I believe the Kia Soul EV can restrict heating to the driver's side to save energy and thus increase range. Would this strategy work for a Model S or would the cooler air coming in the passenger side eat up the energy savings? The Soul probably shuts off the outside air to the passenger side to achieve the energy savings. Has anyone tested this on an MS? I guess if one set the HVAC system to recirc this strategy could work but would probably result in fogging of the windows. With only the driver aboard, this might work with a regular application of windshield defrost. Has anyone experimented with this? Results? - - - Updated - - - Perhaps the recirc technique would require manual selection of A/C to off? Any Tesla techies out there know how the HVAC maintains different temperature for passenger and driver?