Rating System

LEED BD+C: New Construction, LEED ID+C: Commercial Interiors

Rating System Version

v2 - LEED 2.2, v2 - LEED 2.0

Inquiry

We conform to most of the requirements of EA Prerequisite 2 but found that some of them are controlled by or limited by the existing base building provisions by the landlord, which can not be changed or influenced by us as a tenant of the building. Following are the limitations for us in meeting ASHRAE 90.1-2004 and thus we ask for waiver of them: Section 5 - Building envelope - The curtain wall was completed and the SHGC slightly exceeds the ASHRAE requirement section 5.5.4 (0.22 vs 0.19). Section 6 - HVAC - The COP of the HV water chiller is 5.5 vs 6.1 as specified in ASHRAE and the COP of the air cool chiller is 2.5 vs 2.8 as specified in ASHRAE. These chillers are provided as base building specifications. Section 9 - Lighting - The lighting power density of the office area in COP has a higher allowable value than ASHRAE. The lighting power density is largely determined by the landlord and the level meet the local Hong Kong standard in which we can not influence the landlord to change it. Section 10 - Other equipment - There are AHU motors in the floor we rent which do not meet the energy efficiency requirement which is provided by the landlord. For Section 9, the Calculated Lighiting Power Density for our sapce is 14.14 W/m2 (vs 12W/m2 in ASHRAE). In the lighting design, we have already considered: - All light fittings are energy efficient lights - T5 c/w electronic ballast, parabolic diffuser, Compact Fluorescent Lamp. - Design Criteria set at 500 Lux at desk top level, which is common criteria for office design in accordance to various reputable Design Institution. - Background colour is mainly Grey/ White which has already supported a comparatively brighter environment. - Existing Lighting Power Density (14.14 W/m2) has already fulfilled the Local Code of Practice requirement for Energy Efficient Building (17 W/m2 for office) At the same time, our space are constrained by the comparatively high ceiling headroom (2.85 m AFFL) as Grade A Commercial Building provision. This unavoidably increases the lighting power density for the same Lux level be achieved. Since the light fittings and layout is basically constrained by the existing building provision, there is limited rooms for significant Lighting Power Density improvement.