We also have 30 amp and have 2 electric heaters. One has a fan to move the hot air around and the second is a radiator style for when it's to cold for just one heater. So far I haven't had any problems. This year I am going to also add a small fan that will be pointed at the ceiling to move the hot air around that it trapped up there. I look more at how many amps the heaters use and not just their watts (I may be wrong about that).
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Dave, U.S.A.F. (Ret)
2019 Fleetwood Discovery LXE 40M (Big D)
2016 Ford Focus, flat tow
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