Why is it crucial to keep combustible materials away from gas fittings?

Keeping combustible materials away from gas fittings is crucial primarily to prevent potential fire hazards. Gas fittings are associated with the distribution and usage of flammable gases, such as natural gas or propane. When combustible materials, like paper, wood, or cloth, are in close proximity to these fittings, there is an increased risk of ignition, especially if there is a leak or malfunction. Heat generated by the fittings or nearby equipment can also ignite these materials, leading to dangerous fire incidents.

While other options touch on aspects of gas systems, they do not address the core safety concern. Better gas circulation isn't directly related to the presence of combustible materials, and compliance with consumer preferences or cost reductions does not prioritize safety, which is paramount in any installation involving flammable substances. Therefore, the focus on preventing fire hazards is the critical reasoning behind the need to keep such materials at a safe distance from gas fittings.