Commercial building codes are mandating higher volumes of fresh-air intake than ever before. To help meet these ventilation requirements, more and more HVAC contractors and building owners are turning to dedicated outdoor air systems (DOAS). These systems most often run in parallel with other systems to deliver 100 percent outdoor air and handle latent loads. The units improve occupant health and comfort, and they are quickly gaining popularity in the U.S.
Mike Schires, senior product manager, Modine Mfg. Co., said the use of DOAS units is one of the biggest trends he’s seen in years.