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10-26-2021, 02:37 PM #1
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Reflection 28bh Fifth Wheel Furnace Questions
Hello! Thanks for reading. We have had trailers for 10 years, but are new to fifth wheels this year. Our 28bh is set up like most bunkhouses, with the bunkroom at the back and the master front. We have a huge 2"x10" heat duct in our bedroom, and then the long run to the bunkroom with only a 4" line. Needless to say, with the heat set to 68, it is 68 in the stairwell where the thermostat is, 82 in our bedroom, and 60 or so in the bunkroom. We found that by covering our bedroom vent, and setting the thermostat high, we can force more air into the bunkroom, but it uses a ton of propane. I have also read that it's not a great idea to block rv heat vents? The heat that our furnace produces is incredible....I first bought a standard residential heat register with metal top and plastic part that closes off the register, and the entire plastic part melted into a twisted mess. It didn't become liquid, but boy it is twisted now! SO....any thoughts on how to better distribute the heat around the trailer? With many thanks for advice!
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10-26-2021, 05:51 PM #2
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I’m following this thread. We got our new 2021 28BH in October of 2020. Getting the temperature up to an acceptable level has been problematic in the bunk room as well. We ran the heat, our first fall, to the point that the sliding door above the vent in the front bedroom has delaminated at the bottom. Grand Design is sending a new door. The service department thinks it’s because the door was faulty. I suspect otherwise.
2021 Reflection 28BH, 09/20 build
2018 Ram Mega Cab 6.4L Hemi
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10-26-2021, 06:20 PM #3
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that's what I;m talking about - the furnace is insanely hot, but distribution is awful. hoping someone on here has some advice. to block off the bedroom vent we installed a metal register cover and put magnetic sheets over it for now, but I am not sure if this is a good idea. Hoping for more input! Cheers!
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10-26-2021, 06:46 PM #4
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I have a 2018 28BH and have the same disappointment regarding heat flow to the bunkhouse. I thought maybe I had a duct that came off because there is low to no flow. Nothing appeared to be separated or pinched off. I then chose to pull down my underbelly Coroplast. The duct runs from the furnace on the left to the right of the trailer then runs all the way to the rear and then crosses back to the left and routes forward to the duct. It's a very long run. I've lived with the poor performance thus far but was wondering if I could wire an outlet back there and run an inline fan to suck more heat back there. Considered using a smart plug and controlling it with my phone. It was just a thought I had. No real idea if that would work or not. A relative suggested pulling back the wall to access the furnace and block off a duct that pours too much heat to the bathroom or bedroom. Again haven't tried looking but would like to solve this problem too.
Last edited by jasonl78; 10-26-2021 at 06:54 PM.
2018 Reflection 28BH
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2017 Ram 3500 Mega cab SRW w/6.4L Hemi, Ramboxes, Active Air Rear Suspension
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10-26-2021, 06:51 PM #5
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In our previous rig we had vents in the floor, we used metal vents that were able to be closed or redirected.
We picked them up at Home Depot. It help distribute the heat evenly throughout the rig. I never saw any
issues with doing this.2020 Grand Design Reflection 303RLS 5th Wheel
2013 Ford F250 Super Duty, King Ranch, 6.7 Diesel, HD Tow Package
B&W Companion Slider RVK3405
Timbren Rear Suspension Enhancement System R250SDG
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10-26-2021, 07:00 PM #6
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10-27-2021, 07:25 AM #7
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Short of re arranging the vents off the furnace which involves dropping the coroplast not sure what can be done.
Hotter in the bedroom is very common in GD 5th wheelsMarcy & Gary
2014 Grand Design - Reflection 303RLS
2022 GMC 3500 Denali Duramax Longbed SRW
2015 GMC Denali 3500 - Retired
2003 F350 - retired
Michigan
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10-27-2021, 09:04 AM #8
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Jeffrey,
If you haven't already, I would start by removing the thin rear wall in the basement and checking the back of the furnace to make sure all ducts are firmly connected to their plenum outlets. It's quite common for one or more to fall off causing uneven distribution of heated air. On our previous Reflection fifth wheel, I also found the heat duct going toward the back to the kitchen island had been mashed flat between the Coroplast and a frame cross-member (should have been on top of the cross-member, not under). Of course, I didn't find this until I cut a flap in the Coroplast to see why the kitchen water lines were freezing.
BTW - you can create a signature block with your RV and tow vehicle information (see mine below). That way you won't have to repeat that information whenever you post or ask a question - and others won't have to ask. You can create a signature by going to:
Forum Actions (on menu bar) -> Edit Profile -> Edit Signature (under My Settings on the left)
RobU.S. Army Retired
2012 F350 DRW CC LB Lariat PS 6.7
2020 Solitude 310GK-R, MORryde IS, disc brakes,
Sailun LRG tires, solar, DP windows, W/D
(Previously in a Reflection 337RLS)
Full time since 08/2015
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10-27-2021, 09:14 AM #9
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Double-posted threads merged.
RobU.S. Army Retired
2012 F350 DRW CC LB Lariat PS 6.7
2020 Solitude 310GK-R, MORryde IS, disc brakes,
Sailun LRG tires, solar, DP windows, W/D
(Previously in a Reflection 337RLS)
Full time since 08/2015
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10-27-2021, 09:56 AM #10
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Thank you! I have checked the furnace outlets and all appear on tight. What a mess it is under there!!! After reading posts on here, as soon as I got the trailer I opened that wall and vaccuumed in there and then sealed and holes leading to the underbelly with spray foam. Now I will have to drop the coroplast in the spring to get a peak. It's getting a bit cold here in Ontario to play with that now!
2021 Reflection 28BH Fifth Wheel
2021 GMC Sierra Denali Duramax SRW
Re-pack bearings necessary?
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