Best Furnace Filters of 2025

Howard Chester Avatar
Howard Chester
Last Updated: Jan 14, 2025

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Furnace filters are an essential component of any heating and cooling system. These filters work to trap and remove harmful particles like dust, pollen, and other pollutants from the air, ensuring that the air circulating throughout your home is clean and healthy. With a variety of options available, including disposable and reusable filters, it's easy to find the right furnace filter for your needs. Regularly replacing or cleaning your furnace filter can also help improve the efficiency of your HVAC system, saving you money on energy costs in the long run.

At a Glance: Our Top Picks

Filtrete 16x25x1 Air Filter MPR 300 MERV 5, Clean Living Basic Dust, 6-Pack Cover #TOP 1
Filtrete 16x25x1 Air Filter MPR 300 MERV 5, Clean Living Basic Dust, 6-Pack
ftb score rating icon 9.9
Simply 20x20x1 Air Filter Merv 8 Cover #TOP 2
Simply 20x20x1 Air Filter Merv 8
ftb score rating icon 9.8
Filtrete 16x25x1 AC Air Filter Cover #TOP 3
Filtrete 16x25x1 AC Air Filter
ftb score rating icon 9.6

Top 10 Furnace Filters

Filtrete 16x25x1 Air Filter MPR 300 MERV 5, Clean Living Basic Dust, 6-Pack

BD01-6PK-1E
White
16 x 25 x 1
Filtrete 16x25x1 Air Filter MPR 300 MERV 5, Clean Living Basic Dust, 6-Pack Cover
Filtrete 16x25x1 AC Furnace Air Filter, MERV 5, MPR 300, Capture Unwanted Particles, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 6-Pack (Actual Size15.69x24.69x0.81 in)

The Filtrete 16x25x1 Air Filter MPR 300 MERV 5 is a 3-month pleated 1 in. air filter for residential use only. It has an MPR rating of 300 and MERV rating of 5. Designed with exclusive 3M technology, it attracts and captures large particles such as lint, household dust, and dust mite debris. The higher the MPR, the more microparticles it will capture, such as pollen, pet dander, and smoke. Change the filter at least every 90 days for optimal performance and sign-up for a filter change reminder program. Create a change countdown in the Filtrete Smart app.

What We Like
Excellent air filtration
Easy installation
Durable and long-lasting
Cost-effective 6-pack
Improved airflow
What We Don't Like
Slightly bent edges on arrival
#TOP 2

Simply 20x20x1 Air Filter Merv 8

MF202016
White
20x20x1
Simply 20x20x1 Air Filter Merv 8 Cover
Simply 20x20x1 Air Filter, Merv 8, MPR 600, 6 Pack, Furnace Air Filter for HVAC (Actual Size: 19.75"x19.75"x0.75") DUST, Pet, & Allergy Control

The Simply Air Filter Merv 8 is designed to fit most HVAC systems, making it a versatile choice for your home or office. Its advanced pleated design captures dust, pet dander, and pollen, helping you breathe cleaner air. You’ll appreciate the long-lasting performance, as these filters can last up to three months, reducing the hassle of frequent replacements. Installation is a breeze, thanks to clear airflow arrows that guide you in placing it correctly. With 90% of airborne particles trapped, you can create a healthier living space for you and your family.

What We Like
Good quality construction
Effective dust and allergen filtration
Affordable pricing
Easy installation
Great air flow
What We Don't Like
Cardboard frame may warp
Requires more frequent changes

Filtrete 16x25x1 AC Air Filter

AD01-2PK-1E
White
16 x 25 x 1
Filtrete 16x25x1 AC Air Filter Cover
Filtrete 16x25x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 2 Pack (Actual Size 15.719 x 24.72 x 0.84 in)

The Filtrete AC Air Filter is designed to enhance your home's air quality. It captures unwanted particles, ensuring that you breathe cleaner air in your living space. With its precise dimensions, it fits well in various HVAC systems, making installation easy. The exclusive 3-in-1 technology effectively traps numerous microparticles, contributing to a fresher environment. For best results, remember to replace your filter every three months, helping maintain optimal air flow and reducing allergens in your home.

What We Like
Effective allergen capture
Improved air quality
Easy installation
Durable and long-lasting
Good value for money
What We Don't Like
May require frequent changes
#TOP 4

Filtrete AC Furnace Air Filter, 4-Pack (MPR 1000)

9801-4
16x25x1
16 x 25 x 1
Filtrete AC Furnace Air Filter, 4-Pack (MPR 1000) Cover
Filtrete 16x25x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 4 Pack (Actual Size 15.69 x 24.69 x 0.81 in)

The Filtrete AC Furnace Air Filter is designed with exclusive 3-in-1 technology to capture unwanted air particles and outperforms other 1 in. filters. With a MPR 1000 rating, it captures pollen, pet dander, smoke, bacteria, and viruses. For optimal performance, change the filter every 90 days to avoid slowing down air flow and wasting energy. Use the Filtrete Smart app to create a change countdown and receive reminders for filter replacement. Suitable for residential use only.

What We Like
Convenient bulk purchase
High-quality construction
Effective dust and allergen filtration
Visible replacement indication
Cost-effective compared to stores
What We Don't Like
Very slightly larger than some filters
#TOP 5

Filterbuy 16x25x1 Air Filter MERV 8 Dust Defense (4-Pack)

AFB16x25x1M8pk4
Silver
Filterbuy 16x25x1 Air Filter MERV 8 Dust Defense (4-Pack) Cover
Filterbuy 16x25x1 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 x 24.50 x 0.75 Inches)

Filterbuy 16x25x1 Air Filter MERV 8 Dust Defense (4-Pack) is a set of pleated HVAC AC furnace air filters designed to protect your home from dust, pollen, and more by trapping 90% of airborne particles without impacting air flow. It features MERV 8 synthetic media, electrostatically charged design, and dual wire backings that outperform standard cardboard designs. The set contains four high-quality replacement air filters with industrial-grade beverage board frames. All components are manufactured within the United States and designed with recyclable materials.

What We Like
Good price
Quality construction
Effective dust filtration
Long-lasting value
Quick shipping
What We Don't Like
Feels a bit flimsy
#TOP 6

Aerostar 16x25x1 MERV 8 Pleated Air Filter, 6 Pack

16x25x1 MERV 8
White
Aerostar 16x25x1 MERV 8 Pleated Air Filter, 6 Pack Cover
Aerostar 16x25x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 15 3/4"x 24 3/4" x 3/4"), White

The Aerostar 16x25x1 MERV 8 Pleated Air Filter comes in a pack of 6 and is designed to filter microscopic particles such as lint, dust mites, spores, and pollen. The 100% synthetic electrostatic media ensures high efficiency with low air flow resistance, and it's simple to install for a cost-effective step towards a healthier home environment. The filter is comparable with MPR 600 & FPR 5 and is manufactured by Filtration Group, a world-leading manufacturer and supplier of filtration solutions making the world safer, healthier & more productive. For best results, it's recommended to change filters every 60 to 90 days, with increased frequency to 30 days during peak summer and winter months.

What We Like
Convenient 6-pack
High quality, made in USA
Easy installation
Cost-effective option
Good filtration performance
What We Don't Like
Minor performance decline over time
May need higher MERV rating
#TOP 7

Filtrete 16x25x4 Air Filter, MPR 1000, MERV 11, Allergen Defense 12-Month Deep Pleated 4-Inch Air Filters, 4 Filters

NADP01-4IN-4
16x25x4
Filtrete 16x25x4 Air Filter, MPR 1000, MERV 11, Allergen Defense 12-Month Deep Pleated 4-Inch Air Filters, 4 Filters Cover
Filtrete 16x25x4 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Lennox & Honeywell Devices, Allergen Defense, Electrostatic Air Cleaning Filter, 4-Pack (actual size 15.88 x 24.56 x 4.31)

The Filtrete Air Filter is a 4-pack of 12-month pleated 4-inch filters that help capture unwanted particles from your household air, creating a cleaner and fresher home environment. With its exclusive Filtrete 3-in-1 technology, this air filter is designed to pull in and trap unwanted particles, allowing cleaner air to flow through. With a 1000 MPR and MERV 11 rating, it effectively captures many microparticles and large particles from the air passing through it, making the air cleaner. Compatible with Honeywell furnaces calling for a 4" filter and Lennox furnaces calling for a 5" filter, it offers versatile uses. For optimal performance, it is recommended to change the filter at least once every 12 months. Additionally, you can subscribe and save 10% on your orders. Filtrete is the No. 1 recommended HVAC Air Filter Brand, providing breakthrough technology to create a cleaner and healthier home for you and your family.

What We Like
Excellent air filtration
Long-lasting performance
Easy installation
Good value for money
Supports HVAC efficiency
What We Don't Like
May fit too snugly
Size discrepancies reported
#TOP 8

Filtrete 20x25x5 Air Filter

MPR 1000
White
20 x 25 x 5
Filtrete 20x25x5 Air Filter Cover
Filtrete 20x25x5 AC Furnace Air Filter, MPR 1000, MERV 11, Fits Lennox Devices, Allergen Defense, Electrostatic Air Cleaning Filter, 2-Pack (actual size 19.63 x 24.75 x 4.31 in)

The Filtrete Air Filter is designed to enhance your home's air quality. With its precise dimensions of 19.63 x 24.75 x 4.31 inches, it fits various air cleaning systems, ensuring a snug fit. Its advanced Filtrete 3-in-1 technology effectively captures unwanted particles, helping you breathe cleaner air. With a high MPR 1000 and MERV 11 rating, this filter captures twice as many microparticles compared to standard filters. Regularly changing your filter at least once a year will maintain optimal performance, making your home a healthier sanctuary.

What We Like
High quality filter
Less dust in air
Easy to fit
Great value for odd size
Good price
What We Don't Like
Inconsistent sizing
Tight fit for some
#TOP 9

CoreCarbon 20x30x1 Filter Media

TX2030CTF-FBA
20" x 30" x 1"
CoreCarbon 20x30x1 Filter Media Cover
CoreCarbon 20x30x1 Cut To Fit Furnace & Air Conditioner Washable Reusable High Air Flow Polyester Fiber Filter Media (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
What We Don't Like
Washing can be time-consuming
#TOP 10

Filterbuy 16x25x4 Air Filter MERV 8 (2-Pack)

AFB16x25x4M8pk2
Silver
Filterbuy 16x25x4 Air Filter MERV 8 (2-Pack) Cover
Filterbuy 16x25x4 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 15.50 x 24.50 x 3.63 Inches)

The Filterbuy 16x25x4 Air Filter MERV 8 (2-Pack) is a replacement air filter for HVAC systems that protects homes from dust, pollen, and more by trapping 90% of airborne particles. The electrostatically charged, pleated design captures more harmful particles and prolongs the product's lifespan by three times that of fiberglass models. The industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs, and all components are made in the US with recyclable materials.

What We Like
Easy to find non-standard sizes
Timely delivery
Good price and quality
Effective for respiratory health
Durable pleated design
What We Don't Like
Potential fit issues for 4.5 inches
Inconsistent filter material quality
Buying Guide Image

Everything You Need to Know About Furnace Filters

Introduction

Choosing the right furnace filter for your home's heating and cooling system can be a daunting task. With so many different options available, it's important to know what to look for to ensure you're getting the best filter for your needs. In this article, we'll provide some tips to help you make an informed decision and choose the right furnace filter for your home.

Consider Your Home's Unique Needs

The first step in choosing a furnace filter is to consider the unique needs of your home. This includes factors such as the size of your home, the type of heating and cooling system you have, and the level of air pollution in your area. By taking these factors into account, you'll be able to narrow down your options and choose a filter that is specifically designed to meet your needs.

Choose the Right Size

Another important factor to consider when choosing a furnace filter is the size of the filter. The size of the filter you need will depend on the size of your furnace and the size of your home. To determine the size of filter you need, measure the width, height, and depth of your current filter and compare it to the sizes available from the manufacturer you're considering. It's important to choose a filter that is the correct size, as using a filter that is too small can restrict air flow and reduce the efficiency of your heating and cooling system.

Consider the Filter's Efficiency Rating

When choosing a furnace filter, it's important to consider the filter's efficiency rating. The efficiency rating of a furnace filter indicates how well it is able to remove particles from the air. A higher efficiency rating means the filter is better able to remove particles, such as dust, pollen, and pet dander, from the air. The most common efficiency rating for furnace filters is the Minimum Efficiency Reporting Value (MERV) rating. The higher the MERV rating, the better the filter is at removing particles from the air.

Choose the Right Type of Filter

In addition to considering the size and efficiency rating of a furnace filter, it's also important to choose the right type of filter for your needs. The most common types of furnace filters are disposable fiberglass filters and washable electrostatic filters. Disposable fiberglass filters are inexpensive and easy to replace, but they have a lower efficiency rating and are not as effective at removing particles from the air. Washable electrostatic filters are more expensive, but they have a higher efficiency rating and are more effective at removing particles from the air.

Conclusion

Choosing the right furnace filter for your home's heating and cooling system is an important decision. By considering your home's unique needs, choosing the right size and efficiency rating, and selecting the right type of filter, you can ensure that your furnace filter is effective at removing particles from the air and keeping your home's air clean and healthy.

Frequently Asked Questions (FAQs)

1. How often should furnace filters be changed?

The frequency of changing furnace filters depends on their size. For 1- to 2-inch filters, it is recommended to replace them every 1 to 3 months. For 3- to 4-inch filters, replace them every 6 to 9 months. And for 5- to 6-inch filters, they should be replaced every 9 to 12 months. Regularly changing furnace filters ensures proper airflow and helps maintain the efficiency of the heating system.

2. How long does the average furnace filter last?

The lifespan of furnace filters can vary based on their thickness. A 1-inch filter typically lasts 1 to 3 months, while a 3 to 4-inch filter can last 6 to 9 months. Thicker 5 to 6-inch filters have a longer lifespan of 9 to 12 months. It is important to follow the manufacturer's recommendations and replace the filters accordingly for optimal performance.

3. What are the differences in furnace filters?

There are different types of furnace filters available. Pleated filters, for example, are denser than fiberglass filters and have a wavy design that increases their surface area to capture more dust. They usually have higher MERV ratings and are cost-efficient. The price of furnace filters may vary based on factors like quality, size, and manufacturer.

4. What happens to your furnace if you don't change the filter?

Not changing the furnace filter can lead to damage to the heating system. Over time, the accumulation of dirt and dust in the filter restricts airflow, causing the system to overheat. This can result in costly repairs or even the need to replace the entire HVAC unit. Regularly changing the furnace filter is essential for maintaining the efficiency and longevity of the system.

5. How can I tell if my furnace filter needs changing?

There are several signs that indicate the need to change the furnace filter. These include noticeable discoloration on the filter, visible dirt and dust buildup, frequent need for dusting in the home, longer HVAC system cycles, and realizing that it has been several months since the filter was last replaced. Regular inspection and replacement of the filter based on these signs help ensure proper filtration and airflow.

6. What is the difference between cheap and expensive furnace filters?

One of the main differences between cheap and expensive furnace filters is their longevity. Cheap filters are often made from lower-quality materials like cardboard and paper, which have a shorter lifespan. Expensive filters are typically made with higher-quality materials and can last longer. While cheap filters may seem more cost-effective initially, the need for more frequent replacements can end up costing more in the long run.

7. Do premium furnace filters make a difference?

Premium furnace filters with higher MERV ratings can capture finer particles from the air compared to lower-rated filters. However, these high-rated filters are denser and thicker, which can make it harder for air to pass through. It is important to consider the specific needs of your HVAC system and consult with a professional to determine the most suitable filter for your home.

Editor's Notes

During our furnace filter research, we found 24 furnace filter products and shortlisted 10 quality products. We collected and analyzed 1,422,794 customer reviews through our big data system to write the furnace filters list. We found that most customers choose furnace filters with an average price of $34.84.

The furnace filters are available for purchase. We have researched hundreds of brands and picked the top brands of furnace filters, including Filtrete, Simply, Filterbuy, Aerostar, CoreCarbon. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

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.

Furnace Filters Comparison Table

#TOP1
#TOP2
#TOP3
#TOP4
#TOP5
#TOP6
#TOP7
#TOP8
#TOP9
#TOP10
Brand Filtrete Simply Filtrete Filtrete Filterbuy Aerostar Filtrete Filtrete CoreCarbon Filterbuy
Material Electrostatically charged filter media Paper, Cardboard Polyester Polyester, Fiberglass Polypropylene, Aluminum, Plastic Polypropylene Polypropylene Polypropylene Polyester Polypropylene, Aluminum, Plastic
Compatible Devices Air Conditioner, Furnace Air Conditioner, Heat Pump, Furnace Air Conditioner, Furnace Air Conditioner, Furnace Air Conditioner, Heat Pump, Air Cleaner, HVAC System, Furnace Air Conditioner, Furnace Air Conditioner, Furnace Air Conditioner, Furnace Furnace, Air Conditioner Air Conditioner, Heat Pump, Air Cleaner, HVAC System, Furnace
Item Weight 3.1 Pounds 3 Pounds 16 ounces 3 Pounds 0.01 Ounces 1.48 Pounds 2 Pounds 2.77 Kilograms 7.37 ounces 6 Pounds
MERV Rating 5 8 11 11 8.0 8 11 11 - 8.0
Global Trade Identification Number 00076308414474, 00638060262788 00810133787262 00638060656334 00051141915265 - 00192212001125 50076308870916 50076308413922 - -
Product Grade - - like new - Replacement Parts - Replacement Part new Replacement Part Replacement Parts
FTB Score
ftb score rating icon 9.9
ftb score rating icon 9.8
ftb score rating icon 9.6
ftb score rating icon 9.4
ftb score rating icon 9.3
ftb score rating icon 9.1
ftb score rating icon 8.9
ftb score rating icon 8.8
ftb score rating icon 8.6
ftb score rating icon 8.5
Where to Buy