| Adding second roof air conditioner [message #265703] |
Sun, 09 November 2014 07:34  |
leifbert
Messages: 5
Registered: September 2014
Karma: 0
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Junior Member |
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I have been running one Dometic Penguin 13,500 unit for a while now. I bought a second one and I am considering putting it in place of the roof vent forward of the existing a/c unit. I would like to get opinions on this. I don't understand why second air units are put in the bedroom. It seems to me the noise might interfere with sleeping, and in my case I would have to cut the opening. We use our GMC as a hang out at autocross events, and having two in the front might cool the crowd off better. Any thoughts?
1973 Canyonlands 260
Naples, Florida
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| Re: Adding second roof air conditioner [message #265706 is a reply to message #265703] |
Sun, 09 November 2014 07:48  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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leifbert wrote on Sun, 09 November 2014 08:34I have been running one Dometic Penguin 13,500 unit for a while now. I bought a second one and I am considering putting it in place of the roof vent forward of the existing a/c unit. I would like to get opinions on this. I don't understand why second air units are put in the bedroom. It seems to me the noise might interfere with sleeping, and in my case I would have to cut the opening. We use our GMC as a hang out at autocross events, and having two in the front might cool the crowd off better. Any thoughts?
Leifbert,
First, welcome to the group, family, cult, asylum.
The reasons for the second A/C being aft are simple. If you have noticed, it is difficult to circulate air down the hallway. If you may almost noticed that when many of the units are on low cool, the white noise is easy to sleep under.
You may also have a bit of a time pulling power to that location. I don't believe any was done during the build and you won't be able to pull from the existing as the load will be too high.
How long have you owned your coach?
I strongly suggest that you build a sigfile like most of us have. It helps everybody.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Adding second roof air conditioner [message #265715 is a reply to message #265706] |
Sun, 09 November 2014 09:20 |
zeke20
Messages: 24
Registered: August 2013
Karma: 0
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Junior Member |
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I added a second AC unit as I can't stand anything blowing on me nor the noise of the Fan I installed The 2nd unit in the front where it does great job
here in the Texas heat and while going to events. The center Unit does a great Job at nite keeping the Bedroom
cool without the noise and direct Air blowing on Me we used fish tape to get the wire to the outside Wall and in to the
closet and then into the Electric panel My Friend who helped Me and I are both cable Guys and are used to fishing wires into tough spots
On Nov 09, 2014, at 07:48 AM, Matt Colie wrote:
leifbert wrote on Sun, 09 November 2014 08:34
> I have been running one Dometic Penguin 13,500 unit for a while now. I bought a second one and I am considering putting it in place of the roof
> vent forward of the existing a/c unit. I would like to get opinions on this. I don't understand why second air units are put in the bedroom. It
> seems to me the noise might interfere with sleeping, and in my case I would have to cut the opening. We use our GMC as a hang out at autocross
> events, and having two in the front might cool the crowd off better. Any thoughts?
Leifbert,
First, welcome to the group, family, cult, asylum.
The reasons for the second A/C being aft are simple. If you have noticed, it is difficult to circulate air down the hallway. If you may almost
noticed that when many of the units are on low cool, the white noise is easy to sleep under.
You may also have a bit of a time pulling power to that location. I don't believe any was done during the build and you won't be able to pull from
the existing as the load will be too high.
How long have you owned your coach?
I strongly suggest that you build a sigfile like most of us have. It helps everybody.
Matt
--
Matt & Mary Colie - Members GMCMI, GMCES
'73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
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| Re: Adding second roof air conditioner [message #265725 is a reply to message #265703] |
Sun, 09 November 2014 11:11 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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If you have kids a dog or another couple staying overnite and you section off the sleeping areas you won't get much cooling to the rear bedroom. The folks in front will need blankets. As far as noise my wife always slept better with a little air noise and movement (low position).
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: Adding second roof air conditioner [message #265737 is a reply to message #265725] |
Sun, 09 November 2014 14:35 |
George B.
Messages: 213
Registered: February 2012
Karma: 1
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Senior Member |
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I have been considering adding a second unit myself. I replaced my old Dometic Penguin unit with a 15K BTU Atwood Heat-Pump unit last spring hoping that the extra capacity would do a better job cooling however the best it will do in 105 direct sunlight is bring it coach down to about 90. I have a Fantastic Fan in the bedroom and wonder if my 1973 Canyon Lands already has wiring for a second AC in the rear? Any one know? My paint scheme does not help the heat build up either. The sides above the belt line are dark green. However the roof is white.
George Butts
Las Vegas Nevada
73 "Custom 26' Q" & 76 23' Birchaven
71 Honda 600 Coupe & 01 Tracker Toads
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| Re: Adding second roof air conditioner [message #265749 is a reply to message #265737] |
Sun, 09 November 2014 21:14 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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George B. wrote on Sun, 09 November 2014 14:35 wonder if my 1973 Canyon Lands already has wiring for a second AC in the rear? Any one know? My paint scheme does not help the heat build up either. The sides above the belt line are dark green. However the roof is white.
My early '74 did not come with the rear a/c. It was added later. The 120V wiring was not installed at the facotry and was added later when the A/C was installed.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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