TABLE OF CONTENTS - The Professional Green Building Council

Theme B: Creating a livable, healthy and environmentally viable citiesrequirement of Environmental Protection Department (EPD) under windycondition.4.1.2 Natural Ventilation at CarparkThe natural ventilation performance of the Carpark has been assessed based on thecriteria as required by Australian Standard AS 1668.2-2002. Based on the designcalculation, it is found that natural ventilation alone could satisfy the ventilationrequirement of 46% of the carpark area. Consequently, the energy consumption bythe mechanical ventilation system and thus greenhouse gases emission can bereduced.4.2 Energy Conservation4.2.1 Hybrid VentilationNatural ventilation with motorized openings to be installed at low level of thecurtain wall and at the skylights will be utilized for the shopping arcade in mildseasons (i.e. spring and autumn), when the climatic condition including theambient temperature and humidity satisfy the design conditions to meet indoorthermal comfort criteria as required by ASHRAE Standard 55-2004 (Fig. 4 and Fig.5). The estimated cost saving is approximate US$513 thousand per year.Figure 4: Acceptable operative temperature ranges for naturally conditionedspaces from ASHRAE Standard 55-2004207