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).

 

Filter
Sort by:
Show:
4" Furnace Filters

24x24x4 MERV 11 - 4 Pack 24x24x4 MERV 11 - 4 Pack

Nominal Size: 24 x 24 x 4
Actual Size: 23-3/8 x 23-3/8 x 3-3/4
Part #: UF11-42424-4
MERV: 11
Case: 4
Price: $109.99
*Effective for dust, pollen, pet dander, bacteria and mould.
$83.00
4" Furnace Filters

16x25x4 MERV 11 - 6 Pack Pleated Furnace Filter 16x25x4 MERV 11 - 6 Pack Pleated Furnace Filter

Nominal Size : 16x25x4
Actual Size : 15-1/2 x 24-1/2 x 3-5/8
Part #: UF11-41625-6
MERV: 11
Case: 6
Price: $114.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
$87.00
4" Furnace Filters

20x25x4 MERV 11 - 6 Pack Pleated Furnace Filter 20x25x4 MERV 11 - 6 Pack Pleated Furnace Filter

Nominal Size : 20x25x4
Actual Size : 19-1/2 x 24-1/2 x 3-3/4
Part #: UF11-42025-6
MERV Rating: 11
Case: 6
Price: $124.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$95.00
4" Furnace Filters

16x24x4 MERV 11 - 6 Pack Pleated Furnace Filter 16x24x4 MERV 11 - 6 Pack Pleated Furnace Filter

Nominal Size : 16x24x4
Actual Size : 15-1/2 x 23-1/2 x 3-3/4
Part: UF11-41624-6
MERV: 11
Case: 6
Price: $114.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
$87.00
4" Furnace Filters

16x24x4 MERV 11 Furnace Filter 16x24x4 MERV 11 Furnace Filter

Nominal Size : 16x24x4
Actual Size : 15-1/2 x 23-1/2 x 3-3/4
Part: UF11-41624-4
MERV: 11
Case: 4
Price: $84.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
$65.00
4" Furnace Filters

18x24x4 MERV 11 Furnace Filter - 4 Pack 18x24x4 MERV 11 Furnace Filter - 4 Pack

Nominal Size : 18x24x4
Actual Size : 17-1/2 x 23-1/2 x 3-3/4
Part: UF11-41824-4
MERV: 11
Case: 4
Price: $84.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
$65.00
4" Furnace Filters

18x24x4 MERV 11 - 6 Pack Pleated Furnace Filter 18x24x4 MERV 11 - 6 Pack Pleated Furnace Filter

Nominal Size : 18x24x4
Actual Size : 17-1/2 x 23-1/2 x 3-3/4
Part: UF11-41824-6
MERV: 11
Case: 6
Price: $104.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
$80.00
4" Furnace Filters

20x24x4 MERV 11 - 6 Pack Pleated Furnace Filter 20x24x4 MERV 11 - 6 Pack Pleated Furnace Filter

Nominal Size: 20x24x4
Actual Size: 19-1/2 x 23-1/2 x 3-3/4
Part: UF11-42024-6
MERV: 11
Case: 6
Price: $139.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
$106.00
4" Furnace Filters

20x24x4 MERV 11 - 4 Pack Pleated Furnace Filter 20x24x4 MERV 11 - 4 Pack Pleated Furnace Filter

Nominal Size: 20x24x4
Actual Size: 19-1/2 x 23-1/2 x 3-3/4
Part: UF11-42024-4
MERV: 11
Case: 4
Price: $89.99

 

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

12x24x4 MERV 11 - 6 Pack Pleated Furnace Filter 12x24x4 MERV 11 - 6 Pack Pleated Furnace Filter

Nominal: 12x24x4
Actual: 11-3/8 x 23-3/8 x 3-5/8
Part #: UF11-41224-6
MERV: 11
Case: 6
Price: $104.99

 

$80.00
4" Furnace Filters

24x24x4 MERV 8 - 4 Pack 24x24x4 MERV 8 - 4 Pack

Nominal Size: 24 x 24 x 4
Actual Size: 23-3/8 x 23-3/8 x 3-3/4
Part #: UF8-42424-4
MERV: 8
Case: 4
Price: $89.99


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

20x25x4 MERV 11 - Pleated Furnace Filter - 3 Pack 20x25x4 MERV 11 - Pleated Furnace Filter - 3 Pack

Nominal Size : 20x25x4
Actual Size :  19-1/2 x 24-1/2 x 3-3/4
Part #: UF11-42025-3
MERV: 11
Case: 3
Price: $69.99
                                               FREE SHIPPING


Effective for dust, pollen, pet dander, bacteria and mould.
$53.00
Show: