Here are some links to some information you might find interesting:
Pro Clima Study – a study into why airtightness in residential homes is so important.
Energy Efficiency & Conservation Authority – the Government’s website on what you should know. A good starting point.
The Living Building Challenge – How to build while treading lightly on the environment.
The Passive House Institute of New Zealand – How to design and build the most recognised low energy buildings in the world.
More to come….