Passive House Institute US (PHIUS)
www.passivehouse.us

Passivhaus Institut (PHI)
www.passivehouse.com

Cost Efficient Houses as European Standards (CEPHEUS)
www.cepheus.de/eng/index.html

The Passive House Webcast, PHP and Leonardo Energy
www.leonardo-energy.org/webcast/WE12/speechi.html

Passive House Slideshow
www.slideshare.net/timeian/20081118-PH-Slideshow-TDE

Marken Projects
www.markenprojects.com