Indoor Environmental Quality (IEQ)
Increase Ventilation Effectiveness (2)
Provide for the effective delivery and mixing of fresh air to building occupants to support their health, safety, and
For mechanically ventilated buildings, design ventilation systems that result in an air change effectiveness
(E) greater than or equal to 0.9 as determined by ASHRAE 129-1997. For naturally ventilated spaces
demonstrate a distribution and laminar flow pattern that involves not less than 90% of the room or zone area
in the direction of air flow for at least 95% of hours of occupancy.
Employ architectural and HVAC design strategies to increase ventilation effectiveness and prevent short-circuiting
of airflow delivery. Techniques available include use of displacement ventilation, low velocity, and laminar flow
ventilation (under floor or near floor delivery) and natural ventilation. Operable windows with an architectural
strategy for natural ventilation, cross ventilation, or stack effect can be appropriate options with study of inlet
areas and locations. See the LEED Reference Guide for compliance methodology guidelines.
Construction IAQ Management Plan (2)
Prevent indoor air quality problems resulting from the construction/renovation process, to sustain long term
installer and occupant health and comfort.
Develop and implement an Indoor Air Quality (IAQ) Management Plan for the construction and pre-occupancy
phases of the building as follows:
During construction meet or exceed the minimum requirements of the Sheet Metal and Air Conditioning
National Contractors Association (SMACNA) IAQ Guideline for Occupied Buildings under Construction,
1995, AND protect stored on-site or installed absorptive materials from moisture damage, AND replace all
filtration media immediately prior to occupancy (Filtration media shall have a Minimum Efficiency Reporting
Value (MERV) of 13 as determined by ASHRAE 52.2-1999).
Conduct a minimum two-week building flushout with new filtration media at 100% outside air after
construction ends and prior to occupancy, OR, conduct a baseline indoor air quality testing procedure
consistent with current EPA protocol for Environmental Requirements, Baseline IAQ and Materials, for the
Research Triangle Park Campus, Section 01445.
Specify containment control strategies including protecting the HVAC system, controlling pollutant sources,
interrupting pathways for contamination, enforcing proper housekeeping and coordinating schedules to minimize
disruption. Specify the construction sequencing to install absorptive materials after the prescribed dry or cure
time of wet finishes to minimize adverse impacts on indoor air quality. Materials directly exposed to moisture
contamination. Absorptive materials to protect and sequence installation include; insulation, carpeting, ceiling
tiles, and gypsum products. Appoint an IEQ Manager with owner's authority to inspect IEQ problems and require
Low-Emitting Materials (2)
Reduce the quantity of indoor air contaminants that are odorous or potentially irritating to provide installer and
occupant health and comfort.
Meet or exceed VOC limits for adhesives, sealants, paints, composite wood products, and carpet systems as
Adhesives must meet or exceed the VOC limits of South Coast Air Quality Management District Rule #1168
by, AND all sealants used as a filler must meet or exceed Bay Area Air Resources Board Reg. 8, Rule 51.
Paints and coatings must meet or exceed the VOC and chemical component limits of Green Seal
Carpet systems must meet or exceed the Carpet and Rug Institute Green Label Indoor Air Quality Test
Composite wood or agrifiber products must contain no added urea-formaldehyde resins.
Evaluate and preferentially specify materials that are low emitting, non-irritating, nontoxic and chemically inert.
Request and evaluate emissions test data from manufacturers for comparative products. Ensure that VOC limits
are clearly stated in specifications, in General Conditions, or in each section where adhesives, sealants, coatings,
carpets, and composite woods are addressed.
U. S. Green Building Council. Used by permission.
Sustainable Project Rating Tool (SPiRiT) v.1.4.1