when i put heater on my predicted range drops by 40/ 50 miles instantly, but goes back up when you switch it off again, so i dont think using it is particularly as wasteful as with ice vehicles. electric seat and steering wheel dont affect range at all oddly.
apparently the most efficient way to stay warm is by using the heated seats as they’re in contact with the body.
Current car 2022 Hyundai Kona premium in Jungle green.