Passive Solar: Your Natural Solution Now

Sustainable Energy Summer Education Series - lecture by Karl Kassel and Thorsten Chlupp about Passive solar design.
Passive solar may be the ultimate energy source, and was civilization's first designed use of any renewable energy. It refers to utilizing the sun's energy without any mechanical systems or equipment involved—and, it is the only renewable energy that is truly free. There is no equipment to install or maintain, no moving parts to wear out or repair, and zero operational costs. Most people are familiar with the basic concept of south facing windows allowing sunshine to enter a house for light and warmth, but there is so much more to the concept and that you can do to increase your home's solar gain.