Which device is primarily used to control temperature in a building or zone?

Which device is primarily used to control temperature in a building or zone?

• A. Thermostat
• B. Humidifier
• C. Hygrometer
• D. Airflow station

Answer: (A)

Controlling the temperature in a building or zone comes from a device that continuously reads the room temperature and compares it to a user-setpoint, then energizes or de-energizes the heating or cooling equipment to reach and hold that setpoint. This is the thermostat. It acts as the control point that turns on furnaces, boilers, or air conditioners, and in zoned systems it can manage dampers or valves to regulate heat in a specific area. Humidifiers are for adding moisture and do not set temperature; a hygrometer merely measures humidity; an airflow station handles the movement and balance of air rather than temperature. Therefore, the thermostat is the device that primarily governs temperature in a building or zone.

Controlling the temperature in a building or zone comes from a device that continuously reads the room temperature and compares it to a user-setpoint, then energizes or de-energizes the heating or cooling equipment to reach and hold that setpoint. This is the thermostat. It acts as the control point that turns on furnaces, boilers, or air conditioners, and in zoned systems it can manage dampers or valves to regulate heat in a specific area. Humidifiers are for adding moisture and do not set temperature; a hygrometer merely measures humidity; an airflow station handles the movement and balance of air rather than temperature. Therefore, the thermostat is the device that primarily governs temperature in a building or zone.