Here are some links you may find useful:
‘Why Choose Passivhaus?’ by The Passivhaus Trust UK
Passivhaus Institute, Germany - This is where the passivhaus standard originated. With lots of research in all areas availabel to download, you can browse in German or English. We advise using the German site as there is more information available. You can also check here to see who has their Certified Passive House qualification.
Passipedia - A wealth of passivhaus information waiting to be discovered
The Passive House Trust, UK - The Passivhaus Trust is an independent, non-profit organisation that will provide leadership in the UK for the adoption of the Passivhaus standard and methodology. At KMA we are developing the Scottish Passive House Trust regional group, bringing together the leaders in the field in the region.
AECB - The Sustainable Building Association
We will keep adding to this to build up a library of information. Please come back for updates.