Should ventilation to open air of manholes, tunnels, and vaults occur wherever practical?

Ventilation to open air of manholes, tunnels, and vaults is essential for maintaining safety and health standards within these confined spaces. The correct answer is rooted in the need to ensure adequate airflow, which helps to prevent the accumulation of harmful gases, control temperature rises, and facilitate the exchange of fresh air.

Open air ventilation reduces the risk of asphyxiation, explosion, and heat-related illnesses that can arise from poor air quality and oxygen deficiency. This practice is vital not only for the safety of workers who may need to enter these spaces but also for the effective operation and longevity of the equipment and systems housed within them.

While there may be specific scenarios where ventilation might not be implemented, such as during certain types of maintenance or in extreme temperatures, focusing solely on those circumstances can compromise overall safety. Therefore, ensuring ventilation wherever practical is a fundamental safety standard in the industry.