The Ecological Engineer is a book series that celebrates the most innovative engineers in North America and the practices and principles that they use to produce functionally outstanding structures, systems and technologies, in a way that embraces the emerging philosophy of sustainable design.

Volume One: KEEN Engineering focuses on the innovative work of one of the leading sustainable MEP firms in North America -- KEEN Engineering. As mechanical, electrical and plumbing engineers who work on projects all over the continent, they have consistently been inspiring on multiple levels - as a company, as individuals and just by the sheer volume and quality of their work. Organized into three critical sections –- Practice, Principles, and Projects –- the book provides a valuable resource and touchstone for engineers, architects, and other building professionals who hope to embrace an ethic that is responsible to both people and the environment.