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Leading the Industry in Energy Efficiency
Brand history, product range & what we stock
Lennox International has been engineering HVAC equipment since 1895, making it one of the oldest and most trusted names in the heating and cooling industry. Based in Richardson, Texas, Lennox consistently leads the industry in efficiency ratings — producing some of the highest-SEER air conditioners and highest-AFUE furnaces available. The company's product lineup spans residential systems (Signature Collection, Elite Series, Merit Series) and commercial equipment for light commercial applications.
National HVAC Parts stocks 17,000+ genuine Lennox OEM replacement parts for residential and light-commercial equipment. Our inventory covers the full Lennox Signature Collection, Elite Series, and Merit Series, along with Armstrong Air, AirEase, Ducane, and other Lennox OEM brands sharing the same parts lineage. All Lennox parts ship from authorized supply channels with full OEM warranty compliance.
Browse 17,000+ OEM Lennox components organized by part type
Protect your equipment investment with factory-specification components
OEM parts available for all Lennox system types
Common questions about Lennox OEM replacement parts
We cover the full Lennox residential lineup including Signature Collection (XC/XP/SLP/SLO series), Elite Series (EL/HS series), and Merit Series (ML/MS series). We also stock parts for Armstrong Air, AirEase, Ducane, and Concord brand equipment, which share Lennox OEM part numbers.
SureLight® is Lennox's proprietary integrated hot-surface ignition and flame sensing control system used across many Lennox and affiliated-brand furnaces. We stock SureLight ignition modules, igniter elements, and flame sensors for all SureLight variants. Search by your furnace model number to find the correct SureLight component.
Yes, in most cases. Armstrong Air, AirEase, Ducane, and Concord are all manufactured under Lennox OEM, sharing production platforms and part numbers. When cross-referencing, enter your model number in our search and we will display compatible OEM part numbers across all affiliated brands.
Lennox iComfort® communicating thermostat components including the thermostat itself, remote indoor sensors, iHarmony® zoning panels, and iComfort-compatible control boards are all available in our controls category. Search by your iComfort model number or thermostat part number.
17,000+ genuine OEM components in stock. Same-day dispatch on all stocked parts.