In order to create higher efficiency HVAC units, manufacturers incorporate better, more efficient motors to improve electricity consumption within a system. Better motors also improve airflow over heat exchangers, condenser coils, and evaporator coils. The Electronically Commutated Motor (ECM, or EC motor) is a more efficient mode of power for the HVAC system. If your HVAC system contains an ECM motor and you think it’s malfunctioning, contact R & M Heating and Cooling. Our AC and heating technicians offer services including repairs and replacements of your HVAC system and ECM motor in Huntsville, AL. Call 256-763-7535.
What is an ECM Motor?
An ECM motor is also known as a variable speed motor. It can vary its RPM in response to the system’s changing conditions, which helps make it more efficient. Overall, it’s meant to maintain airflow or CFM. In your furnace, furnace blower motors are among the highest energy consumers, as are AC blowers in the air handling system. Thus, homeowners can improve their system’s efficiency by choosing an EC motor.
ECM motors are advancements in blower motor efficiency; they not only save energy, they can also improve system performance. Unlike standard motors, the EC motor can offer various speeds when necessary; it can adjust according to signals from a controller or programmed to go through several speeds during furnace cycles. This type of motor can offer 65 to 75 percent efficiency. Though it’s more expensive initially, it’s expected that the lower operating costs are worth the initial expense.
ECM Service and Replacement
ECMs also offer a longer life with fewer maintenance needs. They need less lubrication, and their gradual increase in max output and gentle stops mean less wear on components. They are also less likely to overheat than standard motors.
All these things mean that you’re getting one of the best motors when you invest in ECMs. Of course, that doesn’t mean they will never need maintenance, repairs, or replacements. Like any other HVAC component, they need proper use and care through their lives. At some point, they may need repair, and, eventually, your ECM will need to be replaced.