In the IAQ-based design approach (IAQP), can air cleaning devices be included as part of the strategy to remove contaminants?

• A. No, IAQP relies only on ventilation rates and source control, not air cleaning devices.
• B. Yes, they can be included as part of IAQP to remove contaminants.
• C. Only in spaces with high outdoor pollutant loads.
• D. They must be used only in laboratory spaces.

Answer: (B)

In IAQ-based design, the aim is to meet a defined indoor air quality target by choosing a combination of controls, including source control, ventilation, and, when needed, air cleaning. Air cleaning devices can be included as part of this strategy to remove contaminants.

Air cleaning is used when dilution by outdoor ventilation and controlling sources aren’t enough to achieve the desired IAQ, or when certain contaminants are more effectively addressed by filtration or treatment. This can include in-duct filtration, portable air cleaners, or other treatment methods like UV-based systems, all chosen to meet the IAQ targets stated for the space.

This approach is flexible and performance-based, not restricted to ventilation alone, and not limited only to spaces with high outdoor pollutant loads or to laboratories. So yes, including air cleaning devices as part of the IAQP strategy to remove contaminants is appropriate.