OEM Lennox Heat Exchanger Assembly — 28W29

The genuine OEM Lennox 28W29 heat exchanger assembly is the heart of your gas furnace's heating cycle, transferring combustion heat into the air moving through your ductwork while keeping flue gases safely isolated from the air you breathe. Manufactured to Lennox's exact specifications, this assembly delivers the precise fit, sealing, and heat-transfer performance your furnace was designed to provide.

Signs of a failing heat exchanger include visible cracks or corrosion, a flame that flickers or shifts when the blower engages, soot accumulation, a strong chemical or burning odor, and repeated shutdowns on the furnace's safety limit switch. Any of these symptoms warrants immediate attention, since a cracked heat exchanger poses a carbon monoxide risk.

Installing an OEM Lennox 28W29 is essential for both safety and performance. Genuine Lennox construction ensures the correct steel gauge, weld integrity, and mounting geometry — factors that generic replacements often can't match. Using the authentic part protects your furnace's efficiency rating, maintains warranty compliance, and restores dependable, safe operation for years to come.