Pneumatic Thermostat Direct Acting and Reverse Acting 2 Pipe Heating and Cooling Dual Temperature Control Air Pressure 15 to 20 psi Air Connections 5/32 in Barb Max Air Pressure 25 psi Max Ambient Temp 135 Degrees F Mounting Style Horizontal Height 2 3/32 in Width 3 1/8 in Depth 1 3/4 in Temp Control Range 55 Degrees to 85 Degrees F Air Consumption 20 scim