Enjoy all the hot water you need heated for free by the sun with this thermal water heating system from Eagle Sun. The system is built using a 120 gallon tank and is paired with a 80 square foot collector for maximum heating. The water is heated indirectly by heating water passing through the storage tank. The system is designed using a closed loop the keeps the separate water sources from mixing. The system is also built with a drainback system that empties the heating water once a maximum temperature has been reached or during times of low use. The system is built with a drainback reservoir allowing it to be used in colder climates.