SunDogHeat.com

Estimates of Solar Use:

Solar for 20% of Heating Needs | 90% of Cooling Needs

Solar for 40% of Heating Needs | 80% of Cooling Needs

Solar for 80% of Heating Needs | 50% of Cooling Needs

images from:

http://www.rpco.com/products/solar/solar_uscanada.htm