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).

 

24x24x4 MERV 11 - 6 Pack
$119.99

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.
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$119.99
24x24x4 MERV 13 - 6 Pack
$134.99

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: $134.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
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$134.99
24x24x4 MERV 13 - 4 Pack
$109.99

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: $109.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
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$109.99
24x24x4 MERV 11 - 4 Pack
$109.99

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.
View full details
$109.99
24x24x4 MERV 11 - 4 Pack Pleated Furnace Filter
$94.99

24x24x4 MERV 11 - 4 Pack Pleated Furnace Filter

Nominal Size: 24x24x4
Actual Size: 23-1/2 x 23-1/2 x 3-3/4
Part: UF11-42424-4
MERV: 11
Case: 4
Price: $94.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
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$94.99
24x24x4 MERV 11 - 6 Pack Pleated Furnace Filter
$114.99

24x24x4 MERV 11 - 6 Pack Pleated Furnace Filter

Nominal Size: 24x24x4
Actual Size: 23-1/2 x 23-1/2 x 3-3/4
Part: UF11-42424-6
MERV: 11
Case: 6
Price: $114.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
View full details
$114.99