本文描述了一个系统平衡器在试图对暖通空调系统进行常规测试和平衡时，遇到系统效应时所面临的困境。粉丝们的表现并不符合他们的分类等级。它们很少在没有限制入口或排放的情况下安装，这会产生系统效应。探讨了系统对风机影响的一个典型例子。结论是，如果可能，必须认识到并消除系统效应。向建筑师、业主、工程师、风扇制造商、钣金承包商以及美国采暖、制冷和空气协会提供建议- 空调工程师（ASHRAE）就各自如何帮助解决系统效应造成的困境进行了讨论。引文:ASHRAE Transactions，1983年，第89卷，pt。新泽西州大西洋城1B号

This paper describes the dilemma of a system balancer when he is confronted with system effect in trying to routinely test and balance a heating, ventilating, air-conditioning (HVAC) system. Fans do not perform in accordance with their catalog ratings. They are seldom installed without restricted inlets or discharges, which creates system effect. A typical example of system effect on a fan is explored. The conclusion is that system effect must be recognized and eliminated if possible. Recommendations are given to architects, owners, engineers, fan manufacturers, sheet metal contractors, and the American Society of Heating, Refrigerating ad Air-Conditioning Engineers (ASHRAE) as to how each can help solve the dilemma caused by system effect.