Bachelor thesis of this manuscript is intended to study the impact wind systems within the duct (System Effect), which is caused by a change in the length of the pipe entrance way out of bowoe (Blower) is an area in front of the cut, size 3 x 3 inches and a diameter of 3.5-inch square duct and cut a circle, respectively. In this study, has tried to change the length of the pipe in the 5 to 15 cm intervals, inbound and outbound pipe lengths in the range 2 to 32 centimeters by the length of the pipe length performance. Duct Length) from 10 per cent to 125 per cent, an experiment found that at length equal to 26.2 cm effective length is the length of the tubing, the flow rate of 100% of the outgoing air to the incoming air, and minimal power consumption. By the pipe length should be less than this value. But nevertheless, the waste of energy due to the length of the pipe, duct length, efficiency is less than 100% will not charge more than the outgoing pipe as pipe bend 90°. In addition, if the pipe length is greater than the length of the pipe length 100% efficiency, the wind speed, the more outgoing and incoming power than, for example, this same trial results consistent with the theory.
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