OEM Lennox Heat Exchanger Assembly — 28W28

The genuine OEM Lennox 28W28 heat exchanger assembly is the core heating component of compatible Lennox gas furnaces. As the burners fire, this assembly absorbs combustion heat and transfers it to the air stream passing over its surface, all while keeping toxic flue gases sealed away from your conditioned air. It is engineered to the precise dimensions, alloy, and tube configuration of your Lennox model for correct airflow and rated output.

Common failure symptoms: Watch for a cracked or corroded exchanger signaled by rust and soot buildup, a distorted or flickering burner flame, popping or booming sounds on ignition, reduced heat output, and short cycling. Any evidence of a crack is a safety issue because it can leak carbon monoxide into the home — if your CO detector alarms, shut the system down and service it right away.

Why OEM matters for Lennox: A heat exchanger must match your furnace's exact combustion design to maintain proper burner performance and the sealed barrier that keeps flue gas out of your breathing air. The factory 28W28 part ensures an exact fit, preserves Lennox efficiency ratings, and keeps the system code-compliant and warranty-safe. Generic replacements can misfit and create dangerous combustion conditions. Install genuine OEM for reliable, safe heating season after season.