I have an auxiliary heater in my '94 CDN 90 that is under the passenger seat with ducting through the battery box and up through the rear floor just behind the passenger seat. I am not sure which other vehicles have this set up, but I see little reference in the forum. It looks like someone used an aluminum dryer duct for the ducting in the past. I assume this is not stock.
Does anyone know what these looked like stock and any idea about a source for replacement.