Here is an interesting zero-carbon house concept: Barratt's Green House is packed with the latest technology including solar panels, rain water harvesting and an air-source heat pump. Its new kind of concrete walls and floors, combined with super insulation and triple-glazed windows makes it airtight, meaning the requirement for heating is minimal. Fresh air entering the passes through a heat exchanger, which transfers the heat from the outgoing stale air and puts it back into the house. A rainwater harvesting system collects water for use in flushing toilets.
http://www.guardian.co.uk/environment/2008/may/15/greenbuilding.renewableenergy
Useful links:
www.barratthomes.co.uk
www.bre.co.uk
www.gauntfrancis.co.uk
It's a great idea, but in my view, success depends on affordability.
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