Since I have the option of where to mount my furnace when I get to that stage, I'm aware that when winter camping the lines can freeze up. Lots of good discussion here before.
I am most intrigued by the ideas of:
1) a small 5w pad heater under the tank
2) blowing the air at the lines
The latter would be easy to arrange since I am still in the building cabinets and layout / design stage, and will be using a Propex 2000 heater for size and placement advantages.
Question, would the heater output if blown directly at the water tank lines be hot enough to have to worry about melting them?