Most homes use a single furnace to heat the whole house, but since every room is heated at once to maintain the same temperature, unoccupied rooms are often heated unnecessarily, wasting valuable heat and energy. Save money and energy simply by closing the vents of these frequently empty rooms during certain hours to heat only the rooms you use most often. Instead of paying hundreds of dollars for a complicated zone-based thermostat system, the Programmable InteliVent will do this for you automatically. The Programmable InteliVent installs easily in any floor vent opening and uses a programmable interface to open and close the vent based on when you want the room heated. The Programmable InteliVent is powered by four AA batteries (sold separately), which should last up to two years. This easy-to-use programmable interface provides maximum airflow control in individual rooms, resulting in comfortable, predictable room temperatures as well as energy savings. Designed for ease of use and simple control, the InteliVent 1000 comes standard with a simple user interface that allows you to program the unit with a few simple steps: Just set the local time and the desired time for vent opening and closing, and your energy savings will begin. The Programmable InteliVent is also available in brown.