Properly installed, raised flooring feels as sturdy as any other flooring, and underfloor air distribution (UFAD), often combined ... Moreover, the elimination of overhead ducts means plenum heights ...

As many contractors attest, a supply air plenum is a sheet metal box attached to a furnace or air handler’s outlet and is used as a central manifold connector for other ductwork. As the air blows from ...

Examples of electrical equipment permitted in plenum spaces are air handlers, junction boxes, and dry-type transformers although transformers are not permitted to be rated over 50kVA when in hollow ...