OEM Lennox Heat Exchanger Assembly — 32K49

The genuine OEM Lennox 32K49 heat exchanger assembly is the primary heat-transfer element inside your Lennox gas furnace. Combustion gases pass through its sealed internal passages as the blower circulates household air across the exterior — heat moves into your home's air while the exhaust byproducts stay safely contained and vented out the flue. It is built to the exact dimensions, tube configuration, and mounting points Lennox engineered for your furnace.

Common failure symptoms: telltale signs of a compromised exchanger include a flickering or distorted burner flame, rust flakes or soot in the burner box, a metallic or chemical smell during heating cycles, carbon monoxide detector activations, and repeated flame-rollout or limit-switch shutdowns. Any crack or perforation lets flue gases into the airstream, so a damaged unit should be replaced without delay.

Why OEM matters: the 32K49 is matched to your furnace's specific burner input, gas valve, and airflow profile. Installing the authentic Lennox assembly maintains factory-rated heat rise and combustion safety, protects your equipment warranty and safety listing, and ensures a precise, bolt-in fit that generic substitutes cannot reliably provide.