dand22@sbcglobal.net
i don't think so because you can buy a grill that can be hooked up to either natural gas or propane. I did years ago and only needed to buy a conversion kit. it is my understanding that propane gets hotter than natural gas does.check and see if sears or charbroil websites have any info (theysell both types)

norm
No they are the same. If there is an adjustable shutter on the end you open it more for propane and less for natural gar. You open it until the yellow disappears from the flame tips. If the flames blow away from the burner body when you light the grill cold you need to close the air off a little bit.

oil field trash
Propane has more atoms per molecule and therefore more heat. It takes more oxygen to fully burn propane and that is the reason for having to open up the air register to get rid of the yellow flame.