While suspended, lay-in ceilings have long been the norm in commercial design, the open-plenum ceiling has become trendy and economical, particularly in office and retail environments. However, ...

Though suspended ceilings (above, right) remain the most popular ceiling system option, facility managers report that 17% of their total building square footage still features an open plenum ...

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 ...