Siemens 192-208 ROOM TEMP THERMOSTAT, PNEUMATIC, DA HEAT, RA COOL, FAHRENHEIT, 2-PIPESiemens 192 208 This 192 Powerstar Heating Cooling Pneumatic Room Thermostat is direct acting heat @ 25 psi, reverse acting cooling @ 18 psi, and provides proportional dual setpoint, single output, two pipe high air capacity room temperature control. Fahrenheit scale. Wall plate and mounting screws included. Additional Information Dimensions (W x H x D)1. 57 x 3. 35 x 2. 17 in DisplayDual Setpoint