Lennox 33M70 Inducer Assembly

The 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 Lennox GCS16 and GCS20 series furnaces. Also listed under part number 33M7001, this unit replaces legacy components including 25M55, 25M5501, and LB-101225A. Designed for direct fitment, it includes the necessary transition gasket and sheet metal screws, allowing technicians to restore precise combustion regulated for safety and efficiency in residential and light commercial HVAC applications.

• Precise OEM Fitment: Cross-referenced as 33M7001 and LB-101225A for exact replacement in Lennox and Allied Air brand units.
• Industrial Build Quality: Equipped with a Fasco 0.83 Amp motor and double-shielded ball bearings for high-heat durability.
• Optimized Combustion: Delivers a steady 3000 RPM output to maintain regulated airflow and secure ignition sequences.
• Complete Installation Kit: Includes the induced draft blower, LB-61781D transition gasket, and mounting hardware for immediate field service.

• Is the 33M70 compatible with 33M7001? Yes, the Lennox 33M70 and 33M7001 are functionally identical and interchangeable OEM assemblies.
• What units does this inducer motor fit? This assembly is specifically designed for Lennox GCS16 and GCS20RV model series, as well as selected models from Armstrong, Ducane, and Concord.
• Does this kit include the gasket? Yes, verified kits include the LB-61781D gasket which is required for a proper airtight seal during the swap.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.