Going thru my (new to me) 99 Conquest class c, I found a broken flex duct connector collar to the floor duct UNDER THE KITCHEN SINK. Might want to pull the drawers to inspect (plastic release button under each drawer bottom center)... (also found/ pulled out store bags, trash bags, kitchen knives and utensils)... guessing they bounced over the tops of the drawers, (either while traveling or opening/ closing). (STILL on my list of items to fix
,,, but should be a simple, cheap fix w/ new collar... just have not measured diameter yet...