Although passive house design hasn't quite caught on as the norm, Doug McDonald's Pure House imagines that it has. Described as a high-performance home, the living quarters need less heating and cooling due to thoughtful details such as orientation on the site, insulation and no spots for air to leak out.
In addition to looking and functioning beautifully, the house is totally free of the kinds of chemicals that you'd typically find in rugs and paint. There's even reverse osmosis water purification system and air filtration built in to ensure people can breathe easy. A design like the Pure House costs about 10-15% more than the average house up front, it saves homeowners in the long run by requiring 90% less energy.