heat in the lower storage bay

For my last motorhome I purchased two 200 watt heaters and two thermocube that plug into an outlet and automatically turn on at 40 degrees and off again when the temp rises. They kept the storage compartments warm enough so nothing froze.

Itching2go wrote:
I've done this as a supplement to the furnace over night when the temperatures are particularly cold, but I don't believe it would be sufficient in and of itself to keep things from freezing up without the furnace. .

x2. If you can even find an incan bulb anymore. It's barely a help at all. Now, a big ol' heat lamp may work. Of course that would require more electricity and you'd have to pay for it.

What contents are you concerned about?

Putting a light bulb in the storage area will definitely help keep the plumbing warm, but the key word here is 'help'. I've done this as a supplement to the furnace over night when the temperatures are particularly cold, but I don't believe it would be sufficient in and of itself to keep things from freezing up without the furnace. I suppose it all depends on how cold it gets, though.