It is also a lot about the "Mass". Keeping the temp at 60 for example will keep enough radiant heat to prevent freezing for quit sometime if the heat pump stops working. If there is going to be extended below freezing temps then some form of auxiliary heat would be prudent. Extended temps below freezing is rare in North Florida and LA.
The info below is from the operators manual.
AUX. HEATWhen in the
mode, if the outside ambient temperature
is measured to be below 30°F and the vehicle is equipped with a
furnace connected to the Comfort Control Center, the control will
automatically select the
operation and the
will shut down.
If vehicle is not equipped with a furnace no heat
will be available below 30°F. IF vehicle is equipped with a
furnace and it is connected to its own thermostat, it must be
manually turned ON and OFF for operation.
When this happens, the
on the LCD will illuminate. Once the outside ambient temperature is
measured above 38°F, the control will return to the
operation and shut down the furnace if it is connected to the Comfort
Control Center. If furnace is not connected to the Comfort Control
Center, the furnace thermostat must be manually turned off.
2014 Solera 24R