supplier can help you, if you know the type of gas and the btus needed there are charts that will tell you the correct orifice size...Propane suppliers with service depts have the charts as will as the needed orifice styles...You did not say if you need the pilot or burner orifice...or the model number of your furnace.
I can send the charts if there are none in your area.
Hi Everyone. Does anyone have or know where I can get an orifice for a 1978 Coleman furnace? It's out of a 1978 Trillium Jubilee. Thanks Tim R