Air Pressure Switch, Application Duct Heater Control, Humidity Detection and Control, Air Flow Control, Contact Form SPDT, Electrical Connection Type Screw Terminals, Electrical Rating 125 VA Pilot Duty @ 24V AC, 360 VA Pilot Duty @ 120 to 277V AC, Housing Type Conduit Box, Includes Mounting Bracket, Maximum Differential Pressure Setting 0.025 in wc, Maximum Operating Temperature 167 Degrees F, Maximum Pressure Rating 1 psig, Maximum Pressure Setting 1.4 in wc