长期以来，实验室通风柜的设计都是为了满足某些表面速度标准。这样的标准是委员会的“共识”标准，虽然不是毫无价值的，但缺乏广泛的实验数据的基础。除最一般的方式外，这种标准几乎忽略了送风气流或其他干扰的影响。此外，随着“辅助空气供应”发动机罩的出现，这样的表面速度标准变得不那么有意义，并且是许多辩论的主题。建议进行性能测试，可供发动机罩设计师用于开发更好的设计，也可用于测试安装和使用的发动机罩，从而考虑影响其性能的所有因素。该测试程序是ASHRAE研究项目RP的一部分- 70 (1,2).引文:研讨会论文，佐治亚州亚特兰大，1978年

Laboratory fume hoods have long been designed to meet certain face velocity standards. Such standards are committee "consensus" standards, and while not without merit, they lack a foundation of extensive experimental data. This type of standard virtually ignores, except in the most general way, the effect of supply air currents or other disturbances. Furthermore, with the advent of "auxiliary air supplied" hoods, such face velocity criteria become less meaningful and are the subject of much debate.A performance test is proposed which could be used by the hood designer in developing better designsi and which·could also be used to test hoods as installed and used, thus taking into account all the factors affecting its performance. The test procedure was developed as part of ASHRAE research project RP-70 (1,2).