With photos from an actual build in New Hampshire the reader will enjoy over dozens of tips, lessons and resources to help them finish their rocket mass heater. Information about the finish coat, building the heat riser, mistakes NOT to make and links to forums, blogs, videos, books and dvd's make this book robust and packed with left out information from the How To manuals. A genuine companion guide to have at the fingertips of anyone building their own heater. Newly updated with additional photos and bonus chapter