steveh27 wrote:
My Class B has the same setup with the fresh water tank and pump under the bed. So it is inside, but because the space is sealed from the heater outlets it does not get direct heat. That did cause a problem when it was 8 degrees and the lines from the pump to the tank froze. I lifted the bed to allow air in and put a few chemical hand warmers on the affected areas. It was good after a few hours as the day warmed a bit.
But it is not a problem with the temps you expect.
Good place for a small pipe heater. (assuming you are plugged in)
https://www.ultraheat.com/ultraheat-am-ph513