Most apartment sized AC units top out at a few kW - that's the peak power, just maintaining the already cooled apartment is going to be consuming much less powe

Most apartment sized AC units top out at a few kW - that's the peak power, just maintaining the already cooled apartment is going to be consuming much less power. A car cruising at highway speed is lconsuming something on order of 10x as much power. Given how much smaller cars are than apartments, it's an even greater difference. So to answer your question: not much. Heating in cold weather is much worse on range, as it's not just the cabin but also the battery that needs to be maintained at an adequate operational temperature.