What is the standard amount of fresh air room changes recommended per hour?

The recommended standard for fresh air room changes per hour in laboratory animal facilities typically falls within the range of 10 to 15 fresh air changes. This range is important for maintaining a healthy environment for the animals, as it helps to ensure adequate ventilation, control temperature, manage humidity levels, and reduce the buildup of ammonia and other harmful gases.

Proper ventilation is crucial to support the well-being of both the animals and the personnel working with them. Too few air changes can lead to stale conditions and increased exposure to harmful substances, whereas excessively high air change rates may cause drafts or temperature fluctuations that could stress the animals.

Therefore, adhering to the guideline of 10 to 15 fresh air changes balances the need for a clean and safe environment while avoiding potential negative impacts on animal welfare.