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The demand for air conditioning is surging. The number of air conditioners is estimated to increase form 6 hundred million to 5.6 billion, which leads to a great amount of hot exhaust generated. To lower the temperature of the emitted exhaust, the study explores the influence of shape differences on temperature reduction.The sizes of tubes and the number of vents for emission are included in the research because the sizes of tubes may affect the intensity of emission wind and the number of vents may hamper the emission wind. The purpose of the study is to find the best results to lowers the temperature of the wind