Thursday 23 June 2005 8.49am
I'd recommend you to look at this site which may be a template for your project:
Until building regulations in this country are changed to force builders to build efficient buildings, owners will be forced to retro-fit insulation and energy saving features. Retro-fitting is, demonstrably, the most expensive way of achieving savings but because of 'property insanity' it seems relatively inexpensive (for us, not for the planet).
Insulation, allied to ventilation, is the simplest and lowest-tech method of gaining efficiency and making savings. Solar panels, photovoltaics, geothermal, reeddbeds, poo farms, wind turbines and all the rest can only be justified if the expenditure is made at the build stage and even then payback period makes the investment of doubtful benefit (until oil reaches $100 a barrel that is).