BCA Green Mark for Existing Schools Version 1.0 - Building ...

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BCA Green Mark Version ES/1.0 Existing Schools Criteria (Version 1)Energy Related RequirementsPart 1 - Energy Efficiency (Total Points: 87)Green Mark Points1-1 Energy Efficiency (10 points)(a) To achieve increased building energyefficiency against similar building types topromote efficient use of energy.Option AOption A is applicable for buildings where energybenchmarks are not available. Energy savingsover its own historical baseline over the last threeyears must be demonstrated.Option B- EUI of 46.5 kWh/m2/yr for Primary schools- EUI of 42 kWh/m2/yr for Secondary schools- EUI of 65 kWh/m2/yr for Junior CollegesOption A2 points for achieving 5% energysavings from own historical baseline0.3 point for every subsequent percentageimprovement from baseline of 5% energysavingsOption B2 points for achieving the stated energybenchmarks0.1 point for every subsequent percentileimprovement from baseline of the statedenergy benchmarks. See Appendix A forpercentile graph.(up to 10 points)1-2 Percentage of non air-conditioned areasbased on total GFA (10 points)0.1 point for every percentage of non airconditionedareas excluding carpark areas(up to 10 points)Pre-requisite Requirement: 5 pointsfrom this section1-3 Building Orientation and NaturalVentilation (15 points)(a) Minimum direct west facing façade throughbuilding design orientation.Note: Orientation of façade that falls within the range of 22.5° N ofW and 22.5° S of W will be defined as west facing facade. Corewalls for lifts or staircases and toilets that are located within thisrange are exempted in computation.Applicable to Naturally Ventilated BuildingAreasPoints awarded = 5 – 0.1 x (% of westfacing facade areas over total façadeareas)(Up to 5 points)Where there is no west facing façade, thetotal points awarded for this item will be 15points; the items 1-3 (b)(i) and (b)(ii) aslisted below will not be applicable.(b)(i) Minimum west facing window openings.Points awarded = 2.5 - 0.1 x (% of westfacing window areas over total west facingfaçade areas)Effective Date: 1 Sept 2011 5
BCA Green Mark Version ES/1.0 Existing Schools Criteria (Version 1)(b)(ii) Effective sunshading provision for windowson the west façade with minimum shadingof 30%.(c) Proper design of building layout that utilizesprevailing wind conditions to achieveadequate cross ventilation.Points awarded = 0.025 x (% of westfacing window areas with sunshadingdevices over total west facing façadeareas)(Up to 5 points for 1-3 b(i) & b(ii))0.5 point for every 10% of units withwindow openings facing north and southdirectionsPoints awarded = 0.5 x (% of units /10)(up to 5 points)Pre-requisite Requirement: 12 pointsfrom this section1-4 Active Design (15 points)a) Mechanical fan systemPower budget (W/m 2 ) for the mechanicalventilation system should be calculated.Applicable to Air-conditioned/MechanicalVentilated Building Areas (>500m 2 )2 points for achieving Efficiency of 0.47 Wper m 3 /h for constant air volume fan and0.74 W per m 3 /h for variable air volume fan1 point for every subsequent 1%improvement from 0.47 W per m 3 /h or 0.74W per m 3 /h(Up to 15 points)OR(b) Unitary Air-Conditioners/CondensingUnits/Air-Cooled Centralised Plant : Single-Spilt Unit Multi-Spilt Unit Variable Refrigerant Volume (VRV) System Air-cooled Chiller and pumps Packaged Units*If all unitary air conditioners are rated minimum2 ticks under the NEA Energy Labeling Scheme,7 points will be awarded.1-5 Lighting System (13 points)To encourage optimization of lighting systemefficiency(a) Lighting power budgetOR2 points for achieving Efficiency of 2.4COP1 point for every subsequent 0.1 COPimprovement from 2.4 COP(Up to 15 points)Note: Where there is a combination of (a)and (b), the computation of the pointsawarded will be based on the pro-ration ofpoints based on floor area ventilated byactive design6 points for achieving lighting densityof 15% better than lighting powerbudget in SS5300.2 point for every subsequent percentageimprovement from baseline lighting densityof 15% better than lighting power budget inSS530Points awarded = 0.2 x (% improvement15% better than lighting power budget inSS530)(Up to 10 points)Effective Date: 1 Sept 2011 6
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