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BEAM P
LUS
I
NTERIORS
C
OMMERCIAL
, R
ETAIL
A
ND
I
NSTITUTIONAL
I
NDOOR
E
NVIRONMENTAL
Q
UALITY
(IEQ)
IEQ 4 P
RE
-
OCCUPANCY
F
LUSH
O
UT
Copyright © BEAM Society Limited. All rights reserved. Page 106
IEQ 4 P
RE
-
OCCUPANCY
F
LUSH
O
UT
E
XCLUSION
None.
O
BJECTIVE
Reduce the potential for indoor air quality problems resulting from the
construction or renovation process.
C
REDIT ATTAINABLE
1
C
REDIT REQUIREMENT
1 credit for undertaking flush-out of normally occupied project spaces
prior to occupancy.
A
SSESSMENT
Criteria
Following completion of construction and all interior finishes and after
the installation of all fixed furniture and furnishings, the occupied
spaces should be flushed out to remove the contaminants.
The flushing duration can be determined by the Applicant and subject
to calculation of fresh air required to achieve the IAQ Certification
Good Class requirements. During the flushing period, there should be
no construction or renovation activities in the vicinity of the space
being flushed.
Documentation
Credit shall be achieved when the Applicant provides the
documentation stated below, to demonstrate compliance:
i.
calculation showing the fresh air required for flushing can
comply with IAQ Good Class requirements;
ii.
method statement, with details of the flush out procedures;
iii.
record photographs, taken during flush-out period;
iv.
logbook with date, outdoor delivery rates, flushing duration,
internal temperature, humidity shall be indicated;
B
ACKGROUND
This compliance path uses the building HVAC&R system to evacuate
airborne contaminants. The flush-out may begin only after all
construction works and finishes are completed; all cleaning finalised
and all fixed furniture installed. Final test and balancing should be
completed and HVAC&R control should be functional, particularly if
the occupants will be moving in during the second phase of flush-out.
The flush-out procedure assumes the use of the building’s HVAC&R
system, but alternatives are acceptable providing they meet the air
quantity, temperature and humidity requirements.
One approach uses temporary supply and exhaust systems placed
into windows or window openings. EPA’s indoor air quality for schools
website [
1]provides information on exhaust and spot ventilation
during construction activities that can be helpful for design teams who
are considering using this approach.
Care must be taken to ensure the airflow is not short circuited,
potentially leaving remote corners within the project spaces with less
than adequate circulation, or other parts of the building with
unanticipated increases, such as a stack effect up elevator shafts.
If the interior’s HVAC&R system is used, any temporary filters and
1
EPA IAQ Design Tools for Schools, Controlling Pollutants and Sources Section 5 Ventilation Techniques.
http://www.epa.gov/iaq/schooldesign/controlling.html#Ventilation Techniques