Should I consider getting a variable-speed motor to run the fan of my new furnace?
Yes. Although the cost of a direct-current, variable-speed motor is higher, the electricity consumption will be at least 30% less than with a conventional motor.
A variable-speed motor is a high-efficiency motor due to the precise electronic controls allowing it to operate efficiently at any speed. A standard AC motor’s efficiency, on the other hand, drops off dramatically at lower speeds. Lower speed operation of the variable speed motor thus delivers savings, runs quieter, and provides more even temperature control throughout the home adding to occupant comfort.