Les Wold, managing partner with Effect Homes, lays out how a home can be designed to produce as much energy as it consumes. One of the key design elements is taking advantage of the free energy provided by the sun. By having a lot of south-facing glass and a thermally massive floor (in this case concrete) you can get 30 to 50 per cent of your home's heat for free. See Green Energy Futures vidoe, blog and photos: http://www.greenenergyfutures.ca/episode/04/learn-how-second-wave-net-zero-home-builders-lowering-costs-and-making-it-more-accessible
