Closed-loop solar water heating systems, also known as Antifreeze Systems or Indirect Systems, are for areas that can experience freezing temperatures - ever! The systems are pre-filled, and do not drain, so the pump only needs to circulate the water. Start by considering the number of people in the household. Then you will have the choice of AC or PV powered solar hot water systems and systems that come with storage tanks or without tanks.
Follow this link to see a list of organizations and utility companies that are requiring that SRCC certified products be used in their solar programs.