Combustion analysis is the measurement of a combustion systems flue gases to determine the completeness (efficiency) of the combustion process. Combustion analysis is only the first step in maximizing fuel efficiency. An HVACR service technician must understand the Air/Fuel ratio, and venting adjustments necessary to accomplish efficiency. Several companies manufacture combustion analysis test instruments, including, Fieldpiece, Bacharach, and Testo. Combustion analysis requires more than tools, it requires knowledge of the combustion process and how to use the instruments. To make certain that the HVACR service technician is properly trained in Combustion analysis, renowned trainer and author Erik Rasmussen has written a new training manual titled “Combustion Analysis & Fuel Efficiency”.