Burner orifices for natural gas.
Stainless steel heat exchanger, burner, and drip pan.
120 volt control transformer with a single point electrical connection.
Redundant combination gas valve.
Intermittent spark pilot with timed safety lockout.
Electronic flame modulation.
High temperature limit switch.
Power vent with proving switch.
Airflow proving switch.
Motor starter.
Lifting points.