The Passivhaus-Institut is responsible for promoting and maintaining the Passive House - Passivhaus building program. The "Passive House Institute" was founded in 1996, and is based and active in Darmstadt, Germany.
The Passivhaus-Passive House sustainable design standards are for specific energy conservation methods and international program for Sustainable architecture design techniques and specifications to create Low-energy houses and other structures with Low energy building practices for the public benefit worldwide.
References
Passivhaus-Institut Wikipedia(Text) CC BY-SA