... used with pressure up to 6Bar/87Psi; Solar collector model:This model is pressurized, with TU1 copper heat pipe and with ... high efficiency.Solar energy collector:This model is pressurized, with TU1 copper heat pipe and with ... 3) Caravan Parks, Hotels, Schools, Public Showers/Kitchens , Restaurants4) For large scale water heating(swimming pool)Main feature:1) Reliable, efficient, twin ...