My son is driving his 1970's Porsche 911 first time in the Finnish winter. He soon realized the short-comings in inside heating of a air-cooled car.
So he ventured out to build a battery-driven portable heater. The loaded batteries will power the heater for 20 minutes at 1000W and 30 minutes at 600W. Makes the winter-driving more comfortable and more safe.
I haven't taken my Karmann Ghia for a winter drive, yet. But if I need a heater, now I know from where to get drawings and instructions.
