Features: Features Automatic Pulse Ignition Control System Simple System Of Temperature Control By Regulating The Water Flow. Powder Coated Outer Body, Copper Heat Exchanger And Stainless Steel Burners. Designed To Work Even At Very Low Water Pressure (<3 Ft Water Head) Safety Features Automatic Gas Regulation: The Gas Valve Is Turned On And Off Automatically With The Flow Of Water. Gas Flow And Flame Are Switched On/Off Only When The Tap Is Opened/Closed. No Pilot Flame. Advanced Electronic Pulse Ignition Prevents Wastage Of Gas. Ic Sensor To Shutdown Gas Flow In Case Of Flame Failure. 20 Minute Timer Shuts Off Gas If Unit Is Left On Accidentally. Safety Features Automatic Gas Regulation: The Gas Valve Is Turned On And Off Automatically With The Flow Of Water. Gas Flow And Flame Are Switched On/Off Only When The Tap Is Opened/Closed. No Pilot Flame. Advanced Electronic Pulse Ignition Prevents Wastage Of Gas. Ic Sensor To Shutdown Gas Flow In Case Of Flame Failure. 20 Minute Timer Shuts Off Gas If Unit Is Left On Accidentally.