Packard Forum Index » Pre-War (1899-1942)

I knew at what time the purpose of this extremely rare option, but now I've forgotten. Can anyone enlighten me on its purpose, and how it works and/or how it's supposed to be plumbed under the dash?

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There was a heater fresh air option for prewar cars and I am wondering if that could be the conventional body implementation.

On the Clippers it was a solid round duct running straight from the firewall to an opening in front behind the grill. With conventional bodies I think the grill and engine side area may have been too narrow for the solid duct. It could have come from the vent thru something like a small defroster type hose.

There was a knob which worked a cable to open a small door or maybe the small vent to allow air thru the duct to enter the heater cavity and be circulated.

I believe Jim Hollingsworth had a car that had this option. I wonder if it is described in his book on the 1940 model?