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 ...

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 ...