A programmable room thermostat adjusts heating and cooling distribution based on one or more pre-selected temperatures, also controls appliances such as entertainment systems and lights, and may be powered by replaceable batteries or household current. The room thermostat monitors the air temperature in the room, which is defined as a zone, and determines whether heating or cooling is needed. Programmable settings for the room thermostat accommodate 24-hour and seven-day cycles, and are capable of applying the user's preferences based on the time of day and the day of the week. When the room reaches the desired temperature, the room thermostat signals a central thermostat to close the damper. The settings of each room thermostat in the home or office may be controlled and adjusted via the user's smartphone or other mobile electronic device.