Features: 1) Stainless steel outer body 2) Oxygen depletion safety device 3) LCD temperature display available 4) Low battery indication, ignition indication 5) Water pressure and water temperature protection 6) 20-minute timer 7) Flue pipe natural exhaust 8) Summer/winter setting 9) Cold/hot water shift control 10) Water drainage for antifreeze 11) Safety device for accidental flameout 12) Continuous control of gas and water