Hartzell Engine Technologies LLC (HET) owns, manufactures, and supports the Janitrol Aero line of aircraft cabin heating systems. As the manufacturer of the Janitrol product line, Hartzell supplies the OEM heating system for the Boeing CH-47 Chinook helicopter. The system consists of: S-200 model combustion heater assembly, fuel control assembly, ignition assembly, temperature switch, and air pressure switch. HET fully supports the Janitrol line with replacement units, overhauls, and spare parts. For more information visit www.Hartzell.aero or call (334) 386-5400.