Lennox 31L98 Flue Transition THPU32HP7Y whereas the 100XL typically fits

whereas the 100XL typically fits 3/4 inch connections and supports significantly higher BTU ratings

this centrifugal blower ensures the pressure switch closes reliably to initiate the heating cycle

this unit features a 5/8" orifice providing a high flow coefficient (Cv) of 4

which utilizes a specialized blend of desiccants to tackle the three main enemies of any circuit: moisture

this blower fan housing directs discharge air with precision

Lennox 31L98 Flue Transition THPU32HP7Y whereas the 100XL typically fitsThe Lennox 31L98 Flue Transition is a critical OEM component designed to provide a secure, airtight connection between the furnace exhaust outlet and the multi stage venting system. Engineered for high efficiency gas furnaces and oil fired boilers, this HVAC vent pipe adapter prevents the escape of toxic combustion gases like carbon monoxide by ensuring a precision fit at the draft inducer or heat exchanger interface. As a genuine Lennox replacement