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