VAV Thermostat Maximum Control Temperature 175 Degrees F Minimum Control Temperature 55 Degrees F Output Signal 135 ohm Potentiometer Number of Relay Outputs 1 Input Voltage 24V AC Maximum Operating Temperature 200 Degrees F Capillary Tube Length 5 ft Mounting Orientation Horizontal/Vertical Overall Width 2 in Overall Depth 2 1/4 in Application Air Temperature Modulation Water Temperature Modulation Housing Material Finish Enamel Housing Color Gray Series T991A