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Low Prices, Fast Shipping, and Over 50 Years of Experience in the Heating, Cooling, & Indoor Air Quality Business. Count on us for an expert recommendation!
We Specialize In Lennox & Aprilaire Products. Begin Shopping Below!
Lennox Products

Check out our Lennox furnace filters, Lennox thermostats and Lennox humidifiers! Lennox products are known for outstanding quality and performance.
Aprilaire Products
We carry a wide selection of Aprilaire humidifiers, humidifier water panels and Aprilaire & Space Gard filters! Aprilaire humidifiers are the most popular and reliable whole-house humidifier on the market.

Featured Products



Aprilaire Replacement Water Panel (RP #35) For 560/600/700/Lennox WB2-17/WP2-18 Humidifier Aprilaire Replacement Water Panel (RP #10) For Model 500 / 550 / Lennox WB2-12 Humidifier
List Price: $19.50
Our Price: $13.75
List Price: $19.50
Our Price: $12.75
Aprilaire / Lennox Replacement Water Panel For 600 / 700 / WB2-17 / WB2-18 Humidifier. Fits Aprilaire 600, 600A, 600M, 700, 700A, 700M and Lennox WB2-17 bypass humidifiers and Lennox WB2-18 power humidifier. Aprilaire / Lennox Replacement Water Panel For 500A / 500M / 500 / 550 / WB2-12 Humidifier. Fits the Aprilaire 500, 550 and Lennox WB2-12 bypass humidifiers.
Aprilaire 600A Humidifier (Automatic Control) (2-PACK) Lennox PMAC-12C Replacement Filters - X0444
List Price: $289.95
Our Price: $162.00
List Price: $91.90
Our Price: $53.17
Lennox PMAC-12C Replacement Filter - X0444
The Aprilaire 600A Humidifier - automatic humidification for homes up to 4,000 square feet. Convenient 2-PACK of Lennox PMAC (Pleated Media Air Cleaner) MERV 10 replacement furnace filters - X0444
Aprilaire 700A Power Humidifier (Automatic Control) Lennox X6672 HCF16-16 MERV 16 Replacement Filter 16" x 25" x 5"
List Price: $329.95
Our Price: $234.00
List Price: $134.95
Our Price: $94.95
Lennox H/C HCF16-16 MERV 16 REPL FLTR 16X25X5
The Aprilaire 700A Power Humidifier - automatic humidification for homes up to 4,200 square feet. Lennox Healthy Climate HCF16 Merv 16 replacement furnace filter - X6672. Filter dimensions: 16" x 25" x 5".
(2-PACK) Lennox PMAC-20C Replacement Filters - X0445 Lennox X6675 HCF20-16 MERV 16 Replacement Filter 20" x 25" x 5"
List Price: $91.90
Our Price: $53.17
List Price: $134.95
Our Price: $94.95
Lennox PMAC-20C Replacement Filter - X0445 Lennox X6675 Furnace Filter
Convenient 2-PACK of Lennox PMAC (Pleated Media Air Cleaner) MERV 10 replacement furnace filters - X0445 Lennox Healthy Climate HCF20 Merv 16 replacement furnace filter - X6675. Filter dimensions: 20" x 25" x 5".

Customer Feedback

Whole House Furnace and Humidifier Filters, Honeywell Thermostats, Aprilaire 700 and 5000, and Goodman Air Conditioners

Aprilaire, Goodman, and Lennox Filters and Humidifiers and Air Bear Filters

Welcome to DiscountFurnaceFilter.com! This is the place to find a large selection of indoor air quality products, everything from air purifiers to air cleaners, furnace filters, humidifiers and much, much more. We specialize in Aprilaire humidifier models and Lennox air filters. Browse our wide range of indoor air quality options and take advantage of our 100% satisfaction guarantee at great prices with fast shipping on every order. If you find Honeywell thermostats or anything else that you are looking for at a legitimately lower price on another site, email us and we will try our best to price match it. Plus if you are not completely thrilled with your purchase from DiscountFurnaceFilter.com, we will make sure that you get what you want.

Confused about which furnace filter is right for your home? Feel free to use our handy product comparison and selection tool that will outline your available options depending upon your needs. You can also contact us with all your indoor air quality questions and concerns on issues like whether whole house humidifiers or portable models will work better for you. Our family-owned business has over 50 years in the indoor air quality industry and we are happy to offer our expertise to both customers and contractors alike. Check out our resource center for a broad variety of information and facts about humidifier filters and other products that will help you to maintain good indoor air quality for your family. And do not forget to look up our installation guide for easy to follow step-by-step instructions for your order.

We are working hard to become your number one source for all the knowledge, information, and tools you need to improve the quality of the air inside your home. After all, we do not just feature top-of-the-line items like the Aprilaire 5000 air cleaners at great prices but also want to help you make an informed decision on your purchase, especially when it impacts your health, comfort, and quality of life. Our goal is to become a world leader in sales of indoor air quality products and for us that means treating everyone with respect, caring and honesty. That is why we have pledged to donate no less than 10% of our proceeds from Goodman air conditioners and everything else we sell to charitable organizations. It is just one way we can show how grateful we are for your business and for the support of the community.

We have tested and installed every product that we feature such as the Aprilaire 700 humidifier and stand behind their effectiveness. In addition, we offer expedited shipping and delivery, secure ordering and privacy, order tracking, multiple payment options, and testimonials that will assure you of our dedication to your indoor air quality experience. We believe that you should not have to spend outrageous amounts of money for furnace filters or even big-ticket items like Goodman furnaces when you work hard for yourself and your family. So shop and save with us at DiscountFurnaceFilter.com and let us deliver all your orders quickly and conveniently to your door. From our family to yours, we thank you for your business and appreciate your support!




We specialize in...

Aprilaire Humidifiers

Aprilaire 5000 Air Cleaners

Lennox Air Filters & Lennox Furnace Filters

If you are looking to improve the humidity in your home or office, an Aprilaire humidifier is the perfect solution. If you already have an Aprilaire humidifier and you just need replacement water panels, or humidifier pads, we have those as well. Because Aprilaire humidifiers are so easy to maintain, almost anyone can replace their own humidifier panel to keep your Aprilaire humidifier working well year after year. Check out our selection today.





The Aprilaire 5000 Electronic Air Cleaner is the Consumer Reports #1 rated whole-house electronic air cleaner for the third year in a row, making it one of the most popular air cleaners on the market. Easy to install, practically maintaincence-free, and extremely effective at cleaning the air in your home or office, the Aprilaire 5000 air cleaner is clearly the best value. Check out our selection today.




No other brand in heating and air conditioning says "quality" like Lennox, and Lennox Air Filters or Lennox Furnace Filters are no exception. Many people realize that choosing a furnace filter is an important decision. Lennox air filters and Lennox furnace filters are available in many sizes, thicknesses and MERV ratings for maximum effectiveness. The Lennox X6672 and Lennox X6675 MERV 16 filters and the Lennox X0445 and Lennox X0444 filters are our most popular Lennox filter options!