This relay is optimized for 50/60 Hz applications

preventing downstream pressure equalization

the 60L22 is the current factory-designated replacement for part numbers 18M2701

the orifice and valve seat are likely wire-drawn or fouled

Lennox 33M70 Inducer Assembly Freon This relay is optimized forThe Lennox 33M70 Inducer Assembly is a high performance OEM replacement part engineered for draft induction in specific gas fired heating systems. Operating at 208 230V and 60Hz, this combustion air blower kit features a 1 20 HP motor rated for 3000 RPM. The assembly utilizes a Fasco U21B motor (Model 702111231) with a sealed ball bearing design and counterclockwise rotation (shaft end) to ensure consistent airflow and optimal static pressure in