Abstract: The present air diffuser has a generally rectangular bottom panel mounted immediately below the outlet of a ceiling air duct. Along each side an inverted wedge strip is positioned to project across the ceiling a coherent blanket of the supply air which has been deflected horizontally outward by the bottom panel. The wedges are arranged to substantially equalize the air supply along each side, avoiding air "starvation" at the corners, thus providing a continuous coherent blanket of radial air flow. At the downstream side of each wedge strip, the altitude of each inverted wedge at its apex is substantially twice its spacing there from the bottom panel, in order to project the desired coherent blanket of air. The base of each wedge strip and the adjacent periphery of the bottom panel are inclined downward and outward to accomplish rapid induction and velocity reduction before the coherent blanket returns to the ceiling, assuring fast temperature blending and avoiding ceiling soilage.

Abstract: The present air diffuser has one or more unitary strips of adjoining tetrahedronal wedges which are progressively inclined and leaned laterally to deflect the supply air laterally outward beyond the diffuser for creating a wide, coherent, non-turbulent air blanket. At the outside of the diffuser, the wedge strip presents a series of adjoining triangular front faces which are imperforate to minimize air turbulence there when ambient room air is induced into the supply air stream emerging from the diffuser.