Unless things have changed in the industry (or with RV heat pumps) the actual heat pumping function only works down to around 32 degrees. Below that "emergency heat strips" kick in to supply the heat, as there's not enough heat in the outside air to pump in.
My ex FIL used to do what he called "wham bang"ing his system, making the heat strips kick in full time. Higher power bill? Yep, but he wanted *hot* air coming out of those vents all the time.
It was pretty common for dealers to not recommend heat pump systems for the elderly because unlike a gas heating system, the air is not really very hot out of the vents.
Heat pumps weren't recommended in areas of harsh cold temps for the reasons stated above.
If age is a state of mind, and I've lost my mind, I'm AGELESS, right?
Give me 40 acres and I'll turn this rig around:
Flagstaff 5er 2014 8528 IKWS
, Platinum Package, Regency Interior "Buffy"
F250 Super Duty 2013
Tuxedo Black "Biff"
Days camped 2014