Energy Studies

Local Energy Regulation and Code

All air-conditioned buildings in Singapore must comply with the local energy standards. During the building plan submission stage, the ETTV (formerly OTTV- Effective as of 1 January 2004) and U-value calculations are submitted to the Building Construction Authority for approval. The Certificate of Statutory Completion for the building is issued after the works have been completed in accordance with the approved plans. Some of the standards are presented below:

• HVAC Systems
• Buildings
• Lighting Power Budget

For details on the local energy standards, please refer to:

• Building Control (Amendment) Act 2003
• Building Control Regulations (Cap 29 , Rg. 1)
• SS CP13: 1999 - Code of Practice for Mechanical Ventilation and Air-conditioning in Building
• SS CP24: 1999 - Code of Practice for Energy Efficiency Standard for Building Services and Equipment
• SS CP38: 1999 - Code of Practice for Artificial Lightings in Building

HVAC

Indoor Design Conditions for Air-conditioned Space (Source: SS CP13:1999)

Buildings
(Source: "Guidelines on Envelope Thermal Transfer Value for Buildings" issued by Commissioner of Building Control, Building and Construction Authority, Feb 2004)

Building envelope ETTV of air-conditioned building. The ETTV for the gross area of exterior walls shall not exceed 50W/m 2. Roof ETTV of air-conditioned building. Where the roof is provided with skylights or any other materials, which allows the passage of light through, the ETTV for the gross area of the roof shall not exceed 50W/m 2. Maximum thermal transmittance for roof of air-conditioned building. For any other type of roof not mentioned in (b) above, the average thermal transmittance for the gross area of the roof shall not exceed the prescribed limits shown in the Table 1 on the right.

Roof U-value max (W/m 2 °K) Type Weight Range (kg/m 2) A/C Non A/C Light Under 50 0.5 0.8 Medium 50 to 230 0.8 1.1 Heavy Over 230 1.2 1.5 Table 1

Lighting Power Budget

Building Interior Maximum Lighting Power Budget (including ballast loss)
(Source: SS CP24:1999 and SS CP38:1999)

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