1. Get Hot Water in Seconds; 2. Over Water Pressure Protection; 3. Different panels and valves 4. 6L-12L is available Features:1.Three ignition pin, pulse ignition device2.Constant temperature type with digital display3.Flame failure safety device, water-gas interlock valve device4.Over-temperature protection, antifrost protection5.Safety devices for accidental falme out, low water pressure ...