Lennox 27M78 Flue Gasket Kit Efficient Maintenance: Facilitates rapid valve

Efficient Maintenance: Facilitates rapid valve rebuilding using standard tools

or low gas pressure forcing flames out of the combustion area

designed to break the 24V control circuit if the heat exchanger plenum exceeds the calibrated 250°F threshold

providing a rigid furnace motor bracket interface that resists metal fatigue over time

Lennox 27M78 Flue Gasket Kit Efficient Maintenance: Facilitates rapid valveThe Lennox 27M78 Flue Gasket Kit is a critical OEM component designed to maintain an airtight seal between the flue pipe and the heating appliance. Also identified as Lennox 27M7801, this high temperature resistant gasket kit is engineered to withstand the thermal stress and corrosive secondary heat exchanger environments typical of Lennox G40DF, G50DF, and G60DF series units. Proper sealing of the flue system is essential for preventing dangerous