Non Pressurize Series

This type uses the all-glass evacuated solar collector tubes as the heat-absorbind element. Tubes transfer the sun energy into heat energy. The high absorption and low emittance rate of layer films is unique on glass tube. Depending on the different density between hot water and cold water, a water flowing cycle is created in the tube. Hot water flows automatically up while the cold water flows down. The water in the storage tank will be heated from this natural circulation. Evacuated tubes, can heat water to well over 120°C.