Dedicated outdoor-air systems (DOAS) are used in a variety of building types to provide ventilation. A DOAS can help prevent high space humidity levels when it dehumidifies the outdoor air drier than the space. But many systems designed and installed today are not dehumidifying adequately. This ENL will demonstrate the impact of the DOAS supply-air dew point on space humidity levels, at both full load and part load.
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