Capacity: 6Ltr/min, Heat exchanger: 1Kg, Pressure: Zero water pressure valve (0.01-0.8Mpa), Rated heat power: 12, Gross weight: 6.50Kg, Net weight: 5.50Kg, Automatic IC Ignition System, Flame Failure Safety Device, Suitable For Low Pressure, Over Water Temperature Safety Device, Pressure Release Valve & Drain Valve (2 in 1), Double Steel Pipes, Ultra low water-pressure start system, Flame out protection, Battery auto ignition, Two ignition pin, much safer, Ignition failure protection, Wind back protection, Overheating & dry burn protection, 80% Energy Saving.