Gas fireplace service work carries real, unforgiving stakes: a mistake here can mean an explosion, a fire, or a slow carbon monoxide poisoning that a family doesn’t notice until it’s serious. This course goes deeper than general fireplace service training specifically because gas work demands it — real manifold pressure ranges, the actual mechanics of a redundant combination valve, the specific gravity difference between natural gas and propane that changes how each one behaves when it leaks, and a genuine testing and troubleshooting methodology built on instruments, not assumptions.

This is not a substitute for the licensing, apprenticeship hours, and supervised fieldwork that gas work legally requires in essentially every jurisdiction. It is preparation for that path — the technical foundation a serious NFI or CSIA-track student needs before stepping into supervised gas work, built to the depth that work actually demands.