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and Payne equipment to maintain factory airflow specifications
featuring a calibrated 190°F open temperature to interrupt the burner circuit during over-temperature conditions and a 160°F close temperature for system re-engagement
Factory-installed fan prover switch ensures appliance shutdown if venting fails
these are the same physical part
Lennox 73M72 Extension Kit Refrigerant and Payne equipment to maintainThe Lennox 73M72 is a critical Vertical Vent Extension Kit specifically engineered to modify the venting system on compatible high efficiency furnaces and SG 150 units. When standard flue runs aren't enough to clear building obstructions or meet local code for roof terminations, this OEM replacement part provides the necessary height for proper exhaust gas routing. For a tech in the field, this kit is essential for maintaining the correct 1 4 inch per