Energy use, miles of range, for parked use of A/C, seat heaters

[D.E.]

I've used the A/C while parked a couple of times. I find that it consumes about 6 miles of range for each hour of A/C use. That is outside temp 90+F, inside temp 70F, fan on “3”, parked in the sun.

Anyone know how much energy the front seat heaters consume in terms of range consumption per hour of use?