The testing of boilers is of crucial importance to those who manufacture and install them and also to those who own and operate them. This is due to the quest for the highest possible thermal efficiency as a means of reducing energy costs. This book offers general information on the testing of boilers, and contains information on the development of fundamentals and simplified test formulae. Attention is also drawn to points that are controversial or subject to alternative treatment and there is general information on fuel instrumentation. The text is aimed primarily at British readers, but the ASME standard is also considered. It should also be useful to students of fuel technology.