Generally, a solar vacuum tube is perfect for applications like heating water and space in the Northern climates. Solar evacuated tubes work really well for solar pool heating purposes as they can be able to heat the pool even if the weather is cloudy. They provide enormous heat energy for heating pool, water and space even when the outside temperature is minus 40 degree. 

However, solar vacuum tube water heating kits are used to harness the solar energy and turn it into hot water for your home

Evacuated Solar vacuum tubes are the essential parts for every solar collector, used for the functional absorption and conversion of sunlight into utilizable energy. Mostly the evacuated Solar vacuum tube is consists of two glass tubes merged at both ends. The gap between them consists of a solar absorbing coating over the inner tube. The evacuated layer provides an exceptional insulation that facilitates in preserve over 92% of the solar energy. To mention few design features of solar vacuum