Fuel cell systems have the potential to revolutionize the way power is generated in the 21st century, much like the internal combustion engine did in the last century. For building applications, fuel cell systems offer modularity, high efficiency across a wide range of load conditions, minimal environmental impact and opportunities for integration into cogeneration systems. This book discusses the different types, characteristics and potential applications of fuel cells and fuel cell systems in depth. It also provides valuable information on cogeneration systems in buildings, as well as on fuel cell subsystems and fuel cell system design. Cogeneration systems in buildings are thoroughly reviewed, as are application requirements for office buildings, hotels and motels, restaurants and grocery stores, health care facilities, schools and factories. This book is essential to any building designer or contractor that demands in-depth, authoritative information about the very latest emerging technologies in HVAC&R. ASHRAE Research Project 1058.