while cars do count as being indoors (I think) and can provide some protection from the elements, a heater or air conditioner would be really nice. obviously it would require battery power
There’s already one in game.
https://cdda-trunk.chezzo.com/mountable_heater
https://cdda-trunk.chezzo.com/large_space_heater
It’s for the heater.
https://cdda-trunk.chezzo.com/mountable_cooler
It’s for the cooler.
Happy Hunting.
I think he means they should be preinstalled in vehicles, since most come with A/C these days.