DiscountFurnaceFilter.com Promo Codes and Coupons September 2025

DiscountFurnaceFilter.com

DiscountFurnaceFilter.com is an online retailer specializing in affordable HVAC filters and air filtration products for residential and commercial use. They offer a wide selection of furnace filters in various sizes and MERV ratings, providing customers with quality air filtration solutions at competitive prices.

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Today's DiscountFurnaceFilter.com discount codes

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5% off

220 uses

high

worked 25 days ago

5% Off Storewide at DiscountFurnaceFilter. com

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1454 uses

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138 uses

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worked 25 days ago

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$10 off

140 uses

high

worked 24 days ago

$10 Off (Storewide) (Minimum Order: $100) at DiscountFurnaceFilter. com

Featured DiscountFurnaceFilter.com Products

Lennox X6675 Air Filter – Lennox X6675 Healthy Climate Filter Replacement

Lennox X6675- 20" x 25" x 5" Healthy Climate Carbon Clean HCF20-16 Air Filter, MERV 16 The Lennox X6675 Air Filter - MERV 16 - 20" x 25" x 5" is unique in that it offers a carbon-coated filter matrix. It’s dark gray color comes from the carbon and offers added ozone and odor reduction capabilities to the industry’s highest efficiency air filter. Nominal Filter Dimensions: 20" x 25" x 5" Actual Filter Dimensions: 19-3/4" x 24-3/4" x 4-3/8" Filter Recommended Replacement: Every 9 months The Lennox X6675 air filter is a genuine, OEM Lennox X6675 Healthy Climate Carbon Clean MERV 16 filter. The electrostatic media captures viruses, bacteria, dander, pollen, dust, and many odor-causing agents. These highly efficient filters maintain airflow while offering air pure enough for hospital rooms and reduce ozone. The carbon technologies make this the best filter (short of a HEPA) available, maintaining optimal health and comfort in your home. Some of the features that make the Lennox X6675 unique include: 50% First-pass reduction of ozone Hospital inpatient / general surgery level filtration Removes over 95% of (sub-micron) particles down to 0.3 microns Removes over 90% of ultra-fine particles down to 0.1 microns including viruses and bacteria Includes a carbon-coated fiber matrix to trap and capture odors If you need an additional layer of protection in your home for allergies, asthma or other breathing conditions, this is the best Lennox filter you can choose. The Lennox X6675 MERV 16 filter is a suitable replacement filter for the Lennox HCC20-28 air cleaner as well as many Honeywell, Carrier, and Trion Air Bear air cleaners that accept a 20" x 25" x 5" filter media. The Lennox 6675 air filter is designed to fit the following air cleaners: Lennox: HCC20-28 Honeywell: F25A1068, F25F1067, F35F1024, F100F1038, F150E1034, F200E1037 Carrier: EZXCAB020, MACA020, MPKA020, FILCAB020 Trion Air Bear: 453000-001, Supreme 2000, 455602-001, 447380-002 These high-efficiency Lennox X6675 filters can be purchased in single, double or five-packs to ensure you have a replacement on-hand at all times. What do the Numbers and Information Mean on Lennox Furnace Filters? The Lennox Healthy Climate filters are designed to offer a high-efficiency option for home-owners. MERV stands for the Minimum Efficiency Rating Value and is a scale from about 1 to 20. The scale represents the level at which a replacement filter is removing small particles out of the air each time it passes through the filter. In general, a rating higher than 7 is designed to protect and improve air quality within a home. Ratings from around 11-13 are designed to be highly efficient and are ideal for those with severe allergies or breathing issues. The MERV-16, which is what the Lennox X6675 Air Filter is, offers the highest efficiency outside of a HEPA filter and is safe enough to use in hospitals, homes and more. How Often Should I Replace My Lennox X6675 Filter? Typically, 5” furnace filters should be changed every 12 months or when showing obvious signs of being dirty. However, with the Lennox X6675 filter, we recommend you replace it every 9 months to ensure it is running effectively and filtering the air as much as possible within your home. When an air filter is clogged or dirty it is not efficiently filtering out air particles, which could put individuals with allergies at higher risk. Not to mention, a clogged filter can cause lasting damage to your filter and actually decrease its overall lifespan. When air can’t pass through the furnace, it traps heat in your system and can lead to a variety of issues. Why Choose DiscountFurnaceFilter? When it comes to purchasing furnace filters, we understand you have a lot of options available to you. We make the process as simple as possible by offering new OEM air filters that ship quickly. We keep Lennox X6675 air filters in stock and can ship them the same day before 5 pm. All orders over $50 ship FREE (Contiguous U.S.) making DiscountFurnaceFilter your #1 source for low price furnace filters. Have a question? Feel free to click here to contact our Sales Department or call 888-623-4678.

USD 113.91

Trion Air Bear 255649-101 - Pleated Air Filter 16"x25"x3" MERV 8

Trion 255649-101 Air Bear Cub MERV 8 Replacement Media Filter - 16" x 25" x 3". Brand new, genuine Trion product. DiscountfurnaceFilter.com is the web's #1 source for the Trion 255649-101 MERV 8 filter. Order your Trion 255649-101 MERV 8 filter today and receive fast, efficient, FREE Shipping on Orders Over $50 (Contiguous U.S.)! This is a genuine, factory direct OEM Trion replacement filter for the Air Bear Cub Air Cleaner. Filter Nominal Dimensions: 16" x 25" x 3"Actual Filter Dimensions: 15.75" x 24.25" x 3" Dimensions do not include a 0.25-inch gasket located along the top and bottom edges of the filter *Does not replace Lennox Healthy Climate filters It is recommended to change this MERV 8 filter every 6 - 12 months This filter does not replace a Lennox Healthy Climate Filter, the actual dimensions are different For questions or information regarding this product:Click Hereto contact our Sales Department or call 888-623-4678.

USD 29.27

Aprilaire 213 Filter

A small change can make a big difference in the health of your home environment. Aprilaire delivers that difference with the Aprilaire MERV 13 Healthy Home Filters. It removes common airborne allergens including dust, pollen, mold spores, bacteria, pet dander, and dust mites as they pass through the MERV 13 filter. SPECIFICATIONS: Nominal Measurements: 20H x 25W x 4D (inches) Actual Measurements: 20.6H x 26.63W x 4D (inches) Compatible Models: 1210, 1620, 2120, 2200, 2210, 2216, 3210, 4200, Space-Gard 2200 with Upgrade Kit 1213 MERV Rating: 13 Recommended Replacement Schedule: 12 Months Materials: Synthetic Fiber Contaminants Removed: Airborne Particles, Airborne Allergens, Dust, Pollen, Mold Spores, Bacteria, Pet Dander, Dust Mites In addition, your HVAC system is protected from airborne particles, which helps lower your energy costs and can prolong the life of your equipment. This replacement filter is easy to install, with no assembly or reinforcements to worry about. Our ‘Pure Fit Promise’ means this genuine Aprilaire filter will fit your Aprilaire air purifier exactly, and the patented Self-Seal Technology prevents contaminated impure air from bypassing the filter. Discover a healthier home environment with an Aprilaire MERV 13 Healthy Home Filter Replacement. Note: MERV is a scale used to measure the effectiveness of air filters. Higher number values translate to more effective filtration. Choose the Aprilaire Filter with the MERV rating that fits the needs of your family and home. *Performance tested to ASHRAE 52.2 BUY WITH CONFIDENCE This genuine replacement air filter was designed and manufactured in the U.S.A. by Aprilaire – the leader in indoor air quality solutions, to optimize the performance of your Aprilaire Air Purifier Model: 1210, 1620, 2210, 2216, 3210, 4200, Aprilaire or Space Gard 2200 with upgrade kit CREATE A HEALTHIER HOME by preventing airborne allergens from circulating through the air in your home by trapping common airborne allergens as they pass through the MERV 13 filter including dust, pollen, mold spores, bacteria, pet dander, and dust mites BETTER PERFORMANCE thanks to the patented Aprilaire Self-Seal Technology which minimizes the amount of air bypassing the filter EASY AS 1-2-3 TO INSTALL in the unique Aprilaire Interlock Rail System. Unpack. Slide in. Close the door. Done. WORRY FREE We stand behind the performance of our air filters with our 10-year Clean-Coil Commitment

USD 71.90

AprilAire 720A Whole-House, Fan-Powered Evaporative Humidifier – 21 Gallons Per Day, Water Saving With Automatic Digital Control for up to 6,250 Sq. Ft., Part of the AprilAire Healthy Air System

The AprilAire 720A Whole-House, Fan-Powered Evaporative Humidifier is an advanced solution designed to deliver optimal humidity control for homes up to 6,250 square feet. With the ability to provide 21 gallons of humidification per day, this industry-leading unit ensures rapid and balanced humidity, crucial for reducing respiratory infections, allergies, and asthma symptoms by minimizing bacteria, viruses, fungi, and dust mites throughout the entire home. The AprilAire 720A is built with sustainability in mind, featuring a re-circulation valve that reduces wastewater by 60% compared to previous models. Its one-piece disposable HydroCore™ cartridge, made with recycled plastic, simplifies annual maintenance. The humidifier includes automatic digital control, which adjusts humidity levels based on outdoor temperatures, and also includes a manual mode for customized settings. Enhanced with a hybrid fan, the unit boasts twice the evaporative efficiency of earlier models, ensuring even air distribution and superior performance. The reversible design accommodates various installation configurations, while additional features like leak protection, reduced noise, and a distribution tray that allows for slight mis-alignments during installation help minimize service callbacks. Designed and assembled in the USA utilizing US and global components and backed by a 5-year warranty, the AprilAire 720A provides reliable, high-quality humidification, complete with all necessary components for easy setup. Model 720A Features: HUMIDITY FOR HEALTH – Achieve balanced humidity in the home which has been shown to reduce the incidence of respiratory infections and symptoms related to allergies and asthma by minimizing the formation of bacteria, viruses, fungi, and dust mites INDUSTRY-LEADING CAPACITY – Delivers 21 gallons per day of humidification and balances humidity quicker than ever to satisfy larger homes 60% LESS WASTEWATER* – Built with superior sustainability in mind. The innovative recirculation valve recycles water to deliver 3X more water across the panel*, while simultaneously reducing wastewater ONE-PIECE HYDROCORE™ – The one-piece disposable HydroCore™ water panel cartridge quickly pops in and out for fast replacement and is made with recycled plastic. Annual maintenance is now easier than ever. AUTOMATIC CONTROL – The included digital control provides convenient operation by automatically adjusting humidity levels based on outdoor temperature in Automatic Mode, while also offering Manual Mode for customized control. The large, blue LED backlit LCD display includes the relative humidity percentage and set point adjustments. 2X MORE EVAPORATIVE EFFICIENCY** – The 720A Humidifier features a hybrid fan that maximizes even distribution of air across the panel for increased output and efficiency REVERSIBLE DESIGN –The fan module can be reconfigured to fit tight installs and optimize performance on any furnace configuration, including horizontal. Easily install with the fan on the left (standard configuration) or right (reconfigured). DISTRIBUTION TRAY – The distribution tray allows installation to be up to 3 degrees out of level LEAK PREVENTION – Designed to reduce leaks with catch-all drain PART OF THE APRILAIRE HEALTHY AIR SYSTEM – The 720A Humidifier is a part of your one-stop, all purpose investment toward a greater quality of life. The AprilAire Healthy Air System (additional components sold separately) combines fresh air ventilation, air filtration, humidity control, radon control, zoning and IAQ control, and UVC sanitization to address all aspects of Indoor Air Quality in the home. BUY WITH CONFIDENCE – AprilAire Whole-House Humidifiers are designed and assembled in the USA utilizing US and global components by AprilAire, the leader in Indoor Air Quality solutions for the home since 1954, and come with a 5-year warranty Included in Box: 720 Humidifier 60 Automatic Digital Control HYDROL L HydroCore 4010 24VAC 10VA Transformer 4001 Saddle Valve Owner's Manual Installation Template Specifications: Materials: Polycarbonate, Plastic Actual Measurements: 18H x 16.5W x 10.5D (inches) * Compared to AprilAire 700 Humidifier** On high speed vs. AprilAire 700 Humidifier

USD 459.99

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6 uses

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More DiscountFurnaceFilter.com Products

Aprilaire 413 - Healthy Home Air Filter For Aprilaire Whole-Home Air Purifiers

A small change can make a big difference for the health of your home environment. Aprilaire delivers that difference with the Aprilaire MERV 13 Healthy Home Filters. It removes common airborne allergens including dust, pollen, mold spores, bacteria, pet dander, and dust mites as they pass through the MERV 13 filter. Nominal Measurements: 16H x 25W x 4D (inches) Actual Measurements: 16.52H x 29.38W x 4D (inches) MERV Rating: 13 BUY WITH CONFIDENCE This genuine replacement air filter was designed and manufactured in the U.S.A. by Aprilaire – the leader in indoor air quality solutions, to optimize the performance of your Aprilaire Air Purifier Model: 1410, 1610, 2410, 2416, 3410, 4400, Aprilaire or Space Gard 2400 with an upgrade kit CREATE A HEALTHIER HOME by preventing airborne allergens from circulating through the air in your home by trapping common airborne allergens as they pass through the MERV 13 filter including dust, pollen, mold spores, bacteria, pet dander, and dust mites BETTER PERFORMANCE thanks to the patented Aprilaire Self-Seal Technology which minimizes the amount of air bypassing the filter EASY AS 1-2-3 TO INSTALL in the unique Aprilaire Interlock Rail System. Unpack. Slide in. Close the door. Done. WORRY FREE We stand behind the performance of our air filters with our 10-year Clean-Coil Commitment PROUD PARTNER OF AMERICAN LUNG ASSOCIATION AprilAire’s mission is to enhance everyone’s health by improving the air in their homes In addition, your HVAC system is protected from airborne particles, which helps lower your energy costs, and can prolong the life of your equipment. This replacement filter is easy to install, with no assembly or reinforcements to worry about. Our ‘Pure Fit Promise’ means this genuine Aprilaire filter will fit your Aprilaire air purifier exactly, and the patented Self-Seal Technology prevents contaminated impure air from bypassing the filter. Discover a healthier home environment with an Aprilaire MERV 13 Healthy Home Filter Replacement. Note: MERV is a scale used to measure the effectiveness of air filters. Higher number values translate to more effective filtration. Choose the Aprilaire Filter with the MERV rating that fits the needs of your family and home. *Performance tested to ASHRAE 52.2 Standard, minimum efficiency reporting value – MERV 13

USD 67.12

Lennox X8795 - Healthy Climate PureAir Annual Maintenance Kit for PCO20-28

Lennox PureAir maintenance kit – X8795 Healthy Climate for PCO20-28. DiscountfurnaceFilter.com is the web's #1 source for Lennox PureAir maintenance kit supplies. Order your X8795 - Healthy Climate PureAir Annual Maintenance Kit for PCO20-28 today and receive fast, efficient, FREE Shipping on Orders Over $50 (Contiguous U.S.)! The X8795 Lennox PureAir maintenance kit has everything you need for annual maintenance. It includes: 1 - 20" x 26 "x 5" filter - X8788 1 - catalyst - X8791 2 - UV lamps - X8794 The PureAire air purification system helps control everything from microscopic dust mites and mold spores to infectious bacteria and viruses. It is the only indoor air quality system that safely removes and destroys odors and chemical vapors. It also reduces concentrations of pollutants through a process called photocatalytic oxidation (PCO) that combines three of nature's most powerful air purifiers: Ultraviolet light Titanium dioxide catalyst Hydroxyl radicals Taking regular care of your system ensures your home’s air quality will stay high. Get your Lennox PureAir maintenance kit today and be ready for this year’s replacement. We maintain the lowest price on the web for this item! If you find a legitimately lower advertised price on this item (including S&H), Click Here to contact our Sales Department so we can beat the price.

USD 206.81

Trion Air Bear 255649-102 - Pleated Air Filter 20"x25"x5" MERV 8

Trion 255649-102 Air Bear Supreme MERV 8 Replacement Media Filter - 20" x 25" x 5". Brand new, genuine Trion product. DiscountfurnaceFilter.com is the web's #1 source for the Trion 255649-102 MERV 8 filter. Order your Trion 255649-102 MERV 8 filter today and receive fast, efficient, FREE Shipping on Orders Over $50 (Contiguous U.S.)! This is a genuine, factory direct OEM Trion replacement filter for the Air Bear Supreme Air Cleaner. Nominal Filter Dimensions: 20" x 25" x 5" Actual Filter Dimensions: 19.75" x 24.25" x 4 .875" Does not replace Lennox Healthy Climate filters For questions or information regarding this product:Click Here to contact our Sales Department or call 888-623-4678.

USD 34.04

Totaline P101-2025M - 20" x 25" Star Series Electronic Air Cleaner Media Pads, 3-Pack (6 Pads)

Totaline P101-2025M - 20" x 25" Star Series Electronic Air Cleaner Media Pads, 3-Pack (6 Pads) Disposable Replacement Media Pads The Totaline Star SERIES CG1000 creates a polarized charge on the media pads, causing airborne particles to “stick” to the pads. This provides a means of disposing of the particles and removing them as the media pads are replaced. Recommended replacement is every 4 months. Actual Dimensions:19 5/8" x 24 5/8" Hypo Allergenic Material High Density Fire Retardant Unique Dry Weave Material Pre-Cut to Size Highest Surface Area Safe, Simple Replacement 1 package contains 6 pads (2 pads required per changeout)

USD 43.99

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93 uses

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Sustainability Score

42%

While the company offers products that contribute to better air quality, their corporate sustainability practices lack transparency. Limited information is available about their supply chain ethics, manufacturing processes, and environmental initiatives. The company has not published comprehensive ESG reports or clear sustainability goals. Some recycling programs exist for packaging, but overall environmental commitment appears minimal. Labour practices and animal welfare policies are not publicly disclosed.

About DiscountFurnaceFilter.com

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FAQs

: The best discounts typically occur during seasonal changes (spring and fall), Black Friday, and Cyber Monday. We also offer special promotions during off-peak seasons (summer and winter).
: Yes, we offer tiered discounts starting at 5% off for orders of 6+ filters, 10% off for 12+ filters, and custom quotes for larger commercial orders.
: Yes, customers who sign up for our filter subscription service receive 15% off regular prices and free shipping on recurring orders.
: Yes, we offer price matching on identical products from authorized retailers within 30 days of purchase.
: In the past month, DiscountFurnaceFilter.com has launched 9 new promo coupons for shopper discounts. This indicates that DiscountFurnaceFilter.com provides regular opportunities for customers to save money on their purchases.
: On average, DiscountFurnaceFilter.com provides 5 discount coupons each month. Based on historical data, the average time between DiscountFurnaceFilter.com coupon releases every 6 days. However, this rate depends on various factors such as seasonal promotions (Black Friday, Cyber Monday, etc.), product launches, or other marketing initiatives. To stay informed about upcoming discounts and promotions, we recommend checking DiscountFurnaceFilter.com website regularly, subscribing to email newsletters, and following them on social media.
: DiscountFurnaceFilter.com is offering 4 working store-wide codes, however they are also offering 16 additional discount codes with a best discount of 5% off
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Curated by

Linda S.

Content Writer

Last updated September 2025

This page was curated by Linda, a savings and discount enthusiast from sunny Sarasota, Florida. With a keen eye for unbeatable deals, Linda ensures that all codes are checked and curated daily. She's also a certified yoga instructor who loves to share wellness tips. Check back tomorrow for more savings and perhaps a little zen!

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From the blog

2025-04-29

DiscountFurnaceFilter.com Promo Codes and Coupons September 2025