A thermostat is the control device used to set or change the temperature of a room or building. Thermostats help us to keep the temperature in our homes at a reasonable level. When a desired temperature is set, the thermostat detects the current temperature in the house and turns the air conditioner on to heat or cool the house to the temperature that was set. Once that temperature has been reached, the thermostat turns the air conditioner off.
Having a thermostat in your home can save you money by regulating the temperature accordingly. Investing in an automatic thermostat can save you even more by allowing you to set an automated heating or cooling regimen. Basically you set the desired temperatures for morning, noon and night and the thermostat does the rest!