I'm in the process of building a new house in WA. 5x2 with granny flat. I'm tryna be energy and cost efficient as much as possible. I have seeb good reviews and ratings about iStore Air to Energy hot water system and wanted to know what your experiences with it was as it seems uncommon. Does it actually save energy? Lower running costs? What was your installation cost? etc.
Any help and advice or recommendations is appreciated.