Book excerpt: As fossil fuel supplies dwindle, home heating will be one of the major challenges in temperate and cold climates in upcoming years. The reserves of natural gas used to heat the majority of North American buildings are rapidly being depleted. This latest Green Energy Guide helps readers who want to slash their energy bills and reduce their dependence on scarce resources to navigate the sometimes confusing maze of clean, reliable, and affordable options. Solar Home Heating Basics focuses on renewable energy strategies to heat new and existing homes and small businesses. These include: *Energy efficiency, weatherization, and insulation *Solar hot air heating *Solar thermal systems *Passive solar heating *Backup heating systems While most solar home heating resources are geared primarily towards new buildings, this practical guide addresses ways of retrofitting existing buildings, making solar a reality for many people. Packed with all the essential information home and small business owners need to find alternatives to conventional heating solutions, Solar Home Heating Basics is your key to a personal energy solution. Dan Chiras is a respected educator and the author of thirty books on residential renewable energy and green building, including The Homeowner's Guide to Renewable Energy and Power from the Sun. Dan is the director and lead instructor at the Evergreen Institute's Center for Renewable Energy and Green Building, where he teaches workshops on energy efficiency, solar electricity, solar hot water, small wind energy, green building, natural plasters, and natural building.