The gas furnace in our 2006 RT is noisey also, and there is nothing wrong with the furnace. The blower just makes noise that when in a small area like a B has will seem even louder. We did purchase a ceramic electric heater that we use when hooked up to shore power, it it is so quiet that we love it. But when boondocking in the cold weather, the gas is the only show in town. The noise is still better than freezing. Happy travelin!