A THERMOSTAT FOR CONTROLLING AN HVAC SYSTEM; A SYSTEM HAVING A PROGRAMMABLE THERMOSTAT AND HEATING AND AIR CONDITIONING EQUIPMENT FOR RESIDENTIAL AND COMMERCIAL BUILDINGS; A SYSTEM HAVING VENTILATION DUCTS, HEATERS, AIR CONDITIONERS AND A PROGRAMMABLE THERMOSTAT; A PROGRAMMABLE THERMOSTAT CONNECTED TO A CENTRAL AIR HEATING UNIT
Electrical and Scientific Apparatus