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Old 01-22-2018, 08:10 AM   #1
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Adjust air flow for Furnace output

Best I can tell is the furnace in my 2014 white hawk has one flex hose going thru the wall to feed a wall vent in the bedroom AND another that goes into the floor ducts in the main cabin. On a trip south a couple weeks ago, discovered that with the furnace as our only heat source, the bedroom was many degrees higher than the main room. The airflow from the bedroom outlet was robust while the flow from the floor ducts was minimal. With 2 floor registers and one or more holes in the bottom of the duct to send heat down to warm the tanks underneath, I suspect that the flow from the furnace is the same as in the bedroom but is spread over many more output points thus the air flow from the floor registers is low.

Has anyone found a way to restrict some of the flow going to the bedroom so that more will be pushed out to the floor registers? The wall outlet in the bedroom can be rotated to direct air in any directions, but there is not way to close or restrict the flow. I stuffed a towel in front of the bedroom outlet and that seemed to help. Wanting to replace the oem round bedroom outlet with something similar that can be adjusted.
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Old 01-22-2018, 08:33 AM   #2
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Lots of adjustable round vents out there, not sure of the size you need but here is a link to one at etrailer. https://www.etrailer.com/RV-Vents-an...10-3351VP.html
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Old 01-22-2018, 09:54 AM   #3
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Lots of adjustable round vents out there, not sure of the size you need but here is a link to one at etrailer. https://www.etrailer.com/RV-Vents-an...10-3351VP.html
yup.. you can also get floor registers that are adjustable.
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Old 01-22-2018, 10:30 AM   #4
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While waiting for the adjustable vents you could just cover part of the vent that is supplying too much heat. This would cause more air to flow into the vents that are fully open. Just as in a home you need to balance your system to get the correct airflow.

Good Luck.
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Old 01-22-2018, 03:11 PM   #5
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Thanks, will be looking at the adjustable vents
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Old 01-22-2018, 05:06 PM   #6
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Bassdogs, be sure to check if the problem vent has no kinks or is flattened. There has to be a balance in pressure and return air for the furnace to work proper and not kicking out often on high limit.
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Old 01-24-2018, 05:15 PM   #7
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One thing that helped me with this same type of issue was to call Jayco and get the drawing that shows the path of the heating ducts. It allowed me to narrow down where the kink might be.
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Old 01-24-2018, 06:04 PM   #8
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I have had this issue in my bathroom in both my trailers, too much heat in a small space. It will roast you in there lol. So I leave the doors open so heat comes out into the other rooms . It also has an AC duct which is not needed IMO.
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Old 01-25-2018, 07:02 AM   #9
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My adjustable flow replacement vent is scheduled to be delivered today and it should be installed by dark since it is and easy swap with the OEM vent. It will allow me to reduce or completely shut off heat to the bedroom as needed. I will also be checking out the hose feeding the underfloor duct and use a mirror to inspect the duct. To do this, I will place a light in the farthest opening and looking with the mirror from the one closest to the furnace. The hose feeding the floor ducts is visable in the furnace enclosure under the panty / water heater cabinet. I am suspecting that the problem will be fixed with the new adjustable vent in the bedroom.
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Old 01-25-2018, 08:34 AM   #10
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I have had this issue in my bathroom in both my trailers, too much heat in a small space. It will roast you in there lol. So I leave the doors open so heat comes out into the other rooms . It also has an AC duct which is not needed IMO.
Good point. I leave all the doors open too when running the furnace (or AC for that matter). It seems to help the temp equalize throughout the rig.
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