I use my rv year round. I have traveled in freezing (and below freezing) weather. However, when we stop for the night or any length of stay, we use our furnace and electric fireplace. I do not have the furnace on while on the road.
Glen and Karen
2013 Eagle Premier 321 RLTS
2008 Ford F350 Lariat 4X4 6.4 Powerstroke
"Hannah" and "Jasper" our tagalong poms