Ever wondered if your heating or air conditioning in your house is really necessary? Passive House (Passivhaus) is a design approach to buildings that reduces the energy required drastically. This video explains briefly in 90 seconds how it's done.
Video by Hans-Jörn Eich.
About me: I'm a Certified Passive House Fan (officially: Certified Passive House Consultant) In 2013 I founded Pinwheel. Head on over to http://www.pinwheelstructures.com to see what I do.