PURPOSE:To equalize temperature distribution by forcibly moving the cold and hot air and make the energy for the moving of the air minimum by installing on the lower face of a ceiling distribution pipes in a required number with a certain distance among them, the distribution pipes being provided with blow-out nozzles and blowing out cool air or hot air successively and intermittently. CONSTITUTION:The whole or part of cold or hot air from a blow-out opening 3 for cold and hot air is taken into a blower 5 and this cold or hot air is made to blow out intermittently with a certain time interval from distribution pipes 7, 7'... that are arranged on the lower face of the ceiling. In blowing out this cold or hot air by a nozzle 9 which makes the blow-out opening 8 narrow and a blow-out nozzle 11 which forms a Venturi 10 as one body by support rods 15 and 15', the cold or hot air stagnant at the lower face of the ceiling is taken in from the upper and lower ends of the Venturi 10 and blown out as a jet air stream with a speed several times as fast, and after this air temperature regulation in the building is attempted by the convection flow developed by the jet air stream.
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