Pearl Building Rating System - Estidama

LBi-5.2: Thermal Comfort & Controls: Occupant Control
Intent To promote projects that provide individual comfort controls for the wellbeing,
productivity and thermal comfort of occupants.
Credit
Requirements GENERAL
For all space types, credits here will only be awarded where LBi-5.1 is achieved.
Demonstrate individual control as follows:
Mechanical Ventilation
The ventilation/temperature control system allows for occupant control over at least air
temperature and / or air speed as follows:
� 1 Credit Point: a minimum of one control per two occupants in the occupied area (only
applies to spaces such as teachers work areas and administrative offices within
schools).
� 1 Credit Point: In addition to the achieving the requirements above, provide occupancy
sensors linked to HVAC control systems that automatically modulate temperature and
air flowrate based on occupancy down to a minimum design setback in all multioccupant
spaces.
Comfort control can be provided by thermostatic controllers linked to on-floor plant or via
supply air terminals directly controllable and easily accessible by occupants that allow
control of temperature and/or flowrate (such as terminals located at floor level, within
workstations or via overhead terminals). Where thermostatic controllers are used in
conjunction with on-floor plant, the plant must be capable of serving no more than two
occupants.
For private enclosed spaces intended for individual use, one thermostatic controller must
be provided that allows control over air speed or temperature as a minimum.
Any fully enclosed individual space that is less than 35m 2 need only have one ventilation /
temperature control system.
In all space types, multi-occupant spaces intended for group activities (meeting rooms,
school classrooms, lecture theatres, conference halls etc) must have at least one
thermostatic controller. Where these spaces have movable internal partitions intended to
sub-divide spaces, each space must have at least one thermostatic controller.
Mixed-mode Ventilation
Where buildings are designed and built for mixed-mode operation to achieve higher energy
savings comply with :
The requirements above for mechanically ventilated buildings, and
� 1 Credit Point: The provision for operable windows as per ASHRAE 62.1.2007,
paragraph 5.1 Natural Ventilation for the 50% of the occupied area.
� 2 Credit Points: The provision for operable windows as per ASHRAE 62.1.2007,
paragraph 5.1 Natural Ventilation for the 75% of the occupied area.
ADDITIONAL REQUIREMENT/CLARIFICATIONS
Retail
All Retail areas are excluded from achieving this credit. For mixed use developments
involving retail spaces submitted under a single application for a Pearl Rating, project
teams should not include calculations and area schedules associated with retail areas.
Residential
For mechanical ventilation systems meet the requirements of LBi-5.1 Thermal Zones, and
meet the provisions for operable windows as per ASHRAE 62.1.2007 paragraph 5.1 for at
Pearl Building Rating System: Design & Construction, Version 1.0, April 2010 99 of 223