Mechanical Systems

What’s a DOAS?

What’s a DOAS?

Double Orange Avocado Salad? Deep Ocean Adventure Submarine? Nope, the DOAS acronym stands for Dedicated Outdoor Air System. This type of mechanical system is becoming more common in commercial building design, and is mentioned explicitly as a prescriptive requirement in many new energy codes, including both the 2015 Washington State Energy Code and 2015 Seattle Energy Code.   Key Takeaways – A Dedicated Outdoor Air System (DOAS) is a system that handles ventilation loads independently of the primary heating and cooling system – By de-coupling ventilation from space conditioning, mechanical systems can be optimized for maximum efficiency – While costs and physical constraints may limit the viability of a DOAS in some cases, it is a worthwhile HVAC strategy to examine early in design to help meet targets for code compliance, energy efficiency and occupant thermal comfort. Dedicated Outdoor Air System A Dedicated Outdoor Air System is an air handling […]