ID#2053 made on
EAp2 - Minimum energy performance
LEED BD+C: New Construction, LEED ID+C: Commercial Interiors
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...
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.
The applicant is requesting a waiver from some of the requirements of ASHRAE 90.1-2004 that are controlled by or limited by the existing base building provisions of the landlord, which can not be changed or influenced by the applicant as a tenant of the building. The applicant should refer to the section in the LEED-CI 2.0 Reference Guide page 135 titled "Applying ASHRAE 90.1-2004" for further guidance. Any and all areas that are not part of the tenant scope and controlled exclusively by the landlord may be exempt from the requirements of the Standard. Please also refer to section 184.108.40.206 of ASHRAE 90.1-2004. However, any items controlled by the tenant and that are covered under sections 5 through 10 of ASHRAE 90.1-2004 must comply with the specific requirements of that section. Alternatively, if the applicant cannot demonstrate prescriptive compliance with the Standard, the applicant may use section 11 Energy Cost Budget Method to demonstrate compliance. The applicant must meet all requirements of section 11 to be able to demonstrate compliance. Further guidance on the Energy Cost Budget Method is available in the ASHRAE 90.1-2004 User's Manual. For the purposes of the submittal, please clearly list the option used to demonstrate compliance. Compliance forms for individual sections are published by ASHRAE. For both options please provide a detailed narrative clearly defining the tenant's scope of work as it pertains to items covered by ASHRAE 90.1-2004. Applicable Internationally.
Related Addenda (Corrections & Interpretations)