This title examines the effective design of exhaust hoods for local exhaust systems and notes the increasing importance of effective hood design as concerns air pollution and operating costs. While some research has cast doubt on the accuracy of some of the contemporary design equations, this book offers revised design equations, which experimental evidence shows are more accurate and consistent than those in use in the 21st century. The equations are for a range of exhaust hoods using the layout of table B3.5 in the CIBS Guide. Further tables present guidance on the selection of control velocities for pollution capture, the heat transfer rates required for assessing the performance of canopies over hot sources and the effects that side walls and adjacent surfaces have on hood performance. The book also provides general design hints and discusses the background to the design information in an appendix.