Which of the following is a strategy to improve Indoor Environmental Quality?

Installing high-performance ventilation systems or air filters is a strategy that directly impacts Indoor Environmental Quality (IEQ) by ensuring a constant supply of fresh air while minimizing the presence of indoor pollutants. High-performance ventilation systems improve air circulation and filtration, which can help to remove contaminants and allergens from indoor air, promoting healthier indoor environments for occupants. This not only enhances comfort but also reduces health risks associated with poor air quality, such as respiratory issues.

In contrast, enhancing outdoor landscaping primarily contributes to the aesthetics and ecological value of a property without directly influencing indoor conditions. Using recycled materials in construction supports sustainability but does not explicitly address indoor environmental quality. Maximizing natural daylight can improve the connection to the outdoors and potentially enhance occupant well-being, but it does not ensure air quality improvements in the same direct manner as high-performance ventilation.