Lennox 18H61 Motor

The Lennox 18H61 is a high-performance direct drive blower motor engineered for reliability in residential and light commercial air handlers and furnaces. As a veteran-grade OEM replacement motor, this 48Y frame unit is a Permanent Split Capacitor (PSC) design, operating at 208/230V and delivering a consistent 1/3 HP at 1075 RPM. This 4-speed motor allows for precise airflow calibration, ensuring optimal system static pressure and energy efficiency. It features a durable sleeve bearing system for quiet, long-term operation even in high-demand cycles. The 1/2-inch by 3-inch shaft and torsion flex bracket mounting (including three factory-welded arms) provide a secure, vibration-resistant fit for compatible Lennox, Armstrong, and Ducane equipment. This 115/208-230V HVAC motor is thermally protected and designed to replace legacy parts including 18K74 and 18J9401, maintaining factory-spec performance. HVAC contractors should verify the required 5 MFD / 370V capacitor during installation to ensure proper torque and motor longevity.

• Multi-Speed Versatility: The 4-speed tap configuration allows technicians to fine-tune CFM delivery for heating and cooling stages.
• OEM Compatibility: Exact fit for Lennox CB28UH, CB29M, and CHA16 series, eliminating the need for field modifications.
• Quiet Operation: Internal sleeve bearings and an open-air-over enclosure design reduce decibel levels and heat buildup.
• Industrial Build: Engineered with a 48 frame diameter and thermally protected windings to handle heavy-duty blower cycles.

• What capacitor is required for the Lennox 18H61? This motor requires a 5 MFD at 370 VAC run capacitor for correct phase shift and operation.
• Is this motor reversible? The 18H61 features CCWLE (Counter-Clockwise Lead End) rotation, which is the standard for most Lennox blower assemblies.
• Can this replace the 18K74 motor? Yes, the 18H61 is a factory-authorized replacement for part numbers 18K74, 18J94, and 18H6101.

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.