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

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.
$66.00
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.
$85.00
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.
$96.00
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.
$54.00
4" Furnace Filters

Honeywell TrueClean 20x25x4 MERV 15 Honeywell TrueClean 20x25x4 MERV 15

Nominal Size: 20 x 25 x 4
Actual Size: 20-3/4 x 24-1/2 x 3-58 
Part: UFH-42025-1
MERV: 15

Price: $194.99

Fits: Honeywell FH8000F2025, FR8000F2025, GAPPBBCAR2025
$150.00