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NUS School of Design and Environment Block (SDE1&3)

NUS School of Design and Environment Block (SDE1&3)

Energy Efficient low-carbon retrofit of two 40 year old existing educational buildings at the National University of Singapore. In terms of energy efficiency, both buildings should be retrofitted to achieve an energy use intensity (EUI) of 100 kWh/m2/year or lower. For SDE1, the first building to complete, a measured EUI of 45 kWh/m2/year has already been achieved.

Design challenges included the fact that the long facade of the biggest of the buildings, SDE3, was facing East and West, hence, exposed to both the low morning and the low evening sun.

An effort was undertaken to see if the existing heavy facade shading could be re-used for a lighter more elegant modern facade screen. Regretfully, it did not make financial sense.

A comprehensive design brief focusing on environmental performance targets was prepared by the client. This included hybrid ventilation, where "light air-conditioning" of 26-28 degrees Celsius is combined with creating a pleasant breeze using energy efficient and silent ceiling fans.

The buildings were officially launched on 2 February 2023 by Deputy Prime Minister, Heng Swee Keat.

Innovative Sustainability Features

• Daylight system for West facing facade
• Hybrid ventilation
• Presence and temperature sensor control of ceiling fan
• Daylight and presence sensor of lighting

Certifications & Awards

Green Mark Platinum (existing non-residential)
Green Mark Platinum (Operation Positive Energy)


Project Location:
Clementi, Singapore
2021 (SDE1)
2023 (SDE3)
Project Team:
Client: National University of Singapore
Contractor: Lian Soon Construction Pte Ltd
Architect: NUS Special Projects with CPG Consultants
ESD consultant: IEN Consultants (energy & daylight), WSP (GreenMark) and Transsolar (concept)
M&E Consultant: WSP Consultancy Pte Ltd
C&S: E2000 Pte Ltd
Landscape: Special Projects (NUS) with Yun Hye Hwang (NUS) and DP Green. Prince's Landscape Pte Ltd.
QS: Quants Associates
IEN Project Team Members:
Gregers Reimann, Joshua Chia, Michael Hirning, Bjorn Bull Hansen
Project Size:
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