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The genuine OEM Lennox 10W07 burner manifold (factory part R100149-02) is the pipe assembly that distributes gas evenly to each burner and supports the gas orifices in your Lennox furnace. The manifold sets precise spacing and alignment between the gas valve and the individual burners, ensuring each burner receives the correct fuel flow for uniform, reliable ignition and combustion.
Signs of a failing manifold include uneven or delayed burner lighting, flame rollout, whistling or hissing from gas leaks, corroded or damaged orifice threads, and misaligned burners. Cracks, corrosion, or warping can disrupt gas delivery and create serious safety hazards.
OEM replacement is critical on gas-fired Lennox equipment. The 10W07 is manufactured to exact factory dimensions so the orifices, spacing, and mounting all align perfectly with your burner assembly and gas valve. This preserves proper fuel metering, safe ignition sequencing, and the efficiency your furnace was certified to deliver.