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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20x25x4 MERV 11 - 4 Pack Pleated Furnace Filter

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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.

$84.99

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20x25x4 MERV 11 - 6 Pack Pleated Furnace Filter

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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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20x25x4 MERV 11 - Pleated Furnace Filter - 3 Pack

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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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Honeywell TrueClean 20x25x4 MERV 15

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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: UFT-42025-1

MERV: 15

Price: $214.99

Fits: Honeywell FH8000F2025, FR8000F2025, GAPPBBCAR2025

$214.99

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