[RMcNeal]

I have a 2019 model with the older style heat pump as well. I have found that I can use the heat pump with temps down into the low 30's to upper 20's with supplemental heat inside the coach. I use the fireplace and ceramic space heaters to provide the supplemental heat. The heat pump at that point just circulates the warmer air provided by the ceramic heaters but it does provide enough warmth to keep it in the mid to low 60's inside.
Without this additional heat, the heat pump would freeze up.