Lennox 31L98 Flue Transition 321702-401 and H-1799B series

and H-1799B series

This typically signals a furnace igniter failure or incorrect voltage

Its rugged construction and CSA listing guarantee reliability in demanding environments

The high-capacity 50-micron polypropylene fleece matting effectively traps dust and debris in natural gas

Key Benefits Broad Capacity Range: Handles demanding loads from 30

Lennox 31L98 Flue Transition 321702-401 and H-1799B seriesThe 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