ASHRAE手册和产品目录以及任何其他实验室设计或安全手册均未包含有关通风柜设计、选择、尺寸、调整、测试和维护的充分信息。许多著名的作者已经认识到空气供应分配、实验室家具布置、辅助空气供应和其他外部影响对发动机罩性能的关键性质，但没有人将所有因素纳入综合标准。其他人已经开发了使用高灵敏度气相色谱法的定量性能测量技术，但没有公认的标准测试程序。除了标准测试程序外，还迫切需要基本的实验室发动机罩性能标准。 性能标准和测试程序是相互依存的。现有的绩效标准虽然是可用的最佳标准，但是委员会达成共识的努力，其中只有一部分得到了客观、定量数据的支持。此外，这种类型的可用标准存在分歧且不一致。一些研究人员进行了重要的调查，这些调查构成了当前标准的基础（见参考文献）。然而，这些都不能单独或一起满足性能标准的需要。本研究项目的第一阶段基于这样一个前提:良好的性能测试是追求以下标准的基础:（1）房间送风分配的设计、空气扩散器的类型和布置；（2）研究实验室或工业实验室通风柜的设计、选择、尺寸、测试和维护。 标准性能测试的标准如下:合理地代表了通风罩的实际挑战，适用于现场使用，以测试已安装的通风罩，考虑到一般房间通风的影响和所有其他“已安装”因素，适用于车间使用，对于无污染且在大多数情况下无污染的烟罩开发商或制造商而言，采用ASHRAE标准非常便宜和方便:ASHRAE交易，第83卷，第一部分，伊利诺伊州芝加哥

Neither the ASHRAE HANDBOOK & PRODUCT DIRECTORY nor any other laboratory design or safety manual contains adequate information on designing, selecting, sizing, adjusting, testing and maintaining fume hoods. Many noted authors have recognized the critical nature of air supply distribution, laboratory furniture arrangement, auxiliary air supply and other external influences upon hood performance, but none have integrated all factors into a comprehensive criteria. Others have developed quantitative performance measuring techniques using high sensitivity gas chromatography, but there is no recognized standard test procedure.In addition to a standard test procedure, basic lab hood performance criteria are badly needed. The performance criteria and the test procedure are mutually interdependent. The existing performance criteria, although the best available, are committee consensus efforts, only part of which have any demonstrable backing of objective, quantitative data. Moreover, the available criteria of this type are in disagreement and are inconsistent.Significant investigations which form the basis for present standards have been made by several investigators (see Bibliography). None of these, however, taken separately or together can satisfy the needs for performance criteria.The first phase of this research project was based on the premise that a good performance test, was basic to the pursuit of criteria for (1) the design of room air supply distribution, type and arrangement of air diffusers, and (2) the design, selection, sizing, testing and maintenance of fume hoods for research laboratories or industrial laboratories.The criteria for a standard performance test were as follows:Reasonably representative of actual challenges to hoodsPractical for field use to test hoods as installed, takinginto account the effect of general room ventilation and all other "as installed" factorsPractical for shop use, for developers or manufacturers of hoodsNonhazarqousand noncontaminating for most circumstancesSufficiently inexpensive and convenient to lead to adoptionas an ASHRAE standard