Abstract: A modular, dual-purpose architectural assembly which can provide support for basic structural elements used in constructing semi-permanent, enclosed or partially enclosed partitions defining parochial work spaces within a room and which can also supply discretely controlled heating, ventilation and air conditioning (HVAC) service, on a parochial basis, to said work space in response to local needs and varying conditions. The assembly consists of an upright, rigid, portable, elongated column which can be releasably mounted to the floor or ceiling of a room and attached to a subsurface (i.e., below the floor or above the ceiling in the room) HVAC supply system, said column having an interior channel extending longitudinally therethrough for carrying fluid from an inlet port at the base end of said channel, which inlet port is releasably connected to said HVAC supply system.