ECM variable-speed fan motors from the supplier allow the original equipment designer to use features that go beyond typical permanent split-capacitor motors. The motor can be designed for constant torque, constant cu ft/min, or constant speed. System performance in heating, cooling, and refrigeration equipment can be improved by utilizing speed control under various operation conditions designed for constant airflow, lower noise levels, better humidity control, and improved air quality. The motors are UL-approved under the guidelines of UL 60730-1A and UL 1998.
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