This comprehensive design guide includes the system definition and design recommendations that provide guidance to manufacturers, designers and specifiers regarding the key components of an advanced performance dedicated outside air system (DOAS)—previously known as a very high efficiency DOAS.

Developed and refined over several years of research, market analysis, and demonstration project installations, this system approach improves indoor-air quality and occupant comfort, and decreases energy use, compared to a conventional rooftop packaged HVAC equipment. Beyond the system requirements to effectively design to advanced performance DOAS standards, this guide outlines additional design recommendations for optimal performance.