Source control is a primary method used to improve indoor air quality by which of the following actions?

Source control is a primary method used to improve indoor air quality by which of the following actions?

• A. Reducing pollutant sources
• B. Increasing filtration
• C. Boosting ventilation
• D. Adding humidification

Answer: (A)

Source control focuses on preventing pollutants from entering indoor air by removing or reducing emissions at the source. This is the most effective way to improve IAQ because if contaminants aren’t produced or released, there’s less to remove or dilute later. In practice, this means selecting low-emitting materials and products, enclosing or containing processes that release pollutants, storing solvents and fuels properly, using fewer or greener chemicals, and maintaining moisture control to prevent mold growth. In building automation and facilities work, these ideas translate to careful design choices, procurement specs for low-VOC materials, containment or enclosure of processes, and robust housekeeping and maintenance practices that minimize emissions from equipment and operations. Filtration, ventilation, and humidification can help IAQ, but they address pollutants after they’re generated or introduce new considerations (for example, ventilation brings in outdoor air that may carry pollutants, and humidification can raise moisture levels that promote mold). By targeting the pollutant source, you reduce the overall burden on control systems and improve IAQ more efficiently.

Source control focuses on preventing pollutants from entering indoor air by removing or reducing emissions at the source. This is the most effective way to improve IAQ because if contaminants aren’t produced or released, there’s less to remove or dilute later. In practice, this means selecting low-emitting materials and products, enclosing or containing processes that release pollutants, storing solvents and fuels properly, using fewer or greener chemicals, and maintaining moisture control to prevent mold growth. In building automation and facilities work, these ideas translate to careful design choices, procurement specs for low-VOC materials, containment or enclosure of processes, and robust housekeeping and maintenance practices that minimize emissions from equipment and operations.

Filtration, ventilation, and humidification can help IAQ, but they address pollutants after they’re generated or introduce new considerations (for example, ventilation brings in outdoor air that may carry pollutants, and humidification can raise moisture levels that promote mold). By targeting the pollutant source, you reduce the overall burden on control systems and improve IAQ more efficiently.