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It also has a heated steering wheel which has turned out to be a good option for me as I have problems with my hands getting cold. According to the My Nissan LEAF Forum the seat warmer uses a maximum of 50W per seat while the car heater uses a minimum of 250W [3] . So if there are one or two people in the car then significantly less power is used by just heating the seats and also keeping the car air cool reduces window fog.