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We specialize in brand new, high-quality Lennox products! As a "brick and mortar" Lennox dealer for over 25 years, we sell top-quality Lennox air filters, Lennox humidifiers, Lennox thermostats, and other OEM Lennox products that we have installed and tested in the field. That means you can be confident that you won't make a mistake when you buy a Lennox filter or humidifier from DiscountFurnaceFilter.com.

A few of our most popular items are the Lennox X0445 and Lennox X0444 pleated media filters that fit the Lennox PMAC and Space-Gard media filter cabinets. We also carry Lennox X0586, Lennox X0581, Lennox X6670 and other popular Lennox boxed media filters. In addition, the Lennox X6672 and X6675 MERV 16 Lennox media filters are gaining popularity because of their extremely high filtration capabilities.

Whether you need a Lennox bypass humidifier or Lennox programmable thermostat to make your entire home more comfortable, or a Lennox furnace filter or PureAir filter, you came to the right place.

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Lennox Healthy Climate HEPA-60 HEPA By-pass Filtration Unit Our Price:		Lennox X8785 Healthy Climate PureAir Air Purification System PCO20-28 Our Price:

Lennox Healthy Climate HEPA-60 HEPA By-pass Filtration Unit. Best possible air-filtration performance. 500 CFM Model for up to 4000 square feet.		You will find replacement parts by clicking here! The Lennox X8785 PureAir� air purification system is the only single indoor air quality system that can safely remove and destroy chemical vapors and odors. It also captures small particles and microorganisms. Using patented light-purification technology and two types of filtration, the PureAir system cleans the air better than any other single system you can buy.


Lennox X8786 Healthy Climate PureAir Air Purification System PCO16-28 Our Price:		Lennox X8787 Healthy Climate PureAir Air Purification System PCO14-23 Our Price:

Lennox X8786 Healthy Climate PureAir Air Purification System PCO16-28		Lennox X8787 Healthy Climate PureAir Air Purification System PCO14-23


Lennox BMAC 16" x 25" x 3" Furnace Filter - X0581 Our Price: $26.00		Lennox BMAC 16" x 20" x 5" Furnace Filter - X0582 Our Price: $26.00

Lennox Healthy Climate MERV 10 replacement furnace filter. Filter dimensions: 16" x 25" x 3". X0581		Lennox BMAC (Boxed Media Air Cleaner) MERV 10 replacement furnace filter. 16" x 20" x 5". X0582


Lennox BMAC 16" x 25" x 5" Furnace Filter - X0583 Our Price: $26.00		Lennox BMAC 16" x 26" x 5" Furnace Filter - X0584 Our Price: $26.00

Lennox BMAC (Boxed Media Air Cleaner) MERV 10 replacement furnace filter. 16" x 25" x 5". X0583		Lennox BMAC (Boxed Media Air Cleaner) MERV 10 replacement furnace filter. 16" x 26" x 5". X0584


Lennox BMAC 20" x 20" x 5" Furnace Filter - X0585 Our Price: $26.00		Lennox BMAC 20" x 25" x 5" Furnace Filter - X0586 Our Price: $26.00

Lennox BMAC (Boxed Media Air Cleaner) MERV 10 replacement furnace filter. 20" x 20" x 5". X0585		Lennox BMAC (Boxed Media Air Cleaner) MERV 10 replacement furnace filter. 20" x 25" x 5". X0586


Lennox BMAC 20" x 26" x 5" Furnace Filter - X0587 Our Price: $26.00		Lennox PMAC-20C Replacement Filter 25" x 20" x 6"- X0445 Our Price: $26.00

Lennox BMAC (Boxed Media Air Cleaner) MERV 10 replacement furnace filter. 20" x 26" x 5". X0587		Lennox PMAC (Pleated Media Air Cleaner) MERV 10 replacement furnace filter 25" x 20" x 6"- X0445


Lennox PMAC-12C Replacement Filter 28" x 17" x 6"- X0444 Our Price: $26.00		Outdoor Temperature Sensor for Lennox Elite Thermostat Our Price: $26.95

Lennox PMAC (Pleated Media Air Cleaner) MERV 10 replacement furnace filter - X0444. Filter dimensions: 28" x 17" x 6".		Outdoor Temperature Sensor for Lennox Elite Thermostat.


Outdoor Temperature Sensor for Lennox Merit and Comfortsense Thermostats Our Price: $26.95		Lennox PureAir PCO-20C Replacement Filter 21" x 26" x 4" - X6667 Our Price: $26.99

Lennox X2658 Outdoor Temperature Sensor for Lennox Merit / Comfortsense Thermostat. Designed to work with the Lennox Merit & Comfortsense Thermostats.		Lennox PureAir PCO-20C MERV 10 replacement filter. Filter dimensions: 21" x 26" x 4".


Lennox PureAir PCO-12C Replacement Filter 17" x 26" x 4" - X6664 Our Price: $28.08		Lennox Healthy Climate 14" x 20" x 1" Furnace Filter (4-Pack) Our Price: $29.95

Lennox PureAir PCO-12C MERV 10 replacement filter. Filter dimensions: 17" x 26" 4".		Lennox Healthy Climate 14" x 20" x 1" replacement furnace filters (4-Pack). Merv 8 filtration in a 1-inch thick replacement filter.


Lennox Healthy Climate 15" x 20" x 1" Furnace Filter (4-Pack) Our Price: $29.95		Lennox Healthy Climate 16" x 20" x 1" Furnace Filter (4-Pack) Our Price: $29.95

Lennox Healthy Climate 15" x 20" x 1" replacement furnace filters (4-pack). Merv 8 filtration in a 1-inch thick replacement filter.		Lennox Healthy Climate 16" x 20" x 1" replacement furnace filters (4-pack). Merv 8 filtration in a 1-inch thick replacement filter.


Lennox Healthy Climate 20" x 20" x 1" Furnace Filter (4-Pack) Our Price: $29.95		Lennox Healthy Climate 14" x 25" x 1" Furnace Filter (4-Pack) Our Price: $29.95

Lennox Healthy Climate 20" x 20" x 1" replacement furnace filters (4-pack). Merv 8 filtration in a 1-inch thick replacement filter.		Lennox Healthy Climate 14" x 25" x 1" replacement furnace filters (4-pack). Merv 8 filtration in a 1-inch thick replacement filter.


Lennox Healthy Climate 16" x 25" x 1" Furnace Filter (4-Pack) Our Price: $29.95		Lennox Healthy Climate 18" x 25" x 1" Furnace Filter (4-Pack) Our Price: $29.95

Lennox Healthy Climate 16" x 25" x 1" replacement furnace filters (4-pack). Merv 8 filtration in a 1-inch thick replacement filter.		Lennox Healthy Climate 18" x 25" x 1" replacement furnace filters (4-pack). Merv 8 filtration in a 1-inch thick replacement filter.


Lennox Healthy Climate 20" x 25" x 1" Furnace Filter (4-Pack) Our Price: $29.95		Lennox Healthy Climate 25" x 25" x 1" Furnace Filter (4-Pack) Our Price: $29.95

Lennox Healthy Climate 20" x 25" x 1" replacement furnace filters (4-pack). Merv 8 filtration in a 1-inch thick replacement filter.		Lennox Healthy Climate 25" x 25" x 1" replacement furnace filters (4-pack). Merv 8 filtration in a 1-inch thick replacement filter.


Lennox MF1-20 20" x 25" x 5" Furnace Filter - X1152 Our Price: $29.95		Lennox PCO-20C MERV 10 Pleated Filter 20" x 26" x 3" - X5422 Our Price: $31.27

Lennox MF1-20 air cleaner. 20"x25"x5" fits the MF1-20 air cleaner.		Lennox PCO-20U MERV 10 replacement furnace filter 20" x 26" x 3"- X5422


Lennox X8794 - Healthy Climate PureAir UV Lamp PCO20-28/16-28/14-23 Our Price: $32.39		Lennox PureAir PCO-12C/20C UVA Lamp (Single) Our Price: $32.39

Lennox X8794 - Healthy Climate PureAir UV Lamp PCO20-28/16-28/14-23		Lennox PureAir PCO-12C/20C replacement UVA lamp (single)


Lennox Healthy Climate HEPA-20 Carbon Pre-Filter Our Price: $36.67		Lennox Healthy Climate HEPA-40/60 Carbon Pre-Filter Our Price: $36.67

Lennox Healthy Climate HEPA-20 Carbon Pre-Filter.		Lennox Healthy Climate HEPA-40/60 Carbon Pre-Filter.


Lennox HEPA-20 Replacement Charcoal Carbon Filter Our Price: $36.67		Lennox HEPA-40/60 Replacement Foam Pre-Filter Our Price: $37.75

Lennox HEPA-20 Replacement Charcoal Carbon Filter. Use for 3rd-stage filtration for removing odors. 180 CFM Model for up to 1500 square feet. Replace every 3-6 months.		Lennox HEPA-40/60 Replacement Foam Pre-Filter. 320 & 500 CFM Models for up to 4000 square feet. Replace every 10-12 months.


Lennox HEPA-40/60 Replacement Charcoal Carbon Filter Our Price: $43.15		Lennox ComfortSense 3000 Thermostat (1 Heat / 1 Cool) Our Price: $48.55

Lennox HEPA-40/60 Replacement Charcoal Carbon Filter. 320 & 500 CFM Models for up to 4000 square feet. Replace every 3-6 months.		Lennox ComfortSense 3000 Thermostat. 1 Stage of heating and 1 Stage of cooling control for standard systems! Precise temperature control at the touch of a button.


Lennox BMAC 20" x 26" x 5" Furnace Filter - X0587 - (2-Pack) Our Price: $52.00		(2-PACK) Lennox PMAC-20C Replacement Filters 25" x 20" x 6"- X0445 Our Price: $52.00

Convenient 2-Pack of Lennox BMAC (Boxed Media Air Cleaner) MERV 10 replacement furnace filters. 20" x 26" x 5". X0587		Convenient 2-PACK of Lennox PMAC (Pleated Media Air Cleaner) MERV 10 replacement furnace filters 25" x 20" x 6"- X0445


(2-PACK) Lennox PMAC-12C Replacement Filters - 28" x 17" x 6" - X0444 Our Price: $52.00		Lennox ComfortSense 3000 Heat Pump Thermostat (2 Heat / 1 Cool) Our Price: $53.99

Convenient 2-PACK of Lennox PMAC (Pleated Media Air Cleaner) MERV 10 replacement furnace filters - X0444. Filter dimensions: 28" x 17" x 6".		Lennox ComfortSense 3000 Heat Pump Thermostat. 2 Stages of heating and 1 Stage of cooling control for heat pump or dual-fuel systems! Precise temperature control at the touch of a button.


Lennox UV-500 Replacement UV Lamp - Part 64X36 Our Price: $59.35		Lennox HEPA-20 Optional Carbon Canister - 94X98 Our Price: $86.35

Lennox UV-500 Replacement UV Lamp - Part 64X36. Fits the Lennox Healthy Climate UV-500 germicidal light.		Lennox HEPA-20 Optional Carbon Canister - 94X98.


Lennox PureAir X8788 PCO20-28 MERV 16 Filter- 20" x 26" x 5" Our Price: $89.00		Lennox PureAir X8789 PCO16-28 MERV 16 Filter 16" x 26" x 5" Our Price: $94.95

Lennox PureAir X8788 PCO20-28 MERV 16 Filter. Filter dimensions: 20" x 26" x 5".		Lennox PureAir X8789 PCO16-28 MERV 16 Filter. Filter dimensions: 16" x 26" x 5".


Lennox PureAir PCO-12C MERV 16 Replacement Filter 17" x 26" x 4" - X6666 Our Price: $94.95		Lennox PMAC-12C MERV 16 Replacement Filter 28" x 17" x 6" - X5425 Our Price: $94.95

Lennox PureAir PCO-12C MERV 16 replacement filter. Filter dimensions: 17" x 26" x 4".		Lennox PMAC (Pleated Media Air Cleaner) MERV 16 replacement furnace filter - X5425. Filter dimensions: 28" x 17" x 6".


Lennox PureAir PCO-20C MERV 16 Replacement Filter 21" x 26" x 4" - X6669 Our Price: $94.95		Lennox PureAir X8790 PCO14-23 MERV 16 Filter 20" x 21"x 5" Our Price: $102.55

Lennox PureAir PCO-20C MERV 16 Replacement Filter. Filter dimensions: 21" x 26" x 4".		Lennox PureAir PCO14-23 MERV 16 Filter. Filter dimensions: 20" x 21" x 5".


Lennox PMAC-20C MERV 16 Replacement Filter 25" x 20" x 6"- X5424 Our Price: $102.55		Lennox Healthy Climate WB12 Humidifier Our Price: $118.79

Lennox PMAC (Pleated Media Air Cleaner) MERV 16 replacement furnace filter 25" x 20" x 6"- X5424		Lennox Healthy Climate WB12 Humidifier. Effective, whole-house humidity control. Equivalent to the Aprilaire 550 Humidifier.


Lennox PureAir PCO-12C UVA Lamp Kit (4-Pack) Our Price: $129.55		Lennox Healthy Climate WB17 Humidifier Our Price: $129.59

Lennox PureAir PCO-12C UVA Replacement Lamp Kit (4-Pack)		Lennox Healthy Climate WB17 Humidifier. Effective, whole-house humidity control. Equivalent in capacity to the Aprilaire 400 & 600 Humidifier.


Lennox HEPA-20 Replacement HEPA Filter Our Price: $132.46		Lennox Healthy Climate BMAC-12C Box Media Air Cleaner (No Longer Available) Our Price: $134.95

Lennox HEPA-20 Replacement HEPA Filter Media. Best possible air-filtration performance. 180 CFM Model for up to 1500 square feet. Replace every 2-5 years.		Lennox Healthy Climate BMAC-12C Box Media Air Cleaner. Multi-position MERV 8 performance to capture particles as small as 0.3 micron.


Lennox Healthy Climate BMAC-20C Box Media Air Cleaner (No Longer Available) Our Price: $145.75		Lennox X8796 - Healthy Climate PureAir Annual Maintenance Kit for PCO16-28 Our Price: $145.80

Lennox Healthy Climate BMAC-20C Box Media Air Cleaner. Multi-position MERV 8 performance to capture particles as small as 0.3 micron.		Lennox X8796 - Healthy Climate PureAir Annual Maintenance Kit for PCO16-28


Lennox X8795 Healthy Climate PureAir Annual Maintenance Kit for PCO20-28 Our Price: $145.80		Lennox X8793 - PureAir PCO14-23 Replacement Metal Mesh Insert Our Price: $145.80

Lennox X8795 Healthy Climate PureAir Annual Maintenance Kit for PCO20-28		Lennox X8793 - PureAir PCO14-23 Replacement Metal Mesh Insert


Lennox X8797 - Healthy Climate PureAir Annual Maintenance Kit for PCO14-23 Our Price: $145.80		Lennox X8792 - Healthy Climate PureAir Metal Mesh Insert for PCO16-28 Our Price: $145.80

Lennox X8797 - Healthy Climate PureAir Annual Maintenance Kit for PCO14-23		Lennox Healthy Climate PureAir Metal Mesh Insert for PCO16-28 - X8792


Lennox X8791 - Healthy Climate PureAir Metal Mesh Insert for PCO20-28 Our Price: $145.80		Lennox HEPA-40/60 Replacement Charcoal Carbon Canister Our Price: $151.15

Lennox Healthy Climate PureAir Metal Mesh Insert for PCO20-28 - X8791		Lennox HEPA-40/60 Replacement Charcoal Carbon Filter. Use for 3rd-stage filtration for removing odors. Replace every 3-6 months.


Lennox Healthy Climate PMAC-12C High Efficiency Media Air Cleaner Our Price: $172.75		Lennox PureAir PCO-20C Metal Insert Our Price: $175.27

Lennox Healthy Climate PMAC-12C High Efficiency Media Air Cleaner. Multi-position MERV 10 performance to capture particles as small as 1 micron.		Lennox PureAir PCO-20C Replacement Metal Insert


Lennox PureAir PCO-12C Metal Insert Our Price: $175.27		Lennox PureAir PCO-12C MERV 10 Annual Maintenance Kit with Insert 17" x 26" x 4"- X8349 Our Price: $176.74

Lennox PureAir PCO-12C Replacement Metal Insert		Lennox PureAir PCO-12C MERV 10 UPGRADE KIT WITH INSERT - X8349. Filter dimensions: 17" x 26" x 4".


Lennox Healthy Climate PMAC-20C High Efficiency Media Air Cleaner Our Price: $178.15		Lennox Healthy Climate WP18 Humidifier Our Price: $183.55

Lennox Healthy Climate PMAC-20C High Efficiency Media Air Cleaner. Multi-position MERV 10 performance to capture particles as small as 1 micron.		Lennox Healthy Climate WP18 Humidifier - power humidification for homes up to 4,200 square feet. Equivalent to the Aprilaire 700M humidifier.


Lennox Comfortsense 7000 L7742U Thermostat Our Price: $184.95		Lennox PureAir PCO-12C MERV 16 Upgrade Kit without Insert 17" x 26" x 4"- X8346 Our Price: $188.19

Lennox Comfortsense 7000 Y0349 has been changed to Y2081		Lennox PureAir PCO-12C MERV 16 UPGRADE KIT WITHOUT INSERT - X8346. Filter dimensions: 17" x 26" x 4".


Lennox PureAir PCO-20C UVA Lamp Kit (6-Pack) Our Price: $194.35		Lennox ComfortSense 5000 L5732U Thermostat Our Price: $199.75

Lennox PureAir PCO-20C UVA Replacement Lamp Kit (6-Pack)		LENNOX COMFORTSENSE 5000 L5732U


Lennox X8348 Healthy Climate PCO-20C MERV 10 MAINT KIT W/INSRT 21" x 26" x 4" Our Price: $211.84		Lennox HEPA-40/60 Replacement HEPA Filter Our Price: $232.15

Lennox X8348 Healthy Climate PCO-20C MERV 10 MAINT KIT W/INSRT. Filter dimensions: 21" x 26" x 4"		Lennox HEPA-40/60 Replacement HEPA Filter Media. Best possible air-filtration performance. Compatible with both 320 & 500 CFM Models for up to 4000 square feet. Replace every 2-5 years.


Lennox PureAir PCO-20C MERV 16 Upgrade Kit without Insert - 21" x 26" x 4" - X8344 Our Price: $243.27		Lennox PureAir PCO-12C MERV 16 Upgrade Kit with Insert 17" x 26" x 4"- X8347 Our Price: $296.95

Lennox PureAir PCO-20C MERV 16 UPGRADE KIT WITHOUT INSERT - X8344		Lennox PureAir PCO-12C MERV 16 UPGRADE KIT WITH INSERT - X8347. Filter dimensions: 17" x 26" x 4".


Lennox PureAir PCO-20C MERV 16 Upgrade Kit with Insert 21" x 26" x 4"- X8345 Our Price: $313.15		Lennox Healthy Climate HEPA-20 HEPA By-pass Filtration Unit Our Price: $460.55

Lennox PureAir PCO-20C MERV 16 UPGRADE KIT WITH INSERT 21" x 26" x 4"- X8345		Lennox Healthy Climate HEPA-20 HEPA By-pass Filtration Unit. Best possible air-filtration performance. 180 CFM Model for up to 1500 square feet.


Lennox Healthy Climate HEPA-40 HEPA By-pass Filtration Unit Our Price: $661.35		Lennox Healthy Climate HEPA-60 HEPA By-pass Filtration Unit Our Price: $957.95

Lennox Healthy Climate HEPA-40 HEPA By-pass Filtration Unit. Best possible air-filtration performance. 320 CFM Model for up to 2500 square feet.		Lennox Healthy Climate HEPA-60 HEPA By-pass Filtration Unit. Best possible air-filtration performance.

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