• The only other book in print on this topic is self-published and poorly produced. • This edition is considerably revised and updated since its first printing in Fall 2007. • This edition is a Mother Earth Wiser Living Series selection. • Filled with graphs and illustrations. • The book fills an increasingly important niche as people hurry to equip their houses with renewable energy systems. • The author has 35 years experience and is a widely acknowledged expert in this field. • The first edition has sold over 16,500 copies. • Hot water systems can be used to heat water or as space heating: both are covered in this book.
