Pearl Building Rating System - Estidama

LBi-1: Ventilation Quality
Intent To promote the provision of building systems that support the wellbeing and comfort of
occupants by providing sufficient outside air ventilation.
Credit
Requirements
Awarding
Credit Points
GENERAL
Demonstrate that all of the occupied areas meet the following, as appropriate for the
type of ventilation:
Mechanical Ventilation
� 1 Credit Point: Install permanent carbon dioxide (CO2) monitoring and alert systems
to ensure the adequate provision of outside air at all times. At a minimum, one CO2
sensor must be installed at each return point. The CO2 level must not be allowed to
exceed 1000ppm.
� 1 Credit Point: After achieving the above credit point, demonstrate an increase in
outdoor air ventilation of 15% above the outdoor air ventilation rates established in
LBi-R1.
Mixed Mode Ventilation
� 1 Credit Point:
o Comply with the Credit Requirement for CO2 monitoring and alert systems for
mechanically ventilated buildings (above) for the period when the building is
in air conditioned mode; and
o Ensure the CO2 monitoring system has sensors located in the breathing zone
and is capable of alerting occupants when additional fresh air is required. At
a minimum CO2 levels must not exceed 1000ppm; and
o Undertake dynamic simulation modeling (DSM) for the natural ventilation
period of operation, to demonstrate the effectiveness of the operable
window open areas in terms of thermal comfort (as defined for Mixed Mode
buildings in LBi-5.3 Thermal Comfort Modelling), internal CO2 levels and
ventilation rates. Guidance from CIBSE AM10:2005 must be followed for all
natural ventilation strategies. Where a project is located in or has a form
that precludes the assumptions of standard tabulated pressure coefficients
across ventilation openings, the DSM model must be augmented with the
results of either wind tunnel or Computational Fluid Dynamics (CFD)
modeling to establish appropriate pressure coefficients at façade openings.
ADDITIONAL REQUIREMENT/CLARIFICATIONS
None
.
.
CREDIT POINTS REQUIREMENTS
3
Design Rating
(maximum)
1 CO2 sensors at all return points
1 Ventilation exceeds minimum requirements by 15%
1 Mixed Mode Operation (not available to retail use type)
3
Construction Rating
(maximum)
1 CO2 sensors at all return points
1 Ventilation exceeds minimum requirements by 15%
1 Mixed Mode Operation (not available to retail use type)
Pearl Building Rating System: Design & Construction, Version 1.0, April 2010 81 of 223