What piece of equipment is recommended for ventilating a confined space?

A portable blower is the recommended piece of equipment for ventilating a confined space because it is specifically designed to move large volumes of air efficiently. This type of equipment helps to replace stagnant air with fresh air, which is critical in confined spaces where there may be hazards such as low oxygen levels or the accumulation of harmful gases.

The portability of the blower allows for flexibility in various environments, making it easy to set up wherever ventilation is needed. It ensures that air can circulate effectively, improving safety and comfort for individuals working in those areas.

While an exhaust fan is useful for removing air, it may not always be efficient in creating a complete air exchange in confined spaces. A vacuum pump typically removes air or gases, but its primary function is not ventilation. An air conditioning unit is designed for temperature control rather than air circulation specifically for ventilating confined spaces. Thus, a portable blower remains the most suitable and versatile choice for this purpose.