Euan,
Indeed. I have thirty years of gas and electricity bills for my flat, and two can live for the same energy as one (but the gas/electricity mix seems to change).

I think some of the lavish 'aspirational' home design has to be binned. The Motorola Home of the Future 1962 looks a pig to heat, the TV is too small and I hate to think what would happen if you fell out of bed. I hope they didn't build any.

http://www.plan59.com/decor/decor073.htm

BobE

If you don't like the Motorola House you can choose from among these models.

http://www.n55.dk/NEWS/AUG_News.html