Many RV manufacturers have been installing fake fireplaces in their RV floor plans. These are really nice for atmosphere and they actually give off heat.
They also take up space that could be used for storage and most folks don't use them much. Another drawback is they use a lot of propane gas but so does your furnace. (If they are the electric models they also draw a lot of electricity - hat tip to the folks contributing in the comments section).
When you're buying an RV the manufacturers are selling you a dream. They're promoting an idea of home and hearth, warmth and romance, luxury and leisure. The fake fireplace helps to sell these units otherwise they wouldn't include them. If you want the fun of the fake fireplace, then by all means, pick one of these units.
If you want efficient cost effective heat then have a catalytic heater installed instead.
These units will warm your RV much more efficiently and be more cost effective though less romantic. We had these fake fireplaces in our last two stick houses and only used them three or four times. Those of you who have these units in your RV's please tell us if you think they are worth having. Tell us what you think by clicking on the light blue "comments" section below. Helping you get the right options in your next RV - Jim Twamley, Professor of RVing