Hi there I would like to know how did you end up with your heating bills at your new place,did you find some cheap solution and if yes how cheap and if you give me a bit more accurate informations about your place[square meters] I might have an elegant solution for you cheaper then grid gas,low cost[few hundreds of pounds],low maintenance and hassle free as far as it can be.forget the wood boiler you gotta go out in winter et your wood,keep it dry,work cost money[15-20min a day is a 2.5 hour a week who gonna pay for it and how you going to put price onto it]Geo thermal and all these new techs are not tested long term therefore it is a big questionmark,friend of me has built himself a new house in Norway paid about 15000 pounds for air to air heat condenser or what is it where it was a top of the range 6 years ago,manufacturer claim it have a same fuel consumption like a fridge and it will generate 80 centigrades of hot water for household and central heating,I have spoke with him last week and he using burning wood to heat up the house it was too awkward to ask him why but it is pretty obvious that the new technology is not so briliant.be good gotta run,will be back