Reverse Acting/Direct Acting, Summer/Winter Thermostat, w/o
Reverse Acting/Direct Acting, Summer/Winter Thermostat, w/o Dial Limit Stops, for use with Honeywell 13 to 18# systems. These pneumatic room thermostats are designed for proportional temperature control of pneumatic valves and damper actuators to maintain room air temperatures in heating, ventilating, and air conditioning systems.