In the typical American home, heating and cooling account for close to 50 percent of all energy use. This means that regulating your household temperature can cost you a bundle in terms of fuel bills, and add appreciably to your carbon footprint. However, it's possible to increase the efficiency of your HVAC system by as much as a surprising 20 percent, using green techniques.  See full article.

  In the typical American home, heating and cooling account for close to 50 percent of all energy use. This means that regulating your household temperature can cost you a bundle in terms of fuel bills, and add appreciably to your carbon footprint. However, it's possible to increase the efficiency of your HVAC system by as much as a surprising 20 percent, using green techniques.  See full article.