Fan Coil Thermostat, Control Line Voltage Valves of a Fan Coil Unit in Cooling, Manual or Automatic Changeover Heating and Cooling Systems, 120-277Vac, 4 Pipe Fan Coil, Automatic Heat-Cool Changeover, 55-95 Degree Temperature Setting Range, Marked Cool-Warm, Differential from Make of One Contact to Make of the Opposite Contact is 7 Degrees Maximum with a Positive Deadspot, On-Off System Switch Position,Hi-Med-Lo Fan Switch Position, Automatic Changeover, Premier White in Color, Mounting on 4" Square Outlex Box or 2 Ganged Outlet Box, 5-95% RH Non Condensing Operating Humidity Range