What is the recommended frequency for air changes from the outside in a health setting?

In health settings, especially those that involve vulnerable populations and procedures that can generate aerosols, controlling indoor air quality is crucial to minimize the risk of airborne infections and ensure a safe environment.

The recommended frequency of 0.35 air changes per hour is based on studies that suggest this rate is effective in diluting and removing contaminants from the air, while still being manageable in terms of energy use and maintaining comfort levels. This rate allows for adequate ventilation without causing discomfort to patients and staff. It's also aligned with guidelines established by health organizations for different types of healthcare environments, ensuring a balance between air quality and operational efficiency.

Higher air change rates, such as 1, 2, or 5 air changes per hour, may be appropriate in specific situations, such as during procedures that generate more aerosolized particles, but they can lead to increased energy costs and discomfort if not carefully managed. The 0.35 air changes per hour figure represents a general recommendation that prioritizes both safety and efficiency in routine healthcare operations.