4 Inch Furnace Filters

 

4-Inch Furnace Filters: The Perfect Fit for Cleaner Air

It is vital to replace your 4 inch furnace filters regularly to maintain the air quality inside your home. Thicker furnace filters are specifically designed for longer durability and superior filtration than thinner alternatives. Thinner furnace filters tend to clog more rapidly and must be replaced often. 

Our 4-inch furnace filters are more efficient and have longer lifespans, sparing you the hassle (and expense) of frequent replacements. At United Filter, we provide furnace air filter solutions for every HVAC system and at prices lower than Amazon. We also provide expert assistance to make sure you select the best filter for your needs.

 

4-Inch Furnace Filters: The Perfect Fit for Cleaner Air

It is vital to replace your 4 inch furnace filters regularly to maintain the air quality inside your home. Thicker furnace filters are specifically designed for longer durability and superior filtration than thinner alternatives. Thinner furnace filters tend to clog more rapidly and must be replaced often. 

Our 4-inch furnace filters are more efficient and have longer lifespans, sparing you the hassle (and expense) of frequent replacements. At United Filter, we provide furnace air filter solutions for every HVAC system and at prices lower than Amazon. We also provide expert assistance to make sure you select the best filter for your needs.

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16x25x4 MERV 11 - 6 Pack Pleated Furnace Filter 16x25x4 MERV 11 - 6 Pack Pleated Furnace Filter
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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.
$114.99
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20x25x4 MERV 11 - 6 Pack Pleated Furnace Filter
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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.
$124.99
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16x24x4 MERV 11 - 6 Pack Pleated Furnace Filter
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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.
$114.99
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16x24x4 MERV 11 Furnace Filter
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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.
$84.99
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18x24x4 MERV 11 Furnace Filter - 4 Pack
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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.
$84.99
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wishlistAdd to wishlist
18x24x4 MERV 11 - 6 Pack Pleated Furnace Filter
View Detail
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.
$104.99
Add to Cart
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20x24x4 MERV 11 - 6 Pack Pleated Furnace Filter
View Detail
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.
$139.99
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20x24x4 MERV 11 - 4 Pack Pleated Furnace Filter
View Detail
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.
$89.99
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12x24x4 MERV 11 - 6 Pack Pleated Furnace Filter
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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

 

$104.99
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24x24x4 MERV 8 - 4 Pack 24x24x4 MERV 8 - 4 Pack
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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.
$94.99
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20x25x4 MERV 11 - Pleated Furnace Filter - 3 Pack
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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.
$69.99
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16x25x4 MERV 13 - 6 Pack
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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.
$184.99
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