What is one benefit of having an efficient air barrier?

An efficient air barrier plays a crucial role in maintaining indoor air quality, which is why reduction in indoor air pollution is a significant benefit. When an air barrier is properly installed and functions effectively, it minimizes the uncontrolled flow of air in and out of a building. This control not only helps to maintain comfortable temperature and humidity levels but also limits the entry of pollutants, allergens, and moisture from outside sources. Consequently, the indoor environment becomes healthier, ensuring that occupants are less exposed to harmful substances that can lead to respiratory issues or other health problems.

Other options, while they may touch on aspects of building design and performance, do not directly correlate with the primary functions and benefits of an air barrier. For instance, improved outdoor landscaping and lower requirements for exterior finishes pertain more to aesthetic and construction choices rather than the operational purpose of air barriers. Decreased building height is also unrelated, as air barriers are relevant regardless of the vertical dimensions of the structure. Thus, the measure of indoor air pollution directly aligns with the function and effectiveness of an efficient air barrier.