Really any fire can be used to heat glass. The bigger the torch the hotter the flame to a point. Eventually, each fule can only reach a max temperature, but any fuel such as butane, propane, MAP gas or even asetilen can be used. Asetilen is a dirty fuel used mostly in welding in a bad environment like when a building is coming out of the ground.
NEVER HEAT borosilicate glass past 1000 as it will un aneal it, and never ever get it red hot. Red hot is beyond 1000.
Check out how to use a banger blog for more info