LEED AP with Operations and Maintenance (O+M ) Practice Exam

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Which of the following actions should a project take to enhance Indoor Air Quality (IAQ)?

Increase indoor humidity levels
Prohibit the use of non-toxic cleaners
Supply at least some fresh air
Limit the amount of carpeted floors

The correct answer is: Supply at least some fresh air

Enhancing Indoor Air Quality (IAQ) is essential for occupant health and comfort. Supplying at least some fresh air is crucial because it helps dilute indoor pollutants, bringing in outdoor air that typically has a lower concentration of contaminants. Fresh air can significantly decrease levels of volatile organic compounds (VOCs), carbon dioxide, and other harmful substances that can accumulate indoors. Maintaining a proper ventilation strategy, which includes supplying fresh air, is fundamental in reducing indoor air pollution and promoting a healthier indoor environment. This action not only supports occupant health but also aligns with LEED standards focusing on sustainable and healthy building practices. Ensuring adequate ventilation meets the requirements suggested in ASHRAE standards, which guide effective strategies for improving IAQ. In contrast, increasing indoor humidity levels can lead to mold growth and promote dust mites, while prohibiting non-toxic cleaners would further diminish a healthy indoor environment. Lastly, reducing carpeted floors can improve IAQ but is not as directly impactful as ensuring a fresh air supply.