My early Nissan LEAF used a resistance heater but My 2013 LEAF had a heat pump. The heat pump was so much more efficient. When efficiency is the priority I think the Aptera would benefit from that improvement.
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Next level would be a heat pump evaporative cooler combination, that uses the heat pumps waste heat to dry desiccant that is used to de-humidify the evaporative cooling output. This will result in bulk efficiency. Water would be a consumable.
Another option is to have cooled/heated seats maybe with air assist. This is the ultimate in climate control zoning, and is more efficient as heating/cooling achieved via conduction. This would also a much smaller heat pump.
Next level would be a heat pump evaporative cooler combination, that uses the heat pumps waste heat to dry desiccant that is used to de-humidify the evaporative cooling output. This will result in bulk efficiency. Water would be a consumable.
Another option is to have cooled/heated seats maybe with air assist. This is the ultimate in climate control zoning, and is more efficient as heating/cooling achieved via conduction. This would also a much smaller heat pump.
I am pretty sure that Aptera will use a heat pump.