... pipes, The water is heated by the heat pipe rapidly.3) There is no water in the vacuum tube,so the ... use 2) Suitable for open or closed Loop (glycol-water) 3) Space heating4) Caravan Parks, Hotels, Schools, Public Showers/Kitchens , Restaurants ... .990/180/200JHC-5818-303.85 m2301960×2375×13094.367/148/175 Pressurized Solar Water Heater System