I have oil in my house. I have noticed that the price of oil fluctuates alot and is quite a bit more expensive to heat with than natural gas, right now. Is it possible to get an gas burner installed but to be able to switch between the gas furnace or the oil furnace back and forth? I have hot water radiators and a few floors heated with radiant. I already have a gas line into my home. Is it price prohibitive to get this arrainged?