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Old 01-16-2019, 09:53 PM   #1
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33AA Rear heater vent in bathroom

When we turn on the rear heat we have lots of air flow by the bed and just outside the bathroom door. Inside the bathroom the vent that comes out under the shower and beside the toilet we get very little heat.

Any thoughts? or is this something I have to live with. Normally I would use dampers in the heating ducks to restrict flow on some vents and increase in others. I doubt I have that option here.

Highways and Byways
2017 Allegro RED 33a
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Old 01-20-2019, 11:10 AM   #2
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Location: Powell River, B.C.
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Welcome to iRV2.

I don't have a Tiffin , but my coach does have a vent under the shower pan that blows cool air when the furnace is running .
Reason being, that in my coach the vent is actually a return air vent from the heat supplied to warm the coaches wet bay ; where all the holding tanks are located.
If this is not the case with your coach , then you will need to check the duct work that supplies that bathroom register , for restrictions and possible kinks or leaks where the heat can escape before it gets to the bathroom.

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 01-20-2019, 03:08 PM   #3
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Following. We have the same problem with our 2014 33AA. Iíve tried to see if the duct work is blocked but canít see enough of it to determine if itís the problem. Basically just living with it.
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Old 01-20-2019, 03:36 PM   #4
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When checking the air flow on one of our floor heaters in the galley, after removing the grille, I found the ducting was only exposed about half, the other half was blocked by the cabinet frame
2018 Allegro Bus 37AP
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heater, vent, heat

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