4 Inch Furnace Filters

Improve the air quality in your home with a 4 inch furnace filter.

At United Filter, we know that you want only the best for your family, and that's why we offer 4 inch furnace filters to our Canadian and American customers. We have multiple size options to fit your needs, so you can be sure they'll fit seamlessly into your home's HVAC system and provide extended life, reduced energy consumption, and enhanced allergen control.

Our 4 inch furnace filters are designed with a dual-layer design that improves filtration efficiency while extending replacement intervals. We also have customisation options available so you can ensure that these filters fit seamlessly into your current HVAC system without disrupting operation or performance of any kind.

Stop wasting money on frequent maintenance! Get a 4 inch furnace filter today!

Improve the air quality in your home with a 4 inch furnace filter.

At United Filter, we know that you want only the best for your family, and that's why we offer 4 inch furnace filters to our Canadian and American customers. We have multiple size options to fit your needs, so you can be sure they'll fit seamlessly into your home's HVAC system and provide extended life, reduced energy consumption, and enhanced allergen control.

Our 4 inch furnace filters are designed with a dual-layer design that improves filtration efficiency while extending replacement intervals. We also have customisation options available so you can ensure that these filters fit seamlessly into your current HVAC system without disrupting operation or performance of any kind.

Stop wasting money on frequent maintenance! Get a 4 inch furnace filter today!

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4 Inch 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.
$86.00
4 Inch 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.
$94.00
4 Inch 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.
$86.00
4 Inch 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.
$64.00
4 Inch 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.
$64.00
4 Inch 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.
$79.00
4 Inch 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.
$105.00
4 Inch 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 Inch 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

 

$79.00
4 Inch 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: $94.99


*Effective for dust, pollen, pet dander, bacteria and mould.
$71.00
4 Inch 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
4 Inch Furnace Filters

16x25x4 MERV 13 - 6 Pack 16x25x4 MERV 13 - 6 Pack

Nominal Size : 16x25x4
Actual Size : 15-1/2 x 24-1/2 x 3-5/8
Part: UF13-41625-6
MERV: 13
Case: 4
Price: $184.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
$139.00
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