Solar water heater
The typical household uses 10,000 to 15,000 BTUs of hot water per person per day. A 20 vacuum tube solar collector can produce 30,000 BTUs on a summer day with a footprint on a roof of only 36 square feet. The system can provide 100% of summer hot water needs and depending upon regional weather 30% of winter...
The solar collector is a part of solar system which absorbs the solar energy and converts it into heat energy. It can be used for shower system, swimming pool or space heating ect.