Connecting areas such as offices and waiting rooms adjacent to a public parking garage must be maintained at what type of pressure?

Connecting areas such as offices and waiting rooms adjacent to a public parking garage must be maintained at a positive pressure. This is crucial for ensuring that any potential contaminants or exhaust gases from the parking garage do not infiltrate into the adjacent spaces. By maintaining positive pressure in these areas, the design helps to create a barrier that keeps the air from the garage, which may contain harmful pollutants, from entering the office and waiting room environments.

Positive pressure is achieved by supplying more air to the space than is being exhausted, which can thus help to ensure a safe and healthy indoor air quality by preventing the unwanted infiltration of outside or lower-quality air. In contrast, maintaining negative pressure could inadvertently draw air, and potentially contaminants, into these spaces, which would be counterproductive to achieving a safe environment near a parking garage.