OEM Lennox Burner — 77W22

The Lennox 77W22 Burner is a genuine OEM component that mixes gas and air and delivers a controlled flame into the heat exchanger of compatible Lennox furnaces. Its port geometry is engineered to produce stable, evenly distributed combustion so heat transfers efficiently and the flame stays in the correct pattern. A properly functioning burner is fundamental to safe ignition, quiet operation, and rated heating output.

Over time a burner can corrode, rust, or accumulate scale and debris that block ports. Symptoms of a failing burner include delayed or noisy ignition, yellow or lazy flames, flame rollout, soot buildup, uneven heating, or the furnace short-cycling on the flame sensor or limit switch. These issues reduce efficiency and can compromise safe combustion.

The OEM 77W22 is dimensioned to match Lennox burner spacing, orifice alignment, and manifold pressure, ensuring the flame lands exactly where the heat exchanger was designed to receive it. Generic burners often differ in port pattern and can disturb combustion balance. Match the part number to your unit's parts list before installing to preserve efficiency, safety, and warranty compliance.