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Old 04-28-2014, 07:33 AM   #57
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1997 34' Limited
1970 27' Overlander
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Is this in conjunction with a roof mounted system?
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Craig and Carol
1997 34' Excella 1000
1970 27' Overlander, International
2009 Ford F150 5.4L
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AIR 41028
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Old 04-29-2014, 04:27 AM   #58
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1987 34' Excella
Asheboro , North Carolina
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Yes. I have 2 Dometic Penguins. Thats what started all of this. I installed the rear one and it was a noisy as the first one. So I took both off and lined them with Dynamat and installed a 3/4" thick mounting foam spacer on bottom of ac. That helped with vibration and compressor noise but air noise inside was still intolerable. So I built the duct work and air boxes. The Coleman that can on this AS new was fine, even in Arizona summer, but these Penguins are not what they should be these days. Bought both new. Factory and Dealer say they are normal. Maybe. But still poor by comparison. If you want the drip pan, you're stuck. Click image for larger version

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Old 04-29-2014, 08:14 PM   #59
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1966 24' Tradewind
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Walker

I want to compliment you on your first class design and installation work on your duct work system.

Are you happy now with the noise level and cold air distribution? I assume you can operate either one or both AC units depending on the outside temperature.

Dan
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Old 04-30-2014, 04:19 AM   #60
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Yes, the two units operate independently with the same front to rear duct. The noise level is acceptable. Comparable to other high level RV with ducted ceiling air. We can talk at reasonable level from front coach to bedroom with AC on. Not possible before. At night with only front AC on we have nice air stirring in bed and very quite. The bathroom is another much improved area with a vent placed at entrance.
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Old 07-26-2014, 01:50 PM   #61
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Ducting approaches??

Anyone else tried this with a single unit yet? If so, what did you use as the ductwork material?

I've attached my approach. I'm considering ducting thru the center light unit and back into the bedroom to reduce noise and drafts.

Any comments appreciated.
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