Thanks John, this is my suspicion - using heat pumps with a house that is already highly insulated, eco or nearly passive is a totally different proposition to an old Cotswold stone farmhouse. I know this has been raised by many as the UK housing stock is older on average than many countries. But I am more interested in our personal options. My wife is disabled and gets cold easily so lowering ambient temp is not really an option either. Will keep digging …
