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, ...

In the hot aisle configuration, the hot air is contained between the cabinets and exhausted out of a ceiling plenum. The hot aisle containment system encloses an aisle to collect the equipment’s hot ...

All questions and answers are based on the 2011 NEC. Q. What wiring methods are allowed by the Code in spaces above a lay-in ceiling? A. Section 300.22(C) applies to spaces used for air-handling ...