DEDICATED OUTDOOR AIR SYSTEM (D.O.A.S) – At Total Comfort Solutions, we are driving more dollars to the bottom line of profit and loss statements daily. “DOAS” is a term given to a system that has been used extensively in Europe and in various forms in the US. The main point of a “DOAS” system is to provide dedicated ventilation rather than ventilation in buildings as an incidental part of the process of conditioning interior air.
Many studies have been conducted to demonstrate the energy and cost performance of DOAS in terms of simulations. The studies simulated the parallel system and a conventional single system for a large retail store in Dallas, St. Louis, Washington DC, and New Orleans.
RESULTS:
1) Annual energy savings of 14% to 27%
2) 15% to 23% smaller equipment capacity for the parallel cooling system
3) A 42% reduction of the annual energy usage for the DOAS system with substantial savings in both fan and chiller energy use
4) The full DOAS resulted in the annual HVAC energy cost savings ranging from 21% to 38%.
Now that is real sustainable savings!
(Source: ASHRAE & Wikipedia)
