Incorporating a plenum can have its design advantages, but corridors serving adjoining areas of health care occupancies are prohibited from being used for a portion of an air supply, air return, or exhaust air plenum. This article and its illustrations can strengthen your grasp of the related NFPA code details and exceptions so you can design and ventilate properly for this special population.
It’s impossible to put a price on life. However, the fact that sometimes it must be done should be a further motivator to owners and engineers to get fire/smoke protection right. Revisit the past and then skip to the present, where one firm’s proactive ap-proach meets standards, simplifies design and maintenance, and even reduces labor costs.