Option 1: Flush-Out

Include the requirements for building flush-out or IAQ testing in the IAQ Management Plan and the project specifications. If you are pursuing both IEQc3.1 and IEQc3.2, then include the requirements for both in a single plan.

Both Options

IAQ testing is rigorous and not at all a sure thing, so take steps to increase the probability of passing the testing on the first try. This might include specifying low- and no-VOC products that go beyond those recognized by LEED credits. 

If considering IAQ testing, design the building in a way that maximizes the likelihood of passing the testing. This should include specifying low- and no-VOC materials as part of the IEQc4: Low-Emitting Materials credits, at a minimum.

Option 2: Air Testing

Consider whether your HVAC system will be able to power a flush-out while maintaining temperature and humidity levels during seasonal extremes in a timely fashion, without major scheduling impacts. A total of 14,000 cubic feet of outside air must be exchanged for every square foot of floor area. The amount of outside air prescribed during a phased flush-out (0.3 CFM) may be several times greater than the normal rate required for a project’s occupancy, based on ASHRAE 62.1-2007, as required by IEQp1: Minimum IAQ Performance. 

Consider the minimum flush-out rate of the building’s ventilation system that will be required for this credit.

Option 1: Flush-Out

Depending on your climate and the time of year the flush-out will be completed, the energy costs of doing a flush-out could vary significantly. Estimate this early on, to help inform your chosen compliance path.