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Old 03-17-2012, 08:11 PM   #1
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Furnace blows hard in rear, soft up front

I have a 2010 Wildcat 29BH fifth wheel (rear bunks). The furnace blows extremely hot air with fairly strong force in the rear of the coach (where the bunks are). The living quarters' vent isn't so strong and the vent in the master suite (above the king pin) barely blows any air at all.

Has anyone experienced this. Obviously it isn't an issue with the furnace itself as it is working really well to the rear.

Any ideas on how to correct this, or make the air hotter in the master suite? Thanks

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Old 03-17-2012, 08:24 PM   #2
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I'm assuming that the furnace is also located at the rear of the camper. The air velocity will be the highest closet to the furnace (path of least resistance). One of the few things you can do is to restrict the flow at bit on the outlets closest to the furnace to force more flow towards the front. You should also check up front to ensure that the flexible ducting is properly connected and not leaking.

We also run the ceiling fan to help distribute the heat.



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Old 03-18-2012, 12:52 PM   #3
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You have to remember that as the heated air from the furnace travels through the trailer’s duct work it becomes more and more dispersed. Your holding tanks in the belly of the trailer are heated by ambient air from the furnace and your front storage compartment should have some of the heat going into it also. By the time it gets back up to the last vent in the front bedroom room there’s not much left.

Unless your front bedroom is uncomfortably cold I would leave well enough alone. You might also consider a small space heater for the front bedroom. I have found that by cracking the front ceiling vent just a bit, air circulates through the trailer much better. Hot air rises, so with better circulation heat moves up to the higher bedroom more quickly.

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Old 03-18-2012, 02:19 PM   #4
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New 2012 Sabre 31 RETS-6, first trip out last week. I find the same problem with the heat in the bedroom. You can hardly feel any air coming from the bedroom register. I even put tape over the register in the basement but it didn't do much. This is my third 5th. wheel in 4 years and all the others worked much better. The register in the living room and the one in the kitchen (which is only a couple of feet from the furnace) blow a nice volume of heated air but the register in the bathroom and bedroom, very little. I will let the dealer look at it before fall.
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Old 03-18-2012, 06:32 PM   #5
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You might want to open the front of the furnace and take a look at the plenum, mine had dropped. I pulled the ductwork up and reattached it. I also made a sleeve to cover the exposed wood. I also blocked off a portion of the vent dumping into the belly as there is no ductwork attached to it and it will take the most air. Caution: Before blocking anything or throttling your vents down, look at the paperwork for the furnace and they should list a minimum number of ducts needed to operate the furnace safely.
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Old 03-18-2012, 06:42 PM   #6
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I replaced the rear floor vent with a vent that I'm able to close. Also the one in the living area. With just that we're able to get much more hot air to the front of the rig. It makes a lot of difference.
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Old 03-19-2012, 04:10 PM   #7
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Thanks for all of the advice. I'll spend next weekend looking into this. I can't help but think I have a duct-work issue so I'll check there and probably block off a portion of the register in the rear room.
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Old 03-20-2012, 09:35 PM   #8
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Yes my TT had the same issue! my rear bunk bedroom would roast!!! I limited the amount of airflow by putting a piece of aluminum facia under the vent. I decreased the vent opening by 70%. now the trailer heats up properly and there are no hot spots in the trailer.
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Old 06-15-2012, 10:13 PM   #9
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take pics

We have the same problem. All the heat is in the front bedroom and hardly any heat out of the other vents. I removed vent covers, with a flash light and cell phone camera I took pictures of the inside of the ducts to find out the duct work was completely collapsed. Which was restricting the airflow except for one vent. I'm still trying to find out what to do to fix it but not having much luck with the service company.
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Old 06-15-2012, 10:17 PM   #10
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We had the dealer take off and close up heat to the underbelly then they installed adjustable registers in bunk house and main living area.

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