How should the vent from a pneumatic ejector system be configured?

The correct answer indicates that the vent from a pneumatic ejector system should be vented independently from other vents. This configuration is essential for ensuring that there is no cross-contamination or interference between the pneumatic ejector system and the building's other venting systems. An independent vent helps maintain appropriate air pressure and flow for the ejector system, which is vital for its effective operation and for complying with building codes.

In a pneumatic ejector system, the vent must prevent backpressure that could disrupt the function of the ejector. This independent venting also aids in safely dispersing any gases or odors that might arise, ensuring that they do not mix with other systems that could lead to problems like venting failures or health hazards.

The other configurations, while they might seem plausible under certain circumstances, do not prioritize the essential operational needs of a pneumatic ejector system as effectively as having an independent vent. Connecting to building vent systems could create complications with pressure and potential backflow issues, while minimum distance or proximity to the roof doesn’t adequately address the venting’s necessity to function properly and independently.