What is the minimum distance the breathing zone region must be from the walls or fixed air-conditioning equipment?

The minimum distance for the breathing zone region from walls or fixed air-conditioning equipment is 2 feet. This distance is crucial to ensure that the air supplied into the breathing zone is not contaminated or obstructed by nearby surfaces or objects, which can affect air quality and circulation.

Maintaining this 2-foot clearance helps to facilitate adequate air mixing and distribution, promoting efficiency in HVAC performance. It ensures that the air being processed and delivered to occupants is at the right temperature and is fresh, thereby enhancing comfort and health.

Choosing a distance that is too small, such as 1.5 feet, 1 foot, or 0.5 feet, could lead to situations where airflow is hindered or where air quality is compromised, as air may not circulate properly or could pick up contaminants from the walls or equipment. Therefore, adhering to the 2-foot guideline is essential for optimal HVAC operation and indoor air quality.