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!

Filter
Sort by:
Show:
4 Inch Furnace Filters

24x24x4 MERV 11 - 6 Pack 24x24x4 MERV 11 - 6 Pack

Nominal Size: 24 x 24 x 4
Actual Size: 23-3/8 x 23-3/8 x 3-3/4
Part #: UF11-42424-6
MERV: 11
Case: 6
Price: $169.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$118.00
4 Inch Furnace Filters

24x24x4 MERV 13 - 6 Pack 24x24x4 MERV 13 - 6 Pack

Nominal Size: 24 x 24 x 4
Actual Size: 23-3/8 x 23-3/8 x 3-3/4
Part #: UF13-42424-6
MERV: 13
Case: 6
Price: $214.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$160.00
4 Inch Furnace Filters

20x20x4 MERV 8 - 4 Pack 20x20x4 MERV 8 - 4 Pack

Nominal Size: 20 x 20 x 4
Actual Size: 19-1/2 x 19-1/2 x 3-3/4
Part #: UF8-42020-4
MERV: 8
Case: 4
Price: $74.99

 

*Effective for dust, pollen, pet dander, bacteria and mould.
$56.00
4 Inch Furnace Filters

16x20x4 MERV 8 - 3 Pack Pleated Furnace Filter 16x20x4 MERV 8 - 3 Pack Pleated Furnace Filter

Nominal Size : 16x20x4
Actual Size : 15-1/2 x 19-1/2 x 3-3/4
Part #: UF8-41620-3
MERV Rating: 8
# Per Case: 3
Price per Case: $59.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$45.00
4 Inch Furnace Filters

16x20x4 MERV 8 - 4 Pack Pleated Furnace Filter 16x20x4 MERV 8 - 4 Pack Pleated Furnace Filter

Nominal Size : 16x20x4
Actual Size : 15-1/2 x 19-1/2 x 3-3/4
Part #: UF8-41620-4
MERV Rating: 8
Case: 4
Price: $74.99
* Exact Replacement for 3M Filtrete.

 

$56.00
4 Inch Furnace Filters

20x20x4 MERV 13 - 4 Pack 20x20x4 MERV 13 - 4 Pack

Nominal Size: 20 x 20 x 4
Actual Size: 19-1/2 x 19-1/2 x 3-3/4
Part #: UF13-42020-4
MERV: 13
Case: 4
Price: $114.99

 

*Effective for dust, pollen, pet dander, bacteria and mold.
$86.00
4 Inch Furnace Filters

20x20x4 MERV 11 - 6 Pack Pleated Furnace Filter 20x20x4 MERV 11 - 6 Pack Pleated Furnace Filter

Nominal Size : 20x20x4
Actual Size : 19-1/2 x 19-1/2 x 3-3/4
Part #: UF11-42020-6
MERV Rating: 11
Case: 6
Price: $119.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$90.00
4 Inch Furnace Filters

16x20x4 MERV 13 - 6 Pack Pleated Furnace Filter 16x20x4 MERV 13 - 6 Pack Pleated Furnace Filter

Nominal Size : 16x20x4
Actual Size : 15-1/2 x 19-1/2 x 3-3/4
Part #: UF13-41620-6
MERV: 13
Per Case: 6
Price: $139.99
                                            * Exact Replacement for 3M Filtrete.

 

$103.00
4 Inch Furnace Filters

16x20x4 MERV 13 - 4 Pack Pleated Furnace Filter 16x20x4 MERV 13 - 4 Pack Pleated Furnace Filter

Nominal Size : 16x20x4
Actual Size : 15-1/2 x 19-1/2 x 3-3/4
Part #: UF13-41620-4
MERV: 13
Case: 4
Price: $104.99

 

                                                  *Exact Replacement for 3M Filtrete.

$79.00
4 Inch Furnace Filters

16x20x4 MERV 11 - 4 Pack Pleated Furnace Filter 16x20x4 MERV 11 - 4 Pack Pleated Furnace Filter

Nominal Size : 16x20x4
Actual Size : 15-1/2 x 19-1/2 x 3-3/4
Part #: UF11-41620-4
MERV Rating: 11
Case: 4
Price: $79.99


United Filter 16x20x4 MERV 11 Pleated Furnace Filter - 4 Pack, your solution for maintaining cleaner and healthier indoor air quality. Designed to fit seamlessly into your HVAC system, these high-quality filters offer exceptional performance and filtration efficiency.

Key Features:

  1. Optimal Filtration: Our MERV 11 rating ensures that these pleated furnace filters effectively capture a wide range of airborne particles, including dust, pollen, pet dander, mold spores, and even some smaller particles, helping to improve indoor air quality for you and your family.

  2. Enhanced Efficiency: With a 16x20x4 size, these filters provide a larger surface area for air to pass through, allowing for better airflow without compromising on filtration quality. This results in improved HVAC system performance and reduced energy consumption.

  3. Longevity: Each filter is built to last, with a durable construction that maintains its integrity throughout its lifespan. The pleated design not only boosts filtration but also extends the filter's usage time, ensuring you get the most out of each filter change.

  4. Easy Installation: Replacing your furnace filter has never been easier. These filters are designed to fit perfectly into standard 16x20x4 filter slots, making installation a hassle-free process. Just remove the old filter and slide in the new one – no tools required.

  5. Pack of Four: This package includes four MERV 11 pleated furnace filters, providing you with an ample supply to last several months. Regular filter changes are recommended to ensure peak performance and maintain healthy indoor air quality.

  6. Health and Comfort: By reducing the presence of airborne allergens and pollutants, these filters contribute to a healthier and more comfortable living environment. Breathe easier knowing that you're taking proactive steps to protect your respiratory health.

Invest in the quality of the air you breathe with our 16x20x4 MERV 11 Pleated Furnace Filter 4-Pack. Designed to provide effective filtration, easy installation, and extended usage, these filters are an essential addition to any HVAC system. Enjoy cleaner air and a more pleasant living space with every breath.


 

$60.00
4 Inch Furnace Filters

24x24x4 MERV 13 - 4 Pack 24x24x4 MERV 13 - 4 Pack

Nominal Size: 24 x 24 x 4
Actual Size: 23-3/8 x 23-3/8 x 3-3/4
Part #: UF13-42424-4
MERV: 13
Case: 4
Price: $154.99

Manufactured: Canada

*Effective for dust, pollen, pet dander, bacteria and mould.
$116.00
4 Inch Furnace Filters

24x24x4 MERV 11 - 4 Pack 24x24x4 MERV 11 - 4 Pack

Nominal Size: 24 x 24 x 4
Actual Size: 23-3/8 x 23-3/8 x 3-3/4
Part #: UF11-42424-4
MERV: 11
Case: 4
Price: $109.99
*Effective for dust, pollen, pet dander, bacteria and mould.
$82.00
Show: