Which prerequisite applies to all projects regarding indoor air quality?

The prerequisite that applies to all projects regarding indoor air quality is the IAQ Minimum Indoor Air Quality Performance. This requirement is essential because it ensures that the project meets a baseline level of indoor air quality, allowing for a healthy and comfortable environment for occupants. By focusing on proper ventilation and reducing harmful indoor pollutants, this prerequisite is foundational to promoting overall occupant health and well-being.

The other options, while related to indoor air quality, address specific aspects or advanced strategies that may not be universally required for all projects. For instance, Environmental Tobacco Smoke Control is targeted at mitigating smoke exposure, which may not apply to every building type or project context. Similarly, Minimum Acoustic Performance and Enhanced Air Quality Strategies involve additional criteria and enhancements that go beyond the basic requirements for all projects, only applying in certain scenarios or for achieving additional credits.