Pearl Building Rating System - Estidama

LBo-R3: Outdoor Thermal Comfort Strategy
Intent To increase outdoor thermal comfort during transition months and reduce thermal
discomfort during summer months in public spaces and walkways.
Credit
Requirements
Requirement
Achievement
Credit
Submission:
Design Rating
GENERAL
Demonstrate that an outdoor thermal comfort strategy has been employed to improve
the building’s exterior microclimate. The strategy is to consider the following as
appropriate within the project’s specific context:
� Orientation;
� Shading;
� Selection of high-albedo surfaces;
� Ventilation;
� Evaporative cooling;
� Radiative cooling; and
� Thermal mass.
Shade measures (cover or shade) must be provided in all applicable spaces and achieve
the following minimum % shading:
Space Type Minimum % shading
Exterior Surface Parking with more than 10 spaces
(including parking on roof surfaces)
40%
Public Open Spaces (including privately owned) 60%
Primary Pedestrian Walkways (based on 1.8m width
within the through zone)
Secondary Pedestrian Walkways (based on 1.8m width
within the through zone)
Pearl Building Rating System: Design & Construction, Version 1.0, April 2010 55 of 223
75%
75%
Cycle Tracks 50%
Playgrounds 90%
ADDITIONAL REQUIREMENT/CLARIFICATIONS
� Where cover is provided by structures such as canopies or other architectural
elements, the outer surface of the shading element must have a minimum Solar
Reflectance Index (SRI) of 29.
� Shade from trees is to be measured at 3 years growth.
� Public realm spaces shade requirements excludes active recreational areas such as
playing fields and ball courts.
This is a requirement. There are no Credit Points awarded.
� Outdoor Thermal Comfort Strategy report highlighting all measures contributing to
improving the building’s exterior microclimate including:
� narrative;
� drawings of the public realm spaces and priority shade areas;
� Plan and tabulated results showing achievement of % of shading of applicable
spaces at 1:00pm clock time on the Equinox and Summer Solstice; and
� Extracts from specifications relating to the SRI of all cover elements.