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I am writing a measure to replace the standard motor in a fan coil unit with an electronically commutated motor (ECM) and am looking for suggestions on the best way to model this. The standard motor is of type openstudio::model::FanOnOff in an openstudio::model::ZoneHVACFourPipeFanCoil object. My first thought was to change the fan to openstudio::model::FanVariableVolume and increase the motor efficiency, but I'm not sure this is the best way to model it. Alternatively, I considered just increasing the motor efficiency of the openstudio::model::FanOnOff object. What is the best way to model an ECM?

I am writing a measure to replace the standard motor in a fan coil unit with an electronically commutated motor (ECM) and am looking for suggestions on the best way to model this. The standard motor is of type openstudio::model::FanOnOff in an openstudio::model::ZoneHVACFourPipeFanCoil object. My first thought was to change the fan to openstudio::model::FanVariableVolume and increase the motor efficiency, but I'm not sure this is the best way to model it. Alternatively, I considered just increasing the motor efficiency of the openstudio::model::FanOnOff object. What is the best way to model an ECM?

I am writing a measure to replace the standard motor in a fan coil unit with an electronically commutated motor (ECM) and am looking for suggestions on the best way to model this. The standard motor is of type openstudio::model::FanOnOff in an openstudio::model::ZoneHVACFourPipeFanCoil object. My first thought was to change the fan to openstudio::model::FanVariableVolume and increase the motor efficiency, but I'm not sure this is the best way to model it. Alternatively, I considered just increasing the motor efficiency of the openstudio::model::FanOnOff object. What is the best way to model an ECM?