BBC

A £3m renewable energy system, which will be one of the largest of its type in the UK, is to be built into a controversial Old Town development. The Caltongate scheme has been awarded a grant of over £789,000 by the Department of Trade and Industry for a special heating and cooling system. The developers hope this will reduce its carbon footprint by at least 30%. Installation is to be completed by December 2008 if planning applications for the £300m development are accepted. The system works by tapping into the natural temperature deep underground, which is between 11C and 13C, to provide heat in the winter and cooling during the summer.