Singapore: Energy Standards of the Building and Construction Authority (BCA)

Energy conservation standards have been incorporated into building codes.  They mandate, for example, that Overall Thermal Transfer Value (OTTV) not exceed 45 W/m2 to reduce heat transfer into a building.  These regulations were made stricter in 2001 with the introduction of Envelope Thermal Transfer Value (ETTV), a new and more accurate formulation of heat transfer into a building under local weather conditions.  The new compliance value is 35 Watts per unit area of heat gain by the building instead of 45 Watt as prescribed in the current regulations.

Date Implemented: 1979

Status: In Force; Mandatory

References: National Communication to the UNFCCC