A line volt thermostat is a device used to control the temperature of a room or area. It is typically installed in a wall or ceiling and is connected to a heating or cooling system. The thermostat works by sensing the temperature of the air and then sending a signal to the heating or cooling system to adjust the temperature accordingly. The thermostat can be set to a specific temperature or to a range of temperatures. It can also be programmed to turn the system on and off at certain times of the day. Line volt thermostats are often used in commercial buildings, such as offices, factories, and warehouses, as well as in residential homes. They are also used in greenhouses and other areas where temperature control is important. The line volt thermostat is an important tool for keeping a comfortable temperature in any environment.