Originally Posted by trucking
My wife and I are planning a vacation this month September where The Night time Temperature is forecast to be 30-36 degrees a Couple of nights...
If your basement has the cut-outs for the ducted furnace as others have mentioned, and you're only going to be in the low 30s, I'd say you'll probably be ok with the furnace going.
Now, what I used to do when connected to full hookups (shore power) is the following:
Power is included with my campground fee, whereas I have to buy propane.
So I rarely ever ran my furnace in cold weather. What I did is something like what you mentioned in your previous post in re an underbelly heater. I got a couple of these electric fan-fed ceramic heaters:
They're relatively cheap ($40-$75), and can be picked up from almost any hardware store, Walmart, or ordered on Amazon. They have a thermostat control, and a tip-over safety cut-off.
I used one inside my living area because... again, free electricity from the campground is cheaper than me buying propane for the furnace. Duh! At night when the temps dipped, I opened all of my kitchen cabinet doors & drawers near the floor so the warm air could filter in to water plumbing was located just under them.
And I also did the following for my basement:
I cut a hole in the wall down there, and placed one of the heaters so that it would blow hot air directly into basement... my pipes were constantly kept warm all night long.
Now again, the lowest temps I ever found myself in were the high 20s (27, by my thermometer)... and I never had any issues.
One other thing you may wanna consider picking up is a heater water hose from the campground spigot to your rig. It's out there in the open, with nothing to keep it from freezing... and you don't want a surprise immediately following that 2AM bathroom visit, or when you go to take that early morning shower... only to discover that you have no water because your outside hose is frozen.