... liquid2) Temperature preservation is equipped with standard electric water heater setting,automatic temperature control exchanger, and increased ... > -35 degrees centigrade9) Water capacity: 150L, 200L, 250L, 300L, 500L 10) Pressure: 6 Bars11) Daily efficiency: >= 55%(>=42% in ... ,compressed rock woolHeat Pipe pure red copper TU1+water,transfer power>=150W,Working pressure,4Mpa,welding pressure ...