LEED AP Building Design and Construction (BD+C) Practice Exam

What is considered a densely occupied space when monitoring CO2 concentrations?

1. 10 people per 1,000 square feet

2. 15 people per 1,000 square feet

3. 25 people per 1,000 square feet

4. 30 people per 1,000 square feet

The correct answer is: 25 people per 1,000 square feet

A densely occupied space, in the context of monitoring CO2 concentrations, is typically defined as having a high number of occupants compared to the area of the space. This density impacts indoor air quality since higher occupancy leads to greater CO2 production, necessitating effective ventilation strategies to maintain acceptable levels of indoor air pollutants. The standard often referred to in building design and health guidelines states that a space with over 25 occupants per 1,000 square feet is considered densely occupied. This is significant because CO2 levels can quickly rise in such environments, which can affect occupant comfort and health. Therefore, spaces meeting or exceeding this benchmark should have more stringent monitoring and ventilation requirements to ensure air quality is maintained. Density thresholds lower than 25 people per 1,000 square feet generally don't require the same level of scrutiny, as they are less likely to lead to problematic concentrations of CO2 and other pollutants, thus explaining why the designated answer identifying 25 people per 1,000 square feet as densely occupied is the most accurate.