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

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: $139.00

Manufactured: Canada

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

24x24x4 MERV 13 - 6 Pack 24x24x4 MERV 13 - 6 Pack

Nominal Size: 24 x 24 x 4
Actual Size: 23-3/8 x 23-3/8 x 3-3/4
Part #: UF13-42424-6
MERV: 13
Case: 6
Price: $159.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$121.00
4" Furnace Filters

20x20x4 MERV 8 - 4 Pack 20x20x4 MERV 8 - 4 Pack

Nominal Size: 20 x 20 x 4
Actual Size: 19-1/2 x 19-1/2 x 3-3/4
Part #: UF8-42020-4
MERV: 8
Case: 4
Price: $74.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
$57.00
4" Furnace Filters

16x20x4 MERV 8 - 3 Pack Pleated Furnace Filter 16x20x4 MERV 8 - 3 Pack Pleated Furnace Filter

Nominal Size : 16x20x4
Actual Size : 15-1/2 x 19-1/2 x 3-3/4
Part #: UF8-41620-3
MERV Rating: 8
# Per Case: 3
Price per Case: $59.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$46.00
4" Furnace Filters

16x20x4 MERV 8 - 4 Pack Pleated Furnace Filter 16x20x4 MERV 8 - 4 Pack Pleated Furnace Filter

Nominal Size : 16x20x4
Actual Size : 15-1/2 x 19-1/2 x 3-3/4
Part #: UF8-41620-4
MERV Rating: 8
Case: 4
Price: $74.99
* Exact Replacement for 3M Filtrete.

 

$57.00
4" Furnace Filters

20x20x4 MERV 13 - 4 Pack 20x20x4 MERV 13 - 4 Pack

Nominal Size: 20 x 20 x 4
Actual Size: 19-1/2 x 19-1/2 x 3-3/4
Part #: UF13-42020-4
MERV: 13
Case: 4
Price: $109.99

 

*Effective for dust, pollen, pet dander, bacteria and mold.
$83.00
4" Furnace Filters

20x20x4 MERV 11 - 6 Pack Pleated Furnace Filter 20x20x4 MERV 11 - 6 Pack Pleated Furnace Filter

Nominal Size : 20x20x4
Actual Size : 19-1/2 x 19-1/2 x 3-3/4
Part #: UF11-42020-6
MERV Rating: 11
Case: 6
Price: $119.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$91.00
4" Furnace Filters

16x20x4 MERV 13 - 6 Pack Pleated Furnace Filter 16x20x4 MERV 13 - 6 Pack Pleated Furnace Filter

Nominal Size : 16x20x4
Actual Size : 15-1/2 x 19-1/2 x 3-3/4
Part #: UF13-41620-6
MERV: 13
Per Case: 6
Price: $139.99
                                            * Exact Replacement for 3M Filtrete.

 

$105.00
4" Furnace Filters

16x20x4 MERV 13 - 4 Pack Pleated Furnace Filter 16x20x4 MERV 13 - 4 Pack Pleated Furnace Filter

Nominal Size : 16x20x4
Actual Size : 15-1/2 x 19-1/2 x 3-3/4
Part #: UF13-41620-4
MERV: 13
Case: 4
Price: $104.99

 

                                                  *Exact Replacement for 3M Filtrete.

$80.00
4" Furnace Filters

20x25x4 MERV 13 - 4 Pack 20x25x4 MERV 13 - 4 Pack

Nominal Size: 20 x 25 x 4
Actual Size: 19-1/2 x 24-1/2 x 3-3/4
Part #: UF13-42025-4
MERV: 13
Case: 4
Price per Case: $109.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$83.00
4" Furnace Filters

16x20x4 MERV 11 - 4 Pack Pleated Furnace Filter 16x20x4 MERV 11 - 4 Pack Pleated Furnace Filter

Nominal Size : 16x20x4
Actual Size : 15-1/2 x 19-1/2 x 3-3/4
Part #: UF11-41620-4
MERV Rating: 11
Case: 4
Price: $79.99

 

$61.00
4" Furnace Filters

24x24x4 MERV 13 - 4 Pack 24x24x4 MERV 13 - 4 Pack

Nominal Size: 24 x 24 x 4
Actual Size: 23-3/8 x 23-3/8 x 3-3/4
Part #: UF13-42424-4
MERV: 13
Case: 4
Price: $129.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$99.00
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