Dan Chiras is a highly respected educator and the internationally acclaimed author of 30 books on residential renewable energy and green building including The Homeowner's Guide to Renewable Energy and Power from the Sun. Dan has studied and worked in renewable energy and energy efficiency fields for over three decades and is the president of Sustainable Systems Design and is the director and lead instructor at The Evergreen Institute's Center for Renewable Energy and Green Building (www.evergreeninstitute.org), where he teaches workshops on energy efficiency, solar electricity, solar hot water, small wind energy, green building, natural plasters, and natural building.