USF Motors and Controls10
Constant Pressure: The Constant Pressure control is designed to maintain
a constant level of static pressure by automatically adjusting the speed of a fan.
The Constant Pressure control is available with duct or room mounted probes for
static pressure control.
To get additional information on the Vari-Green Constant Pressure control, see
the Constant Pressure/Air Flow Control IOM, Document 479653.
Constant Airflow: the Constant Airflow control is designed to maintain
a constant level of airflow by automatically adjusting the speed of a fan. The
Constant Airflow control is available with a pitot tube for maintaining airflow.
To get additional information on the Vari-Green Constant Airflow control, see the
Constant Pressure/Air Flow Control IOM, Document 479653.
IAQ-Temp/Humidity: The Temperature and Humidity controller is designed to sense
the temperature and humidity in the space and will adjust the speed of the fan to maintain the
set point accordingly.
To get additional information on the Vari-Green Temperature and Humidity control, see the
Indoor Air Quality-Temp/Humidity Control IOM, Document 484777.
IAQ-VOC: The Volatile Organic Compounds controller is specifically designed to sense the
level of volatile organic compounds (VOCs) in the space and automatically adjusts the speed
of the fan to maintain the set point accordingly.
To get additional information on the Vari-Green Volatile Organic Compounds Control, see the
Indoor Air Quality-VOC Control IOM, Document 458146.
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