Messana Controls offers Demand-Controlled Ventilation (DCV) to operate ERV and HRV systems equipped with 0-10V fan speed regulation, through a feature called “Air Quality Adaptive Fan Speed Control”.
The speed of the ERV/HRV unit adjusts according to the detected eCO2 levels, which is a measure of indoor air quality. When eCO2 levels fall below the Low eCO2 setpoint, the unit operates at a Low speed. Conversely, when eCO2 levels exceed the High eCO2 setpoint, the unit operates at a High speed. For intermediate eCO2 levels, the unit linearly modulates the speed between the Low and High speeds.