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Old 01-07-2016, 04:38 AM   #1
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rockwood 8289 underfloor heating

Hi all,
we now have reason to use the heater more often, and have noticed the vent in the shower is very powerful and then the other 3 get gradually weaker, the further they are away from the furnace, is this normal? It seems odd that the space that needs most heat (living area) gets the least. Is there a way to remedy this, or is it just bad design?
Peter
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Old 01-07-2016, 06:14 AM   #2
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It is just plain bad design, your bath is probably the shortest run on it's own, then they just run a duct branching off. If you can trace the duct to the plenum and blank off 50% of that line you can get more air back where you want it
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Old 01-07-2016, 06:32 AM   #3
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Thanks for the quick reply
the furnace has 4 ducts attached to it and I am presuming they all come from the same source internally so if I cover the bathroom vent wil this divert more air to the living area without causing overheating of the furnace?
Peter
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Old 01-07-2016, 07:36 AM   #4
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If there's room, try switch'n hoses around on furnace....sides have less flow that the 2 in line with furnace
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Old 01-07-2016, 07:52 AM   #5
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Can you find somewhere that you can get to the ducts, which I assume are 4" flex, to install one of these in the one going to bathroom. Ideally one of these on all 4 ducts and you could custom balance everything.

Master Flow 4 in. Inline Damper-ILD4 - The Home Depot

The furnace will have a high limit, so it would cut off if you restrict it too much. Think of it this way. They probably use that exact same furnace for different rigs and only use 1 or 2 of the duct taps.
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Old 01-07-2016, 07:54 AM   #6
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Thanks Bob, Good tip I will see if that is possible, doesn't look like there is room but I need to remove all the junk from the locker first to check for sure.
Peter
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Old 01-07-2016, 07:59 AM   #7
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Thanks Mr Havercamp also,
I am in England, but I am sure we have a similar device over here so after I get to the furnace, that will be another thing to try, if I can't switch the ducts around.
Peter
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Old 01-07-2016, 08:31 AM   #8
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We just happened to have a heavy, memory foam-type bathroom floor mat. I noticed we were getting tons of extra air in the bathroom diffuser, so I scooted the mat over a little so it covered the diffuser and it is heavy enough to completely block the air. It made a marked improvement on the flow of the other diffusers in the camper.

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Old 01-07-2016, 08:38 AM   #9
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When we had the Heat Flow problem I used a Heavy Trailer Life Directory to cover part of the Bathroom heat register,Boy I sure miss reading that after the New Duct was installed to the Rear of unit! Youroo!!
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Old 01-07-2016, 08:38 AM   #10
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Can also tie a ribbon on registers to check air flow
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