HVAC Learning Tool Gas-Fired Heater Unit Gas-Fired Heater Unit The gas-fired heater unit provides local heating to a space using recirculated air. Fan: The fan circulates air through the heat exchanger. Motor: The motor rotates the fan. Burner: The burner burns a fuel and air mixture to release heat. Heat Exchanger: The heat exchanger transfers heat from the burner to the airflow. Housing: The housing provides an enclosure for the system's components. Flow Vanes: Flow vanes control the direction of discharged air. Fan: The fan circulates air through the heat exchanger. Motor: The motor rotates the fan. Burner: The burner burns a fuel and air mixture to release heat. Heat Exchanger: The heat exchanger transfers heat from the burner to the airflow. Housing: The housing provides an enclosure for the system's components. Flow Vanes: Flow vanes control the direction of discharged air.