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Old 05-31-2016, 03:18 PM   #1
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1973 31' Sovereign
van nuys , California
Join Date: Mar 2005
Posts: 21
Ducted Air Conditioning

I am replacing my AC in my 31' 1973 AS. Since we live in southern California the centered system is inefficient and I want to duct it. Did anyone have any experience doing this change. I will be using a Dometic B 59516.XX1C0 (15,000 btu) that can be used ducted or not. I have access to aluminum custom ducts.
Anyone out there?

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Old 05-31-2016, 03:48 PM   #2
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1972 31' Sovereign
1975 31' Excella 500
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Benton , Arkansas
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It could be done, but you will lose ceiling height.

I think that if you were to go way broad with your duct, you could maybe keep the total thickness of the duct to two inches or maybe even one if you got way creative.

(Factory ducted air Airstreams use a bulge in the roof to accommodate the ducting.)

Superat stultitia.

The fact that I am opinionated does not presuppose that I am wrong......

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Old 06-19-2016, 02:43 PM   #3
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1984 31' Excella
Kingwood , Texas
Join Date: May 2016
Posts: 4
I'm looking at doing a ducted system in a 1984 Excella. Don't know if I'll do one Dometic unit or two. Does anyone know where to find some specs of the newer units? Would like to know how many registers, returns, etc. Also, if you go with two units, do they both use the same duct? Appreciate any help.
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Old 06-19-2016, 08:25 PM   #4
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2016 30' Classic
Erie , Colorado
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Chris both systems are ducted together. 12 outlets, 6 each side front to back and 4 air returns, two for each AC unit. The new trailers are taller to accommodate the ducting without reducing interior headroom. Not sure how you would accomplish this with an older trailer. Ducts themselves are foil covered rigid foam rectangular, about 6w x 2-3h.
2015 Classic
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Old 06-20-2016, 06:43 PM   #5
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1984 31' Excella
Kingwood , Texas
Join Date: May 2016
Posts: 4
Thank you for the response. Do you know how many registers are installed if only one 15k air conditioner is ducted? Is it still a two duct layout?

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Old 06-20-2016, 06:58 PM   #6
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1994 30' Excella
Mississauga , Ontario
Join Date: Jun 2004
Posts: 880
dometic web site gives duct requirements for their units. If I remember correctly it is 2inch by 7inch at each end of the airconditioner. If you did that it would not be lower than the airconditioner is now. I have contemplated it as well. Thought to duct from the unit back to the door into my mid bath. Then vent out to the rear. It should double the amount reaching the rear bedroom. Going forward I thought to go as far as the front end of the upper cabinets of the kitchen. That would leave full ceiling height in the front living area.

Al and Jean

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