This is the Acronym for AWG

These are terminals or contacts that do not contain voltage

This is the reason for the code that prevents drainage of a either a AC or 90% gas furnace from draining into a public sewer

This the number of fittings that we bubble test prior to where we adapt our gas line

This component follows the filter in order from oil tank to burner

This is the distance combustible materials must be away from B-Vent