Best Foam Furnace Filters of 2026

Howard Chester Avatar
Howard Chester
Last Updated: Jan 20, 2026

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Foam furnace filters are a popular choice for homeowners looking to improve the indoor air quality of their homes. These filters are made of a durable foam material that captures a wide range of airborne particles, including dust, pollen, and pet dander. Unlike traditional filters made of paper or fiberglass, foam filters can be easily cleaned and reused, making them a more cost-effective option in the long run. They are also more environmentally friendly, as they do not need to be disposed of as frequently as other filters. Overall, foam furnace filters are a reliable and practical solution for those seeking to maintain a cleaner and healthier home environment.

At a Glance: Our Top Picks

AllergyZone FilterLock Furnace Filter Slot Seal Cover #TOP 1
AllergyZone FilterLock Furnace Filter Slot Seal
ftb score rating icon 9.8
CoreCarbon Natural Fiber Hog Hair Furnace Door Filter Cover #TOP 2
CoreCarbon Natural Fiber Hog Hair Furnace Door Filter
ftb score rating icon 9.7
CoreCarbon 20x30x1 Filter Media Cover #TOP 3
CoreCarbon 20x30x1 Filter Media
ftb score rating icon 9.5

Top 10 Foam Furnace Filters

#TOP 1

AllergyZone FilterLock Furnace Filter Slot Seal

AllergyZone
AZFL-100
2 Count (Pack of 1)
AllergyZone FilterLock Furnace Filter Slot Seal Cover
AllergyZone FilterLock Furnace Filter Slot Seal – Magnetic Seal Cover for Any 1” Furnace Filter, Up To 25” Long, Reduce HVAC Air Leaks, Green

Features
IMPROVE AIR QUALITY: Prevent Harmful Airborne Contaminants Such As Allergens, Dust, And Gases Like Carbon Monoxide From Entering Your HVAC System. Properly Sealing The Filter Slot/door Ensures That Pollutants Don't Bypass The Air Filter.
PROTECT YOUR HVAC SYSTEM: FilterLock Is A Patented Two-Piece Magnetic Seal System Designed For Furnace Systems With 1” Air Filters, Eliminating Air Leakage At The Filter Slot/door To Enhance Indoor Air Quality And Reduce Energy Consumption.
ENERGY EFFICIENT: Reduce Utility Bills And Save Energy By Effectively Stopping Air Leaks In Your HVAC System. This Not Only Enhances Overall Indoor Air Quality But Also Addresses One Of The Four Major Ductwork Issues Identified By Energy Star—air Leakage At The Filter Slot.
EASY TO INSTALL: Enjoy Hassle-Free Installation With FilterLock's Universal, One-Size-Fits-All Seal That Magnetically Attaches To Ductwork To Cover The Furnace Filter Slot Door. This Convenient Two-Piece Design Is Compatible With Any 1” Furnace Filter Up To 25” Long.
ADDITIONAL FEATURES: Benefit From A Reusable, Easy On/easy Off Magnetic Design That Ensures Long-Term Use. Once Both Pieces Are Installed, The Seal Measures Approximately 25 X 4.8 X 0.1 Inches, Providing A Perfect Fit For Your Needs.
#TOP 2

CoreCarbon Natural Fiber Hog Hair Furnace Door Filter

HHRF
Blue
19.5" x 28" x 1"
CoreCarbon Natural Fiber Hog Hair Furnace Door Filter Cover
CoreCarbon Natural Fiber Hog Hair Furnace Door Filter for Mobile, Manufactured and Modular Homes (19-1/2 x 28)

The CoreCarbon Natural Fiber Hog Hair Furnace Door Filter is a replacement filter made from high-grade natural fibers, designed to fit most brand name furnaces for mobile, manufactured, and modular homes. The filter comes pre-cut in various sizes, so there is no need for scissors to fit it into your furnace. Unlike synthetic material alternatives, this UL 900 classified filter provides the perfect balance of air flow and performance, allowing you to maintain and improve indoor air quality. Additionally, fast and free shipping is provided.

What We Like
Pre-cut for exact fitment
Original natural fiber hog hair replacement filter
Designed to fit many brand name furnaces
Provides proper balance of air flow and performance
Fast and free shipping

CoreCarbon 20x30x1 Filter Media

TX2030CTF-FBA
30" x 20" x 1"
CoreCarbon 20x30x1 Filter Media Cover
CoreCarbon 20x30x1 Cut To Fit Furnace & Air Conditioner Washable Reusable High Air Flow Polyester Fiber Filter Media, Made in USA (20" x 30" x .75" actual)

The CoreCarbon 20x30x1 Cut To Fit Furnace & Air Conditioner Washable Polyester Fiber Filter Media, also known as the CoreCarbon Filter Media, is a versatile and convenient solution for your furnaces and air conditioners. With its cut-to-fit design, you can easily customize the filter to any size needed, making installation a breeze. The washable feature allows you to rinse the filter with low-pressure water, ensuring it stays clean and efficient. As it is made in the USA with high-quality polyester fiber, you can trust its durability and performance. Designed to fit many brand name furnaces and air conditioners, this filter media ensures a proper balance of air flow and performance, providing you with cleaner and healthier indoor air. Upgrade your filtration system with the CoreCarbon Filter Media today!

What We Like
Easy to cut and fit
Washable and reusable
Sturdy construction
Improves air quality
Cost-effective solution
#TOP 4

UBeesize Air Vent Filters Kit

20 x 120 inches
20" x 120" x 0.5"
UBeesize Air Vent Filters Kit Cover
UBeesize Air Vent Filters, 20" x 120" Cut to Size Air Filter Material (80+ Filters), MERV 8 Triple Vent Filter Kit for Home Floor, Grilles, Ceiling, HVAC Furnace Vents, With 48PCs Adhesive Hook Tape

The UBeesize Air Filters are designed to enhance your home's air quality. Made from non-woven polyester, these filters capture dust, pollen, and pet dander effectively. With a MERV 8 rating, they provide excellent filtration without hindering airflow, ensuring a healthier indoor environment. The DIY-friendly design allows you to cut the 120 x 20-inch material into various sizes, making it easy to fit your specific vents. Additionally, using these filters helps reduce dust accumulation in your home, minimizing cleaning time and extending the lifespan of your HVAC system.

What We Like
Improved air quality
Easy DIY installation
Customizable filter sizes
Less frequent maintenance
#TOP 5

Filterbuy 20x25x5 Air Filter MERV 11 Allergen Defense (4-Pack)

HRF20x25x5M11=CARpk4
Gold
Filterbuy 20x25x5 Air Filter MERV 11 Allergen Defense (4-Pack) Cover
Filterbuy 20x25x5 Air Filter MERV 11 Superior Pet & Allergy Defense (4-Pack), Pleated HVAC AC Furnace Filters for Honeywell FC100A1037, Lennox X6673, and More (Actual Size: 19.88 x 24.75 x 4.38)

Filterbuy 20x25x5 Air Filter is a replacement for your furnace, air conditioner, heat pump, or HVAC system. The filter is compatible with various models and is made of synthetic media that traps 95% of airborne particles without compromising air flow. The filter is pleated and electrostatically charged, which makes it last 3x longer than fiberglass models. It comes in a pack of 4 and has an industrial-grade beverage board frame that outperforms standard cardboard designs.

What We Like
Compatible with various models
Synthetic media traps 95% of airborne particles without compromising air flow
Pleated and electrostatically charged, lasts 3x longer than fiberglass models

Trion Air Bear 255649-105 Air Filter

AIR-BEAR-255649-105
Grey
16" x 25" x 5"
Trion Air Bear 255649-105 Air Filter Cover
Trion 255649-105 Air Bear MERV 8 High-Performance Pleated Air Purifier Furnace Filter, Cleaner Purification Systems, 16 by 25 by 5 Inches (3 Pack)

This is a set of 3 pleated air filters designed to replace the filter media in Trion Air Bear air cleaners. The MERV 8 rated filters are 5 inches thick with non-woven pleated filter media that captures dust, pollen, pet dander, and other airborne particles as small as 1 micron. The moisture-resistant frame retains strength and shape even in high humidity. The filters have factory-installed double gasket that eliminates the need for filter bypass. The nominal size is 16 x 25 x 5 inches (without the 0.25-inch gasket), so be sure to confirm the measurements before ordering.

What We Like
Set of 3 filters
Efficient MERV 8 rated filter media
Pleated filter media captures particles as small as 1 micron
#TOP 7

Trion 3 Pack Pleated Air Filter

259112-102
Grey
3 Count (Pack of 1)
Trion 3 Pack Pleated Air Filter Cover
Trion 3 Pack Pleated Air Filter, Air Bear MERV 11 for HVAC/Furnace, 20x25x5 in.

Features
Comes With A Factory-Installed Double Gasket, This Equipment Ensures Seamless Filtration, Eliminating Any Requirement For Filter Bypass Mechanisms And Providing Peace Of Mind For Your Filtration Needs
Set Of 3 Replacement Air Filters Designed For Your Trion Air Bear Air Cleaners To Provide Superior Filtration; Recommended Replacement For Your Filter Is Every 6 Months For Best Performance
Non-Woven, 5-Inch Thick, Pleated Filter Retains Its Shape Even When Dirty Or When Air Pressure Drops, Guaranteeing That The Filter Captures As Much Dirt And Dust As Possible
Frame That Resists Moisture Maintains Strength Even In High Humidity While The Galvanized, Rust-Resistant Wire Mesh, Integral Width Filter Supports Media And Retains Pleat Shape Even When Dirty
Air Filtration System Is Designed To Provide Exceptional Performance With Its MERV 11 Rating And An Advanced Filter Composed Of Electrostatically Charged Synthetic Filter Material
#TOP 8

Trion Air Bear 255649-102 Replacement Filter

B003ZVK1EG
White
Trion Air Bear 255649-102 Replacement Filter Cover
Trion Air Bear 255649-102 Replacement Filter - 20x25x5, Three Per Box

Features
Dimensions: 19.75 X 24.25 X 4.94-Inches
Efficiency Rating Of MERV 8, Rated Air Flow Up To 2000 Cfm
Made In The USA
Electrostatical, Charged Synthetic Material, Features Extended Surface Pleats That Have A Higher Dirt-Holding Capacity Than Competitive Filters.
Air Bear Filters Capture And Hold Pollutants Inside The Filter, Allowing Air To Flow Freely Through The System
#TOP 9

Trion Air Bear 255649-102 - 20" x 25" x 5" Pleated Air Filter

255649-102
20" x 25" x 5"
Trion Air Bear 255649-102 - 20" x 25" x 5" Pleated Air Filter Cover
Trion Air Bear 255649-102 (2-Pack) - 20" x 25" x 5" Pleated Air Filter, MERV 8

Features
This Filter Is NOT A Direct Replacement For Lennox Or Honeywell Filters
Air Bear Filters Capture And Hold Pollutants Inside The Filter, Allowing Air To Flow Freely Through The System
Electrostatical, Charged Synthetic Material, Features Extended Surface Pleats That Have A Higher Dirt-Holding Capacity Than Competitive Filters
Electrostatical, Charged Synthetic Material, Features Extended Surface Pleats That Have A Higher Dirt-Holding Capacity Than Competitive Filters
#TOP 10

MERV 8 Air Vent Filters

MB-GLM2090BL
0.5" x 90" x 20"
MERV 8 Air Vent Filters Cover
MERV 8 Air Vent Filters, 20" x 90"Cut to Fit Air Filter Material (80+ Filters),Electrostatic Triple Vent Filter for Floor, Ceiling, HVAC & RV Vents, Includes 48 Adhesive Hook Tape

Features
MERV 8 Triple-Layer Filtration:Our Air Vent Filter Features MERV 8 Filtration To Block Up To 85% Of Airborne Particles. The 3-Layer Design Captures Both Large Debris And Tiny Dust, Ensuring Effective Filtration Without Restricting Airflow
Cleaner, Healthier Air:Breathe Easier With Our Air Vent Filters For Home. These Vent Filters For Home Floor Capture Dust, Pet Hair, Ect, Reducing Sneezing, Coughing, And Irritation. Ideal For A Cleaner, Healthier Indoor Environment
Easy Installation & Maintenance:Simply Measure, Cut, And Secure With Adhesive Hooks. Our Cut To Fit Air Filter Lasts 2-3 Months, Providing Hassle-Free, Long-Lasting Air Filtration For Your Home
Durable & Efficient Material:Made From High-Quality Air Filter Material, Our Floor Vent Filter Is Breathable, Durable, And Designed To Extend Your HVAC System's Lifespan While Reducing Maintenance Costs
Custom Fit For Any Vent:Easily Cut To Fit Air Filters For Floor Vent Filters, AC Vent Filters, And Mobile Home Furnace Filters. The 20" X 90" Roll Fits Various Vent Sizes, Including Vent Filters For Home Ceiling—just Trim To Size For A Perfect Fit
Buying Guide Image

Frequently Asked Questions (FAQs)

1. Are foam air filters better?

RECAP. Foam filters filter better than any other filter. Foam filters hold significantly more dirt than any other filter. Foam can be washed and reused hundreds of times.

2. What kind of foam is used for air filters?

Reticulated foam is the most common and most effective type of foam used for filtration because the reticulation process removes a portion of the foam's cell membranes and imprutities. The lattice-like appearance of reticulated polyurethane foam is particularly useful as a filter foam.

3. What is the best material for a furnace filter?

Disposable pleated filters are made of polyester or cotton paper sheets and are better at trapping particulates. They are generally rated from six to 13 on the MERV scale. Cotton filters have higher ratings and their fibers can self-charge to remove smaller particles from the air.

4. Are foam filters washable?

Using foam increases the filter's surface area and is washable, compared to standard paper and cotton filters which trap dust on the surface, become less efficient the more they are used and need to be replaced.

Editor's Notes

During our foam furnace filter research, we found 24 foam furnace filter products and shortlisted 10 quality products. We collected and analyzed 67,872 customer reviews through our big data system to write the foam furnace filters list. We found that most customers choose foam furnace filters with an average price of $24.53.

The foam furnace filters are available for purchase. We have researched hundreds of brands and picked the top brands of foam furnace filters, including AllergyZone, CoreCarbon, UBeesize, Filterbuy, Trion. The seller of top 1 product has received honest feedback from 503 consumers with an average rating of 4.8.

Written by
Howard Chester Avatar

Howard Chester is an architect from New York who holds a master's degree in architectural design, his passions for interior design and home improvement contribute to his extensive knowledge of all things furniture and home goods. Howard Chester Specializes in various architectural and interior design projects. He often publishes articles related to decoration on key websites and interior design magazines.