What is the first of the three basic methods for ventilating buildings?

The first of the three basic methods for ventilating buildings is natural ventilation. This technique relies on the natural movement of air to provide fresh air into a space and remove stale air. It leverages various natural forces, such as wind and thermal buoyancy, to facilitate airflow through openings like windows, vents, and doors, without the need for mechanical systems.

Natural ventilation is often the most energy-efficient method, as it reduces the reliance on HVAC systems, leading to lower operating costs and a smaller environmental footprint. When designed properly, it can significantly improve indoor air quality, providing beneficial health outcomes for occupants. Understanding natural ventilation is critical for LEED certification as it aligns with principles of sustainable design and can contribute to earning points in several LEED categories related to energy efficiency and indoor environmental quality.