By the cooled beam system adjustment of temperature/ humidity or countermeasure to noise and introduction of fresh air which was difficult by the HVAC method has been done up to now is easier and, in case of this system the cooling effect by radiation of chilly ceiling is greater in comparison to the cooling method that was entirely relied on convection current under the existing method by cooling down ceiling exposing cover itself of cooled beam primarily by room air passed though cooling coil installed on the ceiling when room is cooling down. It will contribute to improvement of efficiency of office workers by providing agreeable room environment with draft up by formation of certain stream by the room air induced from ceiling and the fresh atmosphere jet by nozzle. In case of heating the room the effect of heating by radiation same as cooling the room is great by warm air passes through nozzle by heating the ceiling panel. .
