Lennox 31W19 Flue Transition 318423-701 the 20-250 series valves can

the 20-250 series valves can accommodate different glass lengths

Always verify your specific Lochinvar technical manual for approved venting material transitions to ensure compliance

ideal for signaling alarms or interlocks

Can I use this for a hot surface ignition (HSI) system

Lennox 31W19 Flue Transition 318423-701 the 20-250 series valves canThe Lennox 31W19 Flue Transition is a critical induced draft component engineered for high performance Lennox packaged HVAC systems. As an essential OEM replacement part, this flue exhaust transition manages the path of combustion gases from the heat exchanger to the external vent, preventing backdraft and ensuring safe equipment operation. Fabricated to strict factory tolerances, the 31W19 eliminates the alignment issues ????? associated with