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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18x24x4 MERV 11 Furnace Filter - 4 Pack

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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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18x24x4 MERV 11 - 6 Pack Pleated Furnace Filter

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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

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