System works better with propane and electric both on especially if itís that cold outside. Ensure you also have electric 2 on priority if youíre on 50amp service.
For temp differences, they will always exist in all trailers. Alde gets it within 5 degrees. You can try and set up a fan to move the air a little more or use your heat pump only in your room? Heat pump will not work below 40 I believe though.
Usually I hear that the bathroom is cooler in the 33 because the towel bar is at the end of the loop where the towel bar in the 30 is near the beginning of the loop.
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