A through study of the residential high pressure gun type oil burner. Topics covered include: basic combustion theory, how the components of high pressure gun type burners operate, choosing replacement parts, mechanical troubleshooting, oil tank installation, advanced combustion theory, and steady state efficiency testing. Students must be simultaneously enrolled in HVAC115M. It is recommended that students have successfully completed or are simultaneously enrolled in HVAC101M, HVAC109M and HVAC110M.