to implement a building flushout or Indoor Air Quality (IAQ) test
to demonstrate air quality problems will be reduced from the
OPTION 1 - Flushout
Supply a total air volume of 14,000 cu. ft. of outdoor air per sq.
ft. of floor area maintaining a temperature of at least 60F and
relative humidity less than 60% prior to occupancy. All interior
finishes must be installed prior to flushout.
If occupancy is desired prior to completion of flushout, space may
be occupied after 3,500 cu.ft. of outdoor air per sq. ft. of floor
area has been delivered. Consequently, the space must be ventilated
with at least 0.30 cfm / sq. ft. of outside air until 14,000 cu.
ft. of outdoor air per sq. ft. of floor area has been
OPTION 2 - Air Quality Testing
Conduct baseline IAQ testing after construction and prior to
occupancy following the testing protocols determined by the United
States Environmental Protection Agency Compendium of Methods for
the Determination of Air Pollutants in Indoor Air.
Maximum concentration limits for contaminants defined by LEED must
not be exceeded for credit compliance.
- If flushout option, incorporate 2-week period in construction
schedule early in design.
- If IAQ test option, determine if the associated cost will be a
contractor's or owner's contingency.
- Consider including both flush-out and testing options in the
specifications to allow the construction schedule to dictate
whether the two-week building flush-out is feasible. Alternatively,
if the schedule does not permit, IAQ testing is already in the
- It is possible to stage the flushing of a building if areas are
separated physically and the mechanical systems can operate
separately. Once the area has been flushed out, however, it is
necessary to maintain separation from areas under construction per
SMACNA Guidelines for Occupied Buildings.
- If IAQ testing is chosen, quality control in the field will be
more stringent due to strict LEED requirements about what can and
cannot be present during testing (furniture, etc.).
- Commissioning activities may occur during the building
- 52% of all California LEED Certified projects achieved this
credit for LEED v2.1.
Additional EDR Resources
Design Briefs: Indoor Air
Design Briefs: Field