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: $119.00

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$92.00
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.
$123.00
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.
$100.00
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.
$85.00
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.
$69.00