Plenum: designed to fit in a wall of a building and accommodate the plants. Removable plant trays: accommodate growth media, plants, lights, and a watering device. Back duct: combines multiple air ...

HVAC fans and blowers can be mounted to an exterior wall (ventilation unit) or above the ceiling (plenum fan), or used as part of a ducted system (duct fan). The fan spins or the blower turns by means ...

An underfloor plenum is the open service distribution space between a structural concrete slab and the underside of a raised, or access, floor system (Figure 4.1a). As shown in the photo in Figure ...