Battery capacity running heater

+1 to furpod's suggestion to do a test run ahead of your trip if possible. Just give yourself time to recharge your battery before leaving.

You have to remember that the furnace and fan shouldn't need to be running all night long, it will cycle as often as your temp setting and the outside ambient temp dictates. Dial it down for the night and bring it up when you get up and shut it off before hitting the road again.

If you haven't done it already, open up all the access panels you can think of to look for any holes in the floor of your trailer. Our 192 had several overly large holes cut through the floor for various water lines etc. Block them off as best you can to stop the air from rushing through and making your heater work more then it might otherwise.

The main culprits were under the shower pan and just in front of the hot water tank (the panel for access is to the right when sitting on the toilet).

I quickly used gorilla tape to overlap and cover the holes to block/stop the cold/hot air from getting in as easily.

I was going to apply some spray insulation from below the floor but found that the screws holding the underbody plastic cardboard were too tight and I didn't want to wreck them taking them out.

Cheers,

Andy

 We will be leaving for Florida and will bring our Mr Buddy propane heater if it gets too cold. We will be camping at Federal campgrounds with no electrical hook up. So to conserve battery we will use the Mr Buddy heater if needed. Walmart sells the one we will be using for about $75.00 and $10.00 for two propane bottles, we will bring four of the 1 Lb bottles with us. We just bought a new battery so hoping to take good care of it and to not discharge it too much. Northern Tool has the heaters on sale for $68.00.That's less than having to buy a new battery.

If you have a healthy fully charged battery then you should be  get through the night ok. The furnace uses about 3 amps IIRC. So in 8 hours that's 24 amp hours, 1/4 of the typical RV 100 amp hour battery's capacity. And that's assuming the heater is running continuously. In reality it will be at a duty cycle of probably half that or less. Just don't run any other significant 12V loads the evening before so you're starting  full charged. A couple of LED lights for an hour or two is fine.