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Old 07-13-2018, 10:33 PM   #1
twvette
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Fuzion 420 Air Conditioner ... duct layout/fixes/improvements

Been reading the AC posts for a while now and decided to take the deep dive into mine. It seems like a mess to me in general and found some big issues! Not happy !!!

Here is the duct layout on my 2016 two AC unit with one AC in garage and other in bedroom up front. Not sure they did all of these the same but it is how mine was done. I removed the vents and used a tape measure to see where they all went once an for all:
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- the divider in both units keeps falling as just wedged in there so will tape it up to stay
- several vent locations have poor tape seal
- one vent in kitchen the tape was not sealing at all from the roof panel
- The other vent in kitchen is destroyed just above the sink. Can tell it was never right. The hole is off by about 2 inches to mate with the duct. Worse, the duct is ripped for a couple feet in both directions. Lots of wires under duct so wonder if they ripped it pulling wires. Could tell by the tape it was destroyed at factory and just tried to make it look normal rather than fix.
- Not sure why they tried to tie one AC to the other AC on one duct for one of the runs as seems they might fight each other.
- The duct that runs thru the kitchen and in bathroom are terminated, but they ran three and two feet longer respectively past the vent which is just dead space.

No wonder why I cant come close to keeping the rig cool! I never wanted to learn about AC ducting but have been forced to and it took me a while and a lot of reading/messing around to figure it out in my head to solve yet another issue I should not have needed to.

I already have a plan to fix all this with a lot of help from the other AC posts and its late so will add add more info later ...
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Old 07-14-2018, 04:02 AM   #2
SC Dreamer
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I believe the ducts are supposed to make a complete circle "raceway". Are you certain they terminate over the stove area? I have thought about buying a camera thingy for my smart phone and run down mine, but haven't. I kinda don't want to know, lol.
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Old 07-15-2018, 10:38 AM   #3
twvette
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I don't think a "raceway" design is a good idea either. If one AC is off that adds a lot of volume to try and pressurize and don't think you see this in residential/commerical either but not sure.

Yeah, I triple checked them. There is about 3 feet gap between them when look at the tape measurements compared to wall length. Further verification was can see the light reflect back with photo from camera where it does not do this on the ones that are connected.

Just my luck I took my bore scope home last trip as it would have been really nice to fully inspect all ducts to see if any others might be torn somewhere. They are cheap on Amazon.
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Old 07-15-2018, 12:10 PM   #4
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So here is what I did in terms of re-configuring/improving/fixing the ducted vents...

1. Plugged the two vents just in front of the garage AC and the one vent next to the bedroom AC. I don't see the point of these. Can get the airflow you need with the vents on the A/C. With these vents open going to have a much harder time getting flow to the other ducts at most will come out of these vents a basically the path of least resistance.
A. To plug the bedroom vent, made about 1in thick foam out of several
layers of some thin rolled foamed that others have used (as proper
closed cell type to handle moisture properly) to put in the
~5in vent hole and taped it. Want to be careful however you do this as
don't want it sticking up into ducting much as it would then restrict
flow to the other vents on the same duct.
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B. *** This one only applies to me since I had a damaged duct per #3
below or for those with other configurations/reasons want to plug
directly at the AC unit **** Since my the one vent in bedroom was
now the only one connected to the right side duct outlet on the AC
unit, I used some pipe insulation that was about 2in outside diameter
and carefully squeezed it into the duct then taped it off. to ensure
sealed.

This is the pipe insulation used for this and #2 and #3 below to terminate going into extra ducting. I taped around it afterwards to ensure fully sealed.
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2. Blocked the extra ducting that extended off the front bathroom duct and the living room one.
A. Used the pipe insulation for this also and basically took like a 12in
piece and did the best I could to wedge it in as a v-shape just behind
the vent hole. Taped around and over it to as well and tried to go over
the hole inside the foam at the ends as best as possible.
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3. Terminated the duct that both AC's would have been connect to. I don't think this is a good idea as they might fight each other and when one is not on that is way too much volume for one A/C to try and feed into IMHO.
A. I actually had no choice as my duct near the kitchen/front door was
destroyed. I plugged this vent but would have been nice to keep it. I
would have used the pipe insulation to terminate the duct just behind
this vent to separate the two AC units. With the bedroom vent plugged
this would be only one on right side of bedroom AC so would get really
good flow then to help with living room cooling.
B. Terminated the duct at the left side of the TV/closest to patio door with
the pipe insulation so it would be the only one on the left side outlet of
the garage AC and it gets really good flow now.

4. Unscrewed all vents from the ceiling to inspect properly and repaired all that were not taped properly to seal the roof heat from the vent hole. As mentioned I had some that were essentially completely open and only a couple had just minor gaps. Did this on all, even the ones I plugged just to ensure sealed as best as possible from roof heat.
Not great, small leaks
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Really bad!
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Fixed
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5. Put the divider in the AC back up and position properly and taped it so will hold as mine keep falling down. Just need to remove outer plastic cover to do this as fair amount of working space. This is critical or wont get much cold air from the AC units to start with. Also taped it up as don't like the non dense insulation seals they use and mine were starting to tear or had some gaps between the housing. Taped up all the ducting, etc. inside the A/Cs as was just done poorly to start with.

Divider fell over
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Divider stood back up but no tape
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Taped divider
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**** Had to split this original post ... see few posts down to continue ****
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Old 07-15-2018, 01:41 PM   #5
twvette
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After doing the above the AC is MUCH better.

The vents in the living room have good flow now. Today it is warm, muggy, partially overcast day and first time ever the AC's have really cycled on and off that I have seen and keeping it in at 75 degrees. Still not sure it will keep up on a hot sunny day but big improvement.

The flow I can have into the bathroom is rediculous and almost like being next to the direct AC vent (there is a video of this in link above). Can freeze myself out of the bedroom and bathroom now which is finally normal compared to other toy haulers I have had in past.

Enjoying the ACs being rattle free too if nothing else !!!!

Hope all this helps someone as previous ACs posts have helped me ...
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Old 07-15-2018, 04:16 PM   #6
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Glad it worked out! Good job! No links for pics or video?
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Old 07-21-2018, 03:24 PM   #7
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Quote:
Originally Posted by SC Dreamer View Post
Glad it worked out! Good job! No links for pics or video?
Fixed the link. I also added descriptions to each of the pics in the link so click on the "i" button after opening a pic for info about it as you look at each pic/video.
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Old 07-22-2018, 04:04 AM   #8
SC Dreamer
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Quote:
Originally Posted by twvette View Post
Fixed the link. I also added descriptions to each of the pics in the link so click on the "i" button after opening a pic for info about it as you look at each pic/video.
Thanks for trying, getting 404 error on link
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Old 07-22-2018, 06:32 AM   #9
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I'd like to see the pics as well ... getting 404 error.
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Old 07-22-2018, 08:03 AM   #10
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twvette

Your link is to a Google account sign-in page and is not permitted on this forum. That's probably why most are getting a 404 error.

If you have the photos on your computer or phone, click on the "paperclip" at the top of your reply screen and then attach the photos to your response. That way all of them will be available to everyone on this forum.

The forum rules prohibit links to sites that require membership. It's one of the SPAM prevention considerations.

So, just post the photos here and make it easy for everyone who is interested in your project.
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