Abstract
A case history of an indoor HVAC noise problem in a new residential building will be presented. Noise measurements collected in the living room and in the bedroom of the impacted living unit will be examined using several of the available noise criteria methods including, NC, RC, NCB, and RNC (ANSI S12.2). Although the architect and the building owner believed that the HVAC noise was unacceptable, the measured noise levels met the NC, NCB, and RNC noise criteria. Only the RC method was able to accurately detect the problem.
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