SCVJeff wrote:
There's not really enough data to answer the question. Those owning the same RV can likely answer better but it totally depends on outside temp, inside air temp, AND how long it's been at 32degrees (+coach construction, etc.). If you've left it long enough it's going to take at least an hour to warm up the entire interior (different from just air temp) to the point that the heater doesn't continuously cycle from the entire RV being cold soaked.
I think SCVJeff raises a couple good points here. Keep in mind that it's not just about heating the air inside the RV, but how long it takes for RV itself to absorb heat energy from the newly-warmed air. I would be curious as to how long it would take for a 0* RV to reach room temperature if pulled into a consistently room temperature garage or shop bay. That answer has more to do with the materials' ability to absorb heat, and less to do with the capability of the furnace.
