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Estimation of heating, ventilation and air conditioning(HVAC) noise levels in hospitals

Eroğlu, Merve
The aim of this study is to predict occupied space sound levels originating fromHeating Ventilation and Air Conditioning (HVAC) systems through air terminals and air outlets by using 2008 Standards of Air-Conditioning, Heating and Refrigeration Institute (AHRI) in order to provide hospital design information meeting acoustic goals with an emphasis onto low frequency noise termed as rumble. EXCEL Visual Basic for Applications (VBA) program is used for the development of software containing procedures of the AHRI Standard and evaluation of the predicted sound pressure level in terms of hospital space’s defined Room Criteria (RC) level. Verification of the software is performed by making use of the example given in AHRI Standard. It is observed that software output gives the same results calculated by excel programming. Effectiveness of AHRI standard is evaluated by comparisons of the software results for total sound pressure levels due to designed HVAC system of four hospital private room with sound pressure level measurements in the built room.