428 viewsHere the flapper is opened all of the way so all of the heated air goes into the Bus interior. This system is used by all the Types of engines (Type I/II, III, & IV).
426 viewsFlap fully open, allowing some of the heated air to divert into the center of the Bus for the rear passengers.
409 views
374 viewsLeft heat exchanger accordion duct, looking forward. For some reason, the diameter was more than 16" so the wrap didn't fully cover it.
Most viewed - Bus duct insulation
