We deal with several hot water solar systems like Buderus, Apricus, Helidyne and Roth. We also service most other brands. The solar thermal systems can save alot of money if they are installed correctly. We are Apricus certified. The solar thermal systems can save as little as $300 to as much as $1,000 dollars per year and up graded to same much more. We can also tie into a boiler system to same money on fossil fuels or electricity.