I was wondering if anyone had tried ( or is this in common use ) to use a combination boiller ( ELM / Bosch chaudiere murale mixte - butane version ) with 35kg gas bottles ? I live in Aude and anticipate needing heating 6-8 weeks pa only and am slightly hesitant about commitiing myself to a 20€ per month charge for a relatively short ( but sharp ! ) winter. I will want to use hot water ALL year and will probably get an additional smaller bottle for cooking. Most locals think I'm a bit mad going for the Gaz de Ville option - though perhaps they have never had the luxury before ... I will have an additional "chiminee" for the entire ground floor ( kitchen & sitting room ) as well, so I'm really looking at heating 3 bedrooms upstairs ( all newly insulated ) Two bathrooms both with mainly showers. The place will have 12 months a year use, though more activity during the summer - ie less pressure on the heating. Is this at all viable or do I just take the plunge with the GAZ standing charge. ( I say this as at some point I may only part ocuppy the house some of the year and don't want to feel too pressured by standing charges ) However, I want the house to be comfortable and resellable with "all mod cons" Any ideas or experinces ? Thanks