Passive homes are popping up all over Europe and Japan, and, finally, here in the U.S. What is a passive home? A house that keeps its aggression at bay, of course! No, a passive home uses insulation and an airtight shell so that barely any heat escapes and barely any cold seeps in, which means it can use up to 90% less energy than a conventional house. Appliance heat and human body heat are both used, along with the sun, to heat the house. The real kicker is that in some countries, like Germany, the real... READ ON