is one you should NOT miss. Nearly half of this text is about heat pumps - how they work, how to pick them, how to install them, how to troubleshoot and maintain them. Chase Powers covers both air-source and ground-source units, and he does it in a MOST understandable way. When he's done with heat pumps, he jumps right into radiant floor heating, furnaces, duct installation, solar, wood- and coal-fired systems and so much more. The drawings are terrific (most are courtesy of the equipment manufacturers), and there are a LOT of very useful charts. I picked up a great deal from this book and I'll bet you will too!