I am planning a new build of about 120M2 between Limoges and Perigueux on a 4000M2 site site bought build to start circa 2007 In Britain I would have installed a Condensing Gas boiler to heat water and provide Central Heating BUT no mains gas. Although a Wood burner seems a valid choice on a "zero carbon" basis the thought of having to buy my heating needs in at least a year in advance as well as storage and drying the wood worries me . Has any one out there considered, researched, costed or even installed any of the following:- Central heating oil or propane powered Combined Heat and power. Ground source or Geothermal Heat Pump perhaps with heat recovery from waste water i,e around the fosse septique as well as the usual under soil receptors. a combination of the two? I am using a ten year period to compare costs Roger Thomas