The client already knew he wanted a dual fuel boiler as he had ready access to certified logs. He also knew that he may also want the capability of running this 'hands off' using the automatic pellet feeder, and also have the benefit of auto ignition via the pellets boiler which can then start fire in the combustion chamber to use the logs. The client built a bespoke garage with half of this reserved for the boiler room and log store. This was 30M from the house and connect to the house via underground pipe and heat exchanger in the kitchen. As the garage looked south, we installed x12, 280W Solar PV panels (3.36KW) as this was the most cost effective panel to get the greatest output.