Though vital to maintaining good indoor-air quality, outdoor air can be expensive to temper and, if not conditioned properly, cause humidity problems in a building. Increasingly, however, designers are finding dedicated outdoor-air systems (DOAS) to be an energy-efficient and easily verifiable way to comply with ANSI/ASHRAE Standard 62.1, Ventilation for Acceptable Indoor Air Quality. This article will discuss DOAS, which supply cooled, dehumidified outside air to buildings such as ...

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