What automobile had the first heating system for the interior of the car?
The vintage cars must have been very cold to drive during the winter. What year and what automobile had the first heating system to keep the passengers warm? I can’t find anything on the Internet.

The 1928-1931 Ford had an optional heater .It consisted of a cast iron funnel that fit over the exhaust manifold . This funnel mated to a hole in the firewall that went through into the passenger compartment. Air from the engine fan was blown into the funnel , over the exhaust manifold, where it was heated , and into the car. The amount of air was controlled by a damper inside the car. In the summer you just lifted it off of the motor,it wasn’t fastened down. It worked quite well.
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1950′s is when heater started becoming standard. As to the first mfg to do it. I am guessing packard or a american car mfg. Yet I see what you mean on it’s not on any search.