Lennox Furnace Filters

lennox furnace filters

Lennox is one of the most well known furnace filter brands in the world. The company was started by Dave Lennox in 1895 and has been a staple in the HVAC industry ever since. PureFilters carries a wide range of Lennox furnace filters, humidifier pads, maintenance kits and flame sensors.

PureFilters carries a wide variety of Lennox furnace air filters. All of our Lennox filters are genuine and sourced directly from the manufacturer. The Lennox furnace filters we carry are the pleated kind, providing a superior level of indoor air quality.

Below, you can see a list of all Lennox furnace filter models we carry, organized by NOMINAL size:

16x20x5 Lennox Furnace Filters

Lennox X0582 - BMAC Furnace Filter 16x20x5 MERV 11


16x25x3 Lennox Furnace Filters

Lennox X0581 - BMAC Furnace Filter 16x25x3 MERV 11


16x25x5 Lennox Furnace Filters

Lennox X6670 - Healthy Climate HCF16-11 Replacement Filter 16x25x5 MERV 11 (OEM)

Lennox X6672 - Carbon Clean Healthy Climate HCF16-16 Replacement Filter 16x25x5 MERV 16

Lennox X0583 - BMAC Furnace Filter 16x25x5 MERV 11

Lennox X8309 - Furnace Filter 16x25x5 MERV 10

Lennox X8312- Furnace Filter 16x25x5 MERV 16


16x26x3 Lennox Furnace Filters

Lennox X5423 - Furnace Filter 16x26x3 MERV 11


16x26x5 Lennox Furnace Filters

Lennox X8789 – PureAir PCO16-28 Filter 16x26x5 MERV 16

Lennox Y6605 - size 16x26x5 MERV 16 pleated media filter

Lennox X0584 - BMAC Furnace Filter 16x26x5 MERV 11


17x26x5 Lennox Furnace Filters

Lennox X6664 - PureAir PCO-12C Replacement Filter 17x26x4 MERV 11

Lennox X6666 - PureAir PCO-12C Replacement Filter 17x26x4 MERV 16


20x20x5 Lennox Furnace Filters

Lennox X0585 - Healthy Climate Cabinet Furnace Filter 20x20x5 MERV 11 (OEM)

Lennox X8311- Furnace Filter 20x20x5 MERV 10


20x21x5 Lennox Furnace Filters

Lennox X8790 – PureAir PCO14-23 Filter 20x21x5 MERV 16

Lennox Y6606 - Size 20x21x5 MERV 16 Pleated Media Filter


20x25x5 Lennox Furnace Filters

Lennox X6673 - Healthy Climate HCF20-11 Replacement Filter 20x25x5 MERV 11 (OEM)

Lennox X6675 - Healthy Climate Carbon Clean HCF20-16 Replacement Filter 20x25x5 MERV 16

Lennox X0586 - BMAC Furnace Filter 20x25x5 MERV 11

Lennox X7935 - Healthy Climate HCF14-16 Replacement Filter 20x20x5 MERV 16

Lennox X1152 - MF1-20 Furnace Filter 20x25x5 MERV 11

Lennox X8313 - Furnace Filter 20x25x5 MERV 16

Lennox X8310 - Furnace Filter 20x25x5 MERV 10


20x26x5 Lennox Furnace Filters

Lennox X8788 – PureAir PCO20-28 Filter- 20x26x5 MERV 16

Lennox Y6604 - size 20x26x5 MERV 16 pleated media filter

Lennox X0587 - BMAC Furnace Filter 20x26x5 MERV 11


21x26x5 Lennox Furnace Filters

Lennox X6667 – PureAir PCO-20C Replacement Filter 21x26x4 MERV 11

Lennox X6669- Furnace Filter 21x26x4 MERV 16 pleated media filter


25x20x5 Lennox Furnace Filters

Lennox X5424 - PMAC-20C Replacement Filter 25x20x6 MERV 16


28x17x6 Lennox Furnace Filters

Lennox X0444 - PMAC-12C Replacement Filter 28x17x6 MERV 11

Lennox X5425 - PMAC-12C Replacement Filter 28x17x6 MERV 16


Misc Lennox Filters

Lennox Y6621 PCO metal mesh insert

Lennox Y6607 PCO metal mesh insert

Lennox 75X66 - size 21x26x1 PCO metal mesh insert

Lennox X2678 Replacement Carbon Inner-Filter

Lennox X4137 Replacement Carbon Pre-Filter

Lennox 92X17 HEPA 20 Filter Replacement

Lennox X4138 Replacement Carbon Pre-Filter

Lennox 92X09 Replacement Carbon Inner-Filter

Lennox 75X73 - size 17x26x1 PCO metal mesh insert


Lennox Furnace Filter MERV Ratings

Lennox manufactures filters in a few different MERV ratings. If you are unsure of which MERV rating is suitable for your home, be sure to check out our MERV Rating Guide. You can also see a quick comparison chart here:

How Often To Change Lennox Filters

The frequency of Lennox filter changes will highly depend on what is inside your home, where you are located and various other factors. We wrote a Filter Change Frequency Guide which will help you decide when it is time to change your furnace filter.


Lennox Furnace Filter Sizes

It's important to know the difference between nominal size and actual or exact size. We wrote a Guide for Furnace Filter Sizes, if you are not sure what the size of your Lennox filter is, we recommend checking it out.

Please see the image below on how to measure your Lennox filter accurately:


Request Custom Size Lennox Furnace Filter

If you still cannot find your furnace filter listed on our store, you can always request a custom size filter. Custom size filters can take up to 15 business days to deliver and all custom size filter sales are final (no refunds/exchanges). In order to request a custom size filter and receive a quote for your order, please click on the link below.

Request custom size filter

If you need help finding your exact filter on PureFilters.ca and prefer to speak to someone, please give us a call at 1-888-979-4284 or email us at support@purefilters.ca. We are available Monday to Friday from 9AM to 5PM Eastern Standard Time.