The SolarSheat® Hot Water System is an innovative dual mode solar air space heating system for the winter and a supplemental solar domestic hot water system in the summer. The SolarSheat uses household water and does not require glycol or other additives. The system uses automatic dampers and can switch between heating and hot water modes quickly. It can be installed with a roof mount, a standard- or below-grade wall mount Ductwork not included The SolarSheat should be installed by a licensed professional Maximum 10,000 BTU/hour