A running fan and a clean-agent label create false confidence

A fictional protected room has a running exhaust fan but no verified damper-open feedback and uncertain replacement-air paths. A separate gaseous system is described as clean, so a manager proposes allowing people to remain during discharge and immediate re-entry afterward. Neither exposure nor the actual release and clearance arrangements have been assessed. This exercise releases no agent and authorizes no entry. Explain why component operation and a product label do not establish the intended smoke-control or occupant-safety outcome, and identify the need for the actual competent design, warning, evacuation, pressure, exposure and restoration basis rather than a universal dose or delay.