Solar collector : 1.Efficient,easy to install and operate; 2.Anti-corrion and anti-freeze; Solar collector :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 high efficiency.The manifold was designed by Shentai, with Solar Keymark certificate and pass EN12975 standard. The efficiency ...