Class A Fulltimer freeze concerns

Newmars are well insulated; as long as you use your furnace you should have no problems.

I never have had frozen water lines. If I am in a freezing area for any great period I put a heat tape on the waterline from the spigot up to the motorhome.You may call me if you have any questions. Be happy to share with you.

It's good to keep a watchful eye on low temps. I'll also reiterate that Newmar's are so well insulated it shouldn't be an issue. For your own piece of mind why not get a wireless thermometer, place in basement, & you can see for yourself how warm it is staying.

Within the motorhome, there shouldn't be problems, as others have said.

You do need to disconnect the water supply hose in freezing weather lest the water spigot and the water inlet freeze and split. (Most hoses are flexible enough to withstand freezing water in the hose proper, but brass and plastic fittings have rather less give.) There are heated hoses etc. to work around this, but I don't think they'd be worth it for you when you won't be spending a good deal of time in freezing conditions.

It wouldn't hurt to stow the sewer hose as well in freezing conditions.

If really want to be safe, go to tractor supply and buy a freeze cube. They plug in a electrical socket and at 35 degrees they will turn on a heater and off at and 45 degrees. Used for animal water tanks. Go to walmart and purchase a 400 watt personal heater. Put this in your wet bay and worries are over.

At night you might not run the furnace enough to keep the bays warm. Getting a remote thermometer is great advice and you can adjust you bay heat as necessary. A couple of light bulbs, small personal heater(s), heat mats, freeze cubes can all be added as necessary to keep everything underneath warm. Much depends upon "how cold and how long". We long term in very cold weather at times without issue but it does take some interaction on your part.

How cold is cold? While in use most any RV is good to about 25. If yours is well made as said above you are probably fine to at least 20 and maybe lower.

We use a 200w heater with large electric extension cable, from entertainment bay and a TC-3 Cold Weather Thermo Cube Thermostatically Controlled Outlet (in the wet bay).

Don't forget to protect the fridge. See the thread in full time called winter camping.

I use a thermocube on my fridge with a 60 watt light bulb. I also restrict the air flow by blocking some of the vents.

I use a 600 watt heater on a mechanical thermostat to keep the waste tanks unfrozen.

Replace the return air grill with twin window fans. I use a 2nd mechanical thermostat to operate the fans. They pressurize the duct work and keep the water lines from freezing up.

Currently at Norton Pond Vt. temp is 15 with a low of 5 tonight, love camping in the cold.