What type of air is prohibited from being recirculated in swimming pool areas?

The prohibition of recirculating unfiltered air in swimming pool areas is rooted in health and safety regulations that aim to maintain a safe and hygienic environment for swimmers. Unfiltered air can carry contaminants, including bacteria, viruses, and other harmful particles that may accumulate in such enclosed spaces, particularly where water activities take place.

Recirculating unfiltered air can significantly increase the risk of the spread of airborne illnesses and negatively affect the air quality, leading to potential health hazards for pool users. In contrast, other types of air, such as dehumidified air or controlled air, have undergone processes to ensure that moisture levels are managed and contaminants are reduced, making them safer for recirculation. Makeup air typically refers to fresh air introduced to balance pressure and improve air quality in indoor environments, which is generally encouraged rather than prohibited.

Therefore, the regulation against recirculating unfiltered air is an essential factor in maintaining the safety and comfort of swimming pool facilities.