Pearl Building Rating System - Estidama

Calculations
and
Methodology
The Construction IAQ Management Plan must address the following:
Step 1 - Source Control
� Design for and implement an IAQ management plan according to the measures
stipulated in SMACNA IAQ Guidelines for Occupied Buildings Under Construction, 2007,
2 nd Edition;
� Protection of all absorptive materials from moisture damage; and
� When permanently installed air handling equipment needs to be operated during
construction to serve other areas of the building, installation of MERV 8 or G4 class
filters in each return air grille during construction and replacement with new filters of
identical class immediately prior to occupancy.
Step 2 - Building Flush Out
� Thoroughly clean the building prior to commencement of building flush out;
� Complete testing and balancing of HVAC equipment;
� Assess the ambient humidity and temperature for the duration of the anticipated
building flush-out period;
� Determine the maximum fresh air delivery rate that can be provided to the whole
building through its mechanical systems such that the humidity and temperature of
the air will not exceed the buildings design basis for normal building operation;
� Provide this fresh air quantity (at design basis humidity and temperature conditions) to
the building continuously and prior to building occupation, for a period of no less than
nine consecutive days and at a fresh air rate of 2ach to all spaces or until 1,185m 3 per
m 2 internal floor area of fresh air has been delivered; and
� Continue to provide fresh air continuously, post occupation, for a period of no less
than twenty four consecutive days and at a fresh air rate of 2ach to all spaces or until
an additional 3,160m 3 per m 2 internal floor area of fresh air has been delivered. The
fresh air rate must equal or exceed the minimum rate determined in LBi-R1 or the
increased rate in LBi-1 if pursued, whichever is greater and commence at least 2 hours
prior to occupancy and continue during all occupied times in the post occupancy
building flush out period.
Step 3 – Normal Building Operation
� The air conditioning systems must be reset according to the building design basis for
ongoing operation.
Building design basis relates to design humidity and air temperature set points.
‘Continuously’ is defined as 24 hours per day.
Fresh air rate in ach (air changes per hour) must be calculated based on fresh air quantity
alone excluding re-circulated air quantities.
References � SMACNA IAQ Guidelines for Occupied Buildings Under Construction, 2007, 2 nd Edition,
www.smacna.org
� BS EN 779 2002 “Particulate air filters for general ventilation – determination of the
filtration performance”, www.bsigroup.com
Pearl Building Rating System: Design & Construction, Version 1.0, April 2010 94 of 223