| The different gases require different orifices and possibly regulators (if the house pressure isn't what's spec'd for the particular grill and gas). When you change orifices you also often have to adjust the flame via the shutters. Lynx I know requires changing orifices. Fire magic may not, but I would ask them what is involved in switching between gases. Cooking products which work off both gases without orifice changes will not perform identically both gases. If you're mechanically inclined and comfortable with this sort of work, it might not be too bad. Note that the conversion kits typically cost $60-200, depending on whether the hose and regulator are included or not. Personally, after having a grill that't connected to the house supply we would never go back to a portable LP tank. Michelle | 
