Certified Energy Auditor Practice Exam

Demand control ventilation systems are specifically designed to adjust ventilation rates based on occupancy levels. This innovative approach maximizes indoor air quality and energy efficiency by continuously monitoring real-time conditions, such as the number of occupants in a space. When occupancy levels are low, these systems can reduce the amount of outside air brought in, which can lead to significant energy savings while still maintaining a comfortable and healthy environment.

The primary goal of these systems is to ensure that the ventilation matches the actual needs of the space, providing adequate fresh air as the number of occupants fluctuates. As occupancy increases, demand control ventilation ramps up to supply the requisite airflow, thus optimizing energy usage without compromising air quality. This adaptability is particularly beneficial in spaces that have variable occupancy patterns, allowing for responsive adjustments that align with real-world usage.

In contrast, options like maintaining constant ventilation rates, eliminating the need for HVAC systems, or improving lighting conditions do not capture the essence of what demand control ventilation is designed to achieve, as they do not accommodate changes in occupancy efficiently.