Description the window ac examination device is engineered and produced so that the students can understand construction and working of a window type air conditioner and conduct the trial on it to evaluate performance of the same. The window ac is fixed in a rigid with its, Angle frame cover cut half open to reveal the internal components of the ac. The required applied pressure and thermal conditions taping are drawn intended for gauging pressures and temperatures at salient points. Energy meter is available for recording compressor energy consumption. A sling psychometric is provided for measurement of inlet and outlet dry, Bulb & wet bulb temperature. Utilizing the assistance of velocity of, Of manometer air and consequently the flow rate of air can be determined.