We traveled to the northeast a couple of weeks ago and experienced nights in the 30's . A 1500 watt electric heater maintained temps in the low 60's at night in our Vegas 24.1.
I think we used the propane furnace twice first thing on a couple of mornings to get things toasty for showers.
Temps were pretty comfortable during the days so the electric heater was maintaining an already warm coach.
The electric heater is a great supplemental heat source .
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