Wife and I traded rigs in February while in Az. Bought a used 05 Monaco w/ Aqua Hot diesel furnace and water heater. It kept the tile floors warm and the water bay heated. The burner sounded loud when running until I stood next to propane furnace in next door fifth wheel, not that much louder. Total change from the two zone propane furnaces and propane/electric water heater in old rig. Like most people, I wasn't taken in by all the sales pitch when looking at this rig. This time it was all the sales man said it would be. Blind luck and a nice rig.