A HVAC T Stat, or thermostat, is a device that is used to regulate the temperature of a space. It works by sensing the temperature of the air in the room and then adjusting the heating or cooling system accordingly. The thermostat is usually connected to a heating or cooling system, such as a furnace, air conditioner, or heat pump. It is programmed to maintain a certain temperature range, which is usually determined by the user. The thermostat can be set to turn the heating or cooling system on or off at certain times, or it can be set to maintain a certain temperature all the time. The thermostat can also be used to regulate the humidity in the room, as well as the air circulation. The thermostat is an important part of any home’s heating and cooling system, as it helps to ensure that the temperature in the home is comfortable and consistent.