Result:

What most people have done when switching to this style water heater is just simply mount it right next to their current water heater in the compartment so that they don't have to run the water and gas lines as far. If this isn't a feasible option then you could just replace the Atwood unit you have with the Furrion RV Tankless Water Heater # FR98SR. |

Can this be mounted on the outside wall of my RV and piped into the existing water supply? Basically, remove old 6 gallon water heater and hang this over the hole, plumb in the gas and water using existing lines?...

It will still do a good job in an RV, I just think there is a better option. I recommend the Fogatti tankless water heater, it vents outside and can produce 90 gallons of hot water an hour. it is a very easy install that will use current fittings and lines. |

The only way to get the unit out of frost protection mode would be to warm the pipes back up to an acceptable level and then pull the fuse located under the on/off switch on the unit for a few minutes to allow the control panel to fully reset. |