Hello
The footweel frontblower units came with the 930 and the 911 convertible. They are retrofitable to all 911 from 69 on. Maybe to the earlier too but then you have to close the lower heat slider.
Electricity is done via the heat switch contact and a relay. The blowers have a single inline fuse. They are not as efficient as the rear blower unit but better then nothing. The main difference is the heat flow at idle and low speeds.
Ther wight is aprox.2 kg and it is in the middle between the axles.
Grüsse
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