随着人们意识到许多传统能源供应确实有限，人们越来越重视认真有效的能源消费。节能技术备受关注的一个具体领域是工业通风。虽然减少通风和排气系统的容量可以降低能源需求，但这些系统必须满足严格的健康和安全要求。因此，重新评估设计标准的方法可以减少工业通风的能源使用，同时最大限度地提高系统的可靠性，以满足强制性健康标准。 本研究项目是对工业排气系统退化的调查，旨在证实Dorgan和Ermer开发的退化可靠性模型。该项目的实验部分旨在建立一个数据库，将系统静压和流量与长期退化联系起来。由于使用封闭系统的基本概念是新的，因此根据需要对仪器进行维护和更新，以确保数据的可靠性是另一个目标。数据的收集和分析旨在确定两个排气系统的降解模式。

With the realization that many traditional energy supplies are truly limited, more and more emphasis is being placed upon conscientious and efficient energy consumption. One specific area where energy conservation techniques are of great concern is industrial ventilation. While reductions in ventilation and exhaust system capacities could reduce energy requirements, these systems must meet stringent health and safety requirements. Therefore, the approach of design-criteria re-evaluation promises reductions in energy usage in industrial ventilation, while maximizing the reliability of the system to meet mandated health standards.This research project was an investigation into the degradation of an industrial exhaust system in an effort to substantiate the degradation reliability model developed by Dorgan and Ermer. The experimental part of the project was designed to establish a data base relating system static pressures and flow rate to long term degradation. Since the basic concept of utilizing a closed system was new, instrumentation maintenance and updating as required to insure data reliability was an additional objective. The collection and analysis of the data was directed toward determining degradation patterns of two exhaust systems.