The industry has responded to the growing interest in alternative energy systems with a variety of heat pump systems and components. With the increasing number and complexity of the offered system solutions, not only the expertise of the professional is required, but also the knowledge of the builder, practitioner, or building planner. The book by the two authors is tailored to the somewhat different informational needs of these target groups. Depending on their interest and level of knowledge, readers have the opportunity to "read up" on exactly the information that meets their needs through an intelligent networking of the book and online content.