I have a 2016 ACE 29.4. I have the same vent behind the drivers seat. I get very little warm air out of it.. I also have a vent with very little warm air in the bathroom. 95% of the warm air comes out of the bedroom vent and the vent between the stove and refrigerator. The furnace blower just won't push the air that far. I use a small electric heater in the front of the coach.
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