Planning a Passive House
From PassREg - Solutions Open Source
Passipedia
Comprehensive information on Passive House design presenting in the form of individual articles covering the key aspects of Passive House design (thermal insulation, windows, airtightness., thermal bridge free design, ventilation, heating, cooling, DHW, PHPP etc.) and ranging from general information to in-depth knowledge.
More information:
English: Passipedia: Planning
German: Passipedia: Planung