A handy web site here that looks at ways of improving the energy design of houses, not just for new builds but also in house renovation and redevelopment projects.  www.lowenergyhouse.com

Taken from the web site itself, it says,

“The Low Energy House website provides information to enable architects, house designers, house builders and landlords to deliver comfortable, energy efficient and affordable homes that will help the environment and help reduce fuel poverty.

The Low Energy House website also creates an opportunity for manufacturers and suppliers of house building components to showcase energy saving products and renewable energy technologies which will help reduce our reliance on fossil fuel energy”.

And…

They’ve also added a new section on Voltage Optimisation – HERE