I have a 2017 Bolt, resistive heater no heat pump. I take a -minimum- of 25% range hit in the winter (midwest, garaged but frequent long drives in sub-freezing temperatures) with minimal usage of heat. I've trialed no-heater days, but most of the time I only run a low level for window defogging.
I have a 150 mile round-trip commute when I need to go in to the office. My "summer range" (really more "not-winter range") is 240+ miles. I stick to posted speed limits for efficiency, 60-65 MPH. This winter I've been getting back home with 30 miles of range to spare. I haven't done the math or recall what power draw my gauge cluster reports when I toggle heat on/off, but I do remember it reduces my range estimate by ~5 miles when I turn the heat on.
I have a 150 mile round-trip commute when I need to go in to the office. My "summer range" (really more "not-winter range") is 240+ miles. I stick to posted speed limits for efficiency, 60-65 MPH. This winter I've been getting back home with 30 miles of range to spare. I haven't done the math or recall what power draw my gauge cluster reports when I toggle heat on/off, but I do remember it reduces my range estimate by ~5 miles when I turn the heat on.