Passivhaus Institut Darmstadt - the mother of all Passive Houses.

Cepheus - a Eurpopean Union Project. Construction of ca. 250 housing units to Passive House standards in five European countries, with in-process scientific back-up and with evaluation of building operation through systematic measurement programmes.

Specifications of a Passive House in Urbana, Illinois (USA).

Sustainable Energy Ireland on Passive Houses.

The International Energy Agency presents the outcome of task 28 "Sustainable Solar Housing".

The short history of Passive Houses in Belgium - a success story (pdf).