Furnace Blower Motor Fits Lennox Armstrong Ducane 45H69 45H6901 45H31 45H3101. This is a Brand New ClimaTek 4-Speed Furnace Blower Motor. It is 1/3 HP, 115 Volt, 1075 RPM, reversible rotation and has three mounting ears welded to the body. The shaft is 1/2″ by 6″ long. It is designed to replace the part numbers listed below. An electric motor converts electrical energy into mechanical energy. In an HVAC system, motors typically turn the air conditioning fan blade and the furnace blower motor. Newer high efficient motors, such as X13 and ECM motors, have “end caps” that control the motor speeds. These can be removed and replaced separately. Replaces Old Part #s. 45H69 45H6901 45H31 45H3101. Partial List of Units that Use This Item. Hit Ctrl + F and enter your model number for a quick search!