Construction Indoor Air Quality Management Plans for LEED Matt Gregg, PE, LEED AP
Agenda What is a Construction IAQ Management Plan? What are the LEED Requirements? What is the Mechanical Contractor s Approach?
What is a Construction Indoor Air Quality Management Plan?
What is a Construction Indoor Air Quality Management Plan? Plan to reduce indoor air quality (IAQ) problems resulting from construction Promotes the comfort and well being of building occupants and construction workers
What is a Construction Indoor Air Quality Management Plan? Document that defines construction scope! Included scope Excluded scope
What are the LEED Requirements?
Construction IAQ Management Plan During Construction Develop and Implement an IAQ Management Plan for the construction and preoccupancy phases of the building as follows: Meet or exceed the recommended control measures of the SMACNA IAQ Guidelines for Occupied Buildings Under Construction Protect stored on-site and installed absorptive materials from moisture damage If permanently installed air handlers are used during construction, filtration media with a MERV of 8 must be used at each return air grill.
Construction IAQ Management Plan During Construction Meet or exceed the recommended control measures of the SMACNA IAQ Guidelines for Occupied Buildings Under Construction HVAC Protection Source Control Pathway Interruption Housekeeping Scheduling
HVAC Protection Avoid using permanently installed HVAC systems during construction if possible
HVAC Protection Protect all HVAC equipment from both dust and odors and seal all duct and equipment openings with plastic
Source Control Recover, isolate, and ventilate containers housing toxic materials. Exhaust fumes from idling vehicles and gasoline and diesel fueled tools.
Pathway Interruption Isolate areas of work to prevent contamination of clean or occupied spaces Provide temporary barriers Maintain negative pressure relative to other spaces
Housekeeping Use Vacuum cleaners with high efficiency particle filters Use wetting agents for dust
Scheduling Conduct activities with high pollution potential during off hours to allow time for new materials to air out. Allow adequate time for flush-out and IAQ test procedures prior to occupancy
Construction IAQ Management Plan During Construction Protect stored on-site and installed absorptive materials from moisture damage
Construction IAQ Management Plan During Construction If permanently installed air handlers are used during construction, filtration media with a MERV of 8 must be used at each return air grill.
Construction IAQ Management Plan Before Occupancy Option 1 - Flush-Out Path 1 Completed pre-occupancy OR Path 2 Completed post-occupancy Option 2 Air Testing
Construction IAQ Management Plan Before Occupancy Option 1 - Flush-Out Path 1 After construction ends, prior to occupancy and with all interior finishes installed, install new filtration media and perform a building flush-out by supplying a total air volume of 14,000 cubic feet of outdoor air per square foot of floor area while maintaining an internal temperature of at least 60 F and relative humidity no higher than 60%.
Construction IAQ Management Plan Before Occupancy Option 1 - Flush-Out Path 2 If occupancy is desired prior to completion of the flushout, the space may be occupied following delivery of a minimum of 3,500 cubic feet of outdoor air per square foot of floor area. Once the space is occupied, it must be ventilated at a minimum rate of 0.30 cubic feet per minute per square foot of outside air or the design minimum outside air rate, whichever is greater. During each day of the flush-out period ventilation must begin a minimum of 3 hours prior to occupancy and continue during occupancy. These conditions must be maintained until a total of 14,000 cubic feet of outdoor air per square foot of floor area has been delivered to the space.
Construction IAQ Management Plan Before Occupancy Option 2 Air Testing Conduct baseline IAQ testing after construction ends and prior to occupancy. Demonstrate that maximum allowable concentrations of contaminants are not exceeded.
What is the Mechanical Contractor s Approach?
Mechanical Contractor Approach to IAQ Indoor air quality plan Flush-out plan Jobsite training Shop inspection checklist Jobsite inspection checklist Flush-out checklist
Shop Inspection Checklist Shop fabricated ductwork Shop storage Jobsite deliveries Photo documentation
Field Inspection Checklist Jobsite Deliveries Jobsite Storage Jobsite Cleanup Moisture Control Installation Photo documentation
Flush-Out Checklist Pre-occupancy Start date and time Outside airflow rate Space Temperature Space Humidity Total outside air delivered Post-occupancy Start date and time Outside airflow rate Space Temperature Space Humidity Total outside air delivered
Questions?