV Rating: 11
Case: 3
Price: $69.99

 

$53.00
4" Furnace Filters

16x25x4 MERV 8 - 6 Pack 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: $104.99
$79.00
4" Furnace Filters

16x25x4 MERV 8 - 4 Pack Pleated Furnace Filter 16x25x4 MERV 8 - 4 Pack Pleated Furnace Filter

Nominal Size : 16x25x4
Actual Size : 15-1/2 x 24-1/2 x 3-3/4
Part #: UF8-41625-4
MERV : 8
Case: 4
Price: $92.99

 

*Effective for dust, pollen, pet dander, bacteria and mold.
$70.00
4" Furnace Filters

16x25x4 MERV 8 - 3 Pack Pleated Furnace Filter 16x25x4 MERV 8 - 3 Pack Pleated Furnace Filter

Nominal Size : 16x25x4
Actual Size : 15-1/2 x 24-1/2 x 3-3/4
Part #: UF8-41625-3
MERV Rating: 8
Case: 3
Price: $69.99

 

*Effective for dust, pollen, pet dander, bacteria and mold.
$53.00
4" Furnace Filters

16x25x4 MERV 11 - 4 Pack Pleated Furnace Filter 16x25x4 MERV 11 - 4 Pack Pleated Furnace Filter

Nominal Size : 16x25x4 
Actual Size : 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.

$57.00
4" Furnace Filters

16x25x4 MERV 11 - 3 Pack Pleated Furnace Filter 16x25x4 MERV 11 - 3 Pack Pleated Furnace Filter

Nominal Size : 16x25x4
Actual Size : 15-1/2 x 24-1/2 x 3-5/8
Part #: UF11-4162511-3
MERV Rating: 11
Case: 3
Price: $69.99

 

* Exact Replacement for 3M Filtrete.
$53.00
4" Furnace Filters

16x25x4 MERV 13 - 3 Pack Pleated Furnace Filter 16x25x4 MERV 13 - 3 Pack Pleated Furnace Filter

Nominal Size : 16 x 25 x 4
Actual Size : 15-1/2 x 24-1/2 x 3-5/8
Part #: UF13-41625-3
MERV: 13
Case: 3
Price: $94.99

 

*Effective for dust, pollen, pet dander, bacteria and mold.
$72.00
4" Furnace Filters

16x25x4 MERV 13 - 4 Pack Pleated Furnace Filter 16x25x4 MERV 13 - 4 Pack Pleated Furnace Filter

Nominal Size : 16x25x4
Actual Size : 15-1/2 x 24-1/2 x 3-5/8
Part: UF13-41625-4
MERV: 13
Case: 4
Price: $119.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
$90.00
4" Furnace Filters

20x20x4 MERV 11 - 4 Pack Pleated Furnace Filter 20x20x4 MERV 11 - 4 Pack Pleated Furnace Filter

Nominal Size : 20x20x4
Actual Size : 19-1/2 x 19-1/2 x 3-3/4
Part #: UF11-42020-4
MERV Rating: 11
Case: 4
Price: $89.99

 

FREE SHIPPING

Effective for dust, pollen, pet dander, bacteria and mould.
$68.00
4" Furnace Filters

20x20x4 MERV 13 - 6 Pack Pleated Furnace Filter 20x20x4 MERV 13 - 6 Pack Pleated Furnace Filter

Nominal Size : 20x20x4
Actual Size : 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.
$109.00
4" Furnace Filters

20x25x4 MERV 11 - 4 Pack Pleated Furnace Filter 20x25x4 MERV 11 - 4 Pack Pleated Furnace Filter

Nominal Size : 20x25x4
Actual Size : 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.
$64.00
4" Furnace Filters

24x24x4 MERV 11 - 6 Pack 24x24x4 MERV 11 - 6 Pack

Nominal Size: 24 x 24 x 4
Actual Size: 23-3/8 x 23-3/8 x 3-3/4
Part #: UF11-42424-6
MERV: 11
Case: 6
Price: $119.00

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$90.00
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