Which of the following is NOT a component of poor indoor air quality?

Window size is not considered a component of poor indoor air quality because it is a structural feature rather than a pollutant or contaminant. Poor indoor air quality is typically characterized by the presence of harmful substances or irritants in the indoor environment. Carbon monoxide, pollen, and formaldehyde are all recognized pollutants that can adversely affect air quality.

Carbon monoxide is a colorless, odorless gas that can cause serious health issues; it is often produced from fuel-burning appliances or vehicles. Pollen is a natural allergen that can enter indoor spaces and trigger allergic reactions, impacting individuals with respiratory issues. Formaldehyde, a volatile organic compound, is commonly found in building materials and household products and can lead to irritation of the eyes, nose, and throat, as well as other health problems. In contrast, while window size may influence ventilation and the extent to which air contaminants are diluted, it does not directly contribute to the presence of harmful substances in the air.