A line voltage thermostat smart is a type of thermostat that is designed to regulate the temperature of a room or space. It is powered by the line voltage of the home, and is typically used to control heating and cooling systems. This type of thermostat is considered to be a “smart” thermostat because it is able to learn the user’s preferences and adjust the temperature accordingly. It can also be programmed to turn on and off at certain times of the day, or even to adjust the temperature based on the weather outside. The line voltage thermostat smart is an efficient and convenient way to keep a home comfortable and energy efficient. It is also a great way to save money on energy bills, as it will only use the energy it needs to maintain the desired temperature.