Pearl Building Rating System - Estidama

LBi-5.3: Thermal Comfort & Controls: Thermal
Comfort Modeling
Intent To promote projects that are designed to deliver optimal thermal comfort.
Credit
Requirements GENERAL
Demonstrate that thermal modeling has been undertaken during the design process and
that the occupied areas, or living areas and bedrooms for residential spaces, perform as
follows:
Mechanical Ventilation
Demonstrate that the Predicted Mean Vote (PMV) and Predicted Percentage Dissatisfied
(PPD) levels, calculated in accordance with ISO 7730 : 2005, are achieved during standard
operating hours of occupancy for 98% of the year.
� 1 Credit Point: Category C : PMV levels between -0.7 and +0.7 (15% PPD)
� 2 Credit Points: Category B : PMV levels between -0.5 and +0.5 (10% PPD)
Mixed Mode Ventilation
Demonstrate compliance with requirements above for the fully mechanically ventilated
period of operation, and comply with the requirements of ASHRAE 55-2004 section 5.3,
achieving 90% acceptability limits for the naturally ventilated period of operation.
Awarding
Credit Points
Credit
Submission:
Design Rating
ADDITIONAL REQUIREMENT/CLARIFICATIONS
None
.
CREDIT POINTS REQUIREMENTS
2
(maximum)
1
1
2
(maximum)
1
1
Design Rating
Category C Performance: PMV levels between -0.7 and +0.7 (15%
PPD) & 90% acceptability limits for Mixed Mode (if applicable).
Category B Performance: PMV levels between -0.5 and +0.5 (10%
PPD) & 90% acceptability limits for Mixed Mode (if applicable).
Construction Rating
Category C Performance: PMV levels between -0.7 and +0.7 (15%
PPD) & 90% acceptability limits for Mixed Mode (if applicable).
Category B Performance: PMV levels between -0.5 and +0.5 (10%
PPD) & 90% acceptability limits for Mixed Mode (if applicable).
Mechanical Ventilation Period of Operation
� Brief narrative describing how the project meets the Credit Requirements;
� Drawings of the mechanical ventilation systems, clearly indicating zone boundaries and
zone references;
� Screen shots of simulation model Thermal Zones; and
� Spreadsheet listings as per LBi-5.1 augmented with PMV and PPD results from
simulations. Note that zones must match the information provided in Credit LBi-5.1
Thermal Zoning.
Mixed-mode Ventilation Period of Operation
� Brief narrative describing how the project meets the Credit Requirements including
discussion on period of year intended for natural ventilation, mean monthly
temperatures during this period, window control strategy and tables of opening area
per window type;
� Elevation drawings highlighting extent of operable window typologies used per façade;
� Section drawings for each operable window typology showing maximum window
opening position for each operable window type; and
Pearl Building Rating System: Design & Construction, Version 1.0, April 2010 102 of 223