Read here: http://www.huffingtonpost.ca/david-dodge/netzero-homes_b_5545068.html How to build your own net-zero home If you want to build a successful net-zero project it comes down to three key points: Energy conservation Passive solar design Renewable (solar) energy production Energy Conservation: Your net-zero home needs a high quality building envelope. You need super insulated walls and ceilings, quality energy efficient windows and it all has