In the primitive days of America, skilled trappers depended on subtle signals in the earth to show them signs of the wild game they needed to survive. A single footprint often was enough information for a skilled trapper to be successful.
The situation does not differ much when it comes to staying alive while operating your combustion equipment. The equipment will sometimes give you signals you must understand to stay alive. Sometimes, the messages are subtle, and sometimes, they are not, but how discernable they are usually has a lot to do with the skills of the person who is looking and listening. This article is intended to sharpen your hazard-recognition skills in a few key areas so that safety issues related to explosion relief of gas-fired equipment are no longer subtle.