Dometic makes an AC/heat pump but it only works down to 40 degrees F. Then you heed a heat strip or a furnace.
The biggest drawback will be the lack of tank heat. The furnace blows hot air around the weather and holding tanks. Without the heat they will freeze if you are camping in freezing weather.
It all depends on when and what the weather is when you camp to say if it is enough to have a heat pump only.
WBCCI #5501 AIR # 49
1978 Argosy 28 foot Motorhome
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