John Siegenthaler (we call him "Siggy") is hydronic heating's
most famous Professional Engineer, and this book became an instant
classic when it first appeared in 1995. This Third Edition takes in the many advances made in recent years. The
text is 744 pages long and loaded with easy-to-follow diagrams and
full-color photos. It's a designer's dream. If you're new to hydronics and looking for a
complete, college-level course that you can savor at your own pace, this
is the book for you.