Pneumatic Thermostat Direct Acting 2 Pipe Heating Dual Temperature Air Connections 1/8 in Element Type Bi-Metal Max Air Pressure 25 psi Max Ambient Temp 100 Degrees F Mounting Style Vertical Height 3 1/4 in Width 2 in Depth 1 5/8 in Temp Control Range Day 59 Degrees to 90 Degrees F Night 50 Degrees to 80 Degrees F Air Consumption 19 scim Throttling Range 2 Degrees to 10 Degrees F