10 bestFurnace Filtersof June 2025
112M consumers helped this year.
1
Lennox Healthy Climate 16x25x5 X6670 MERV 11 Filter-Actual Size 15 3/4" x 24 3/4" x 4 3/8". Pack of 3.
Healthy Climate
10.0
17% off
2
Filtrete 16x25x1 Furnace Filter, MPR 1500, MERV 12, Healthy Living Ultra-Allergen 3-Month Pleated 1-Inch Air Filters, 2 Filters
Filtrete
10.0
3
Filtrete 16x24x1 Furnace Filter, MPR 1000, MERV 11, Clean Living Basic Dust 3-Month Pleated 1-Inch Air Filters, 6 Filters
Filtrete
9.7
4
United Filter Compatible with Honeywell 16x25x5 (15-7/8" x 24-7/8" x 4-3/8") X6670 Furnace Air Filter MERV 11 Pleated (3-Pack) - HVAC Filters Captures Airborne Dust, Pollen, Mould & Smoke
United Filter
9.5
5
Lennox Healthy Climate 20 x 25 x 5 Part # X6673 MERV 11 Model HCF 20-11 Case of 3
Healthy Climate
9.2
OtherUp to 22% off
MORENTO 2 Pack HY4866 Genuine Air Purifier Replacement Filter for HY4866 Air Purifier, Enhanced Version
MORENTO 2 Pack HY4866 Genuine Air Purifier Replacement Filter for HY4866 Air Purifier, Original Version
CHIVALZ Humidifier Replacement Filters 10 Pack + Aroma Pads 10 Pack, Compatible with YZY6001 Humidifier, Improve Humidification Efficiency, Aroma for Home Bedroom
HATHASPACE Certified Replacement Filter for HSP003 Dual Filtration HEPA Air Purifier, 1 Set (H13 True HEPA)
6
Lennox x6670 HCF 16-11 MERV 11 16x25x5 Aftermarket/Generic. Actual Size 15 3/4" x 24 3/4" x 4 3/8". Case of 3 Made in Canada by Furnace Filters.Ca
FurnaceFilters.Ca
8.9
7
Filtrete 20x25x4 Furnace Filter, MPR 1000, MERV 11, Clean Living Basic Dust 3-Month Pleated 4-Inch Air Filters, 4 Filters
Filtrete CA
8.7
5% off
8
Filtrete 16x25x4 Furnace Filter, MPR 1000, MERV 11, Allergen Defense 12-Month Deep Pleated 4-Inch Air Filters, 4 Filters
Filtrete
8.4
9
Filtrete 14x25x1 Furnace Filter, MPR 1500, MERV 12, Clean Living Basic Dust 3-Month Pleated 1-Inch Air Filters, 6 Filters
Filtrete
8.1
10
Honeywell Home FC100A1037 20x25x4 | MERV 11 ) Actual size : 19-7/8" x 24-3/4" x 4-3/8" MULTI PACK (3)
Honeywell Home
7.8
A Guide to Selecting the Best Furnace Filters
Choosing the right furnace filter is important for maintaining good air quality in your home and ensuring your heating system runs efficiently. The right filter can help trap dust, pollen, pet dander, and other particles, making the air cleaner and healthier to breathe. When picking a furnace filter, it's important to understand the different features and specifications so you can select one that matches your needs and your furnace's requirements.
Filter Size
Filter size refers to the length, width, and thickness of the filter, usually measured in inches. This is important because your furnace is designed to fit a specific size, and using the wrong size can lead to air bypassing the filter or the filter not fitting at all. Sizes are often printed on the old filter or listed in your furnace manual. To pick the right one, measure your existing filter or check your furnace’s documentation, and always use the exact size recommended.
MERV Rating
MERV stands for Minimum Efficiency Reporting Value, and it measures how effectively a filter captures particles. The scale typically ranges from 1 to 16, with higher numbers trapping smaller particles. Lower MERV ratings (1-4) capture only large particles and are suitable for basic dust protection. Mid-range (5-8) filters are good for most homes, capturing dust, pollen, and mold spores. Higher MERV ratings (9-12) are better for people with allergies or pets, while the highest ratings (13-16) are used in hospitals or for those with severe allergies. Choose a MERV rating based on your air quality needs, but make sure your furnace can handle higher ratings, as they can restrict airflow.
Filter Material
Furnace filters are made from different materials, such as fiberglass, pleated paper, or synthetic fibers. Fiberglass filters are basic and inexpensive, but they only catch larger particles. Pleated filters, made from paper or synthetic materials, have more surface area and can trap smaller particles, making them better for improving air quality. If you have allergies or pets, pleated filters are usually a better choice. Consider your air quality needs and how often you want to change the filter when choosing the material.
Disposable vs. Reusable
Some furnace filters are designed to be thrown away after use, while others can be washed and reused. Disposable filters are convenient and easy to replace, but they create more waste. Reusable filters can save money over time and are more environmentally friendly, but they require regular cleaning and maintenance. If you prefer less maintenance, disposable filters may be best, but if you want to reduce waste and don’t mind cleaning, reusable filters are a good option.
Change Frequency
How often you need to change or clean your filter depends on the type and your home environment. Some filters need to be replaced every month, while others can last up to six months. Homes with pets, smokers, or allergy sufferers may need more frequent changes. Check the manufacturer’s recommendations and consider your household’s needs to decide how often you should replace or clean your filter.
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