I’ve wondered about the same thing. Back in mid 1970’s, there was a plug-in car called a Citicar. It used a propane heater for heating and defrosting. As I remember, the heater was not vented, so the windshield would fog up pretty quickly.
I’ve wondered about the same thing. Back in mid 1970’s, there was a plug-in car called a Citicar. It used a propane heater for heating and defrosting. As I remember, the heater was not vented, so the windshield would fog up pretty quickly.