What year 911's had heater system without electric blower?

[Gordo2]

Seeing a few cars being parted out on the classified section but not sure what year cars have the older style heater system with pieces required to "back date" my '83 heater.

Searched the BBS but all I could find was "older". What year did the electric motor start to come into play on the heating system...


Thanks, Gordo

[ruf-porsche]

Had a 74 coupe that didn't have a electric motor.

Now have a 82 Targa that does have a electric motor which was replace last year.

Even though the car is store from October to April I still start the engine in the winter to run it, and it gets cold just sitting in the car.

[david lipman]

my '77 does have the electric motor. Should help narrow this down.