Winter use??

Deb and Ed M wrote:
In sub-freezing weather, we used our Class C all the time. We flushed the toilet after use with antifreeze*; and used bottled water for toothbrushing, etc; followed by a splash of antifreeze down the drain (left the freshwater system winterized)

This is what we do for the first few days getting from New England to Florida in January when the temps often are around 20 degrees in the morning.

Those heating devices appear to be geared towards heating waste tanks and drain lines, not fresh water. I think there is an implied assumption that the fresh water tank is inside the coach, which is not true in my situation but may work well for the OP.

Dave