, there have only been 3500 Irish homes equipped with solar heating system compared to over 5 million EU households, all using free solar energy. The technology to heat water for domestic or commercial property applications with solar energy is today well developed. The collection of solar thermal energy, heating water with efficiently, storage, distribution, minimizing losses in transit are some processes that have been fine tuned. It is also a process with low contribution to CO2 emissions in the fight against global warming.