Thermally controlled vent damper
Thermally powered VAV diffuser and control assembly
Thermally-activated closure device
Thermoelectric piezoelectric temperature control
Thermostat having modulated and non-modulated provisions
Thermostat responsive to inputs from external devices
Thermostat with mechanical user interface
Thermostat with offset drive
Thermostatic control apparatus for operation between the heating
Thermostatically actuated regulator for a 4-lead air conditionin
Universal two stage gas furnace ignition control apparatus...
Valve construction and system utilizing the same
Variable output multistage gas furnace
Vent control arrangement for combustion apparatus
Vent control arrangement for combustion apparatus
Vent control arrangement for combustion apparatus
Vent damper with emergency manual override
Viscosity regulating apparatus and method
Zone climate control
Zone sensor or thermostat with forced air