Home » Public Forums » GMCnet » Using a ducted A/C unit in our none ducted coaches?
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| Re: Using a ducted A/C unit in our none ducted coaches? [message #353493 is a reply to message #353490] |
Sun, 05 April 2020 09:38   |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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There are a couple done on the photo site. When I have seem them done, you loose headroom, so hopefully they are short like me and have short friends and family.
The really fancy way to do A/C is a mini-split unit and not even have a roof A/C. But that is lots of work.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: [GMCnet] Using a ducted A/C unit in our none ducted coaches? [message #353495 is a reply to message #353493] |
Sun, 05 April 2020 10:18 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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Jim:
I’ve put a bunch of mini-splits in the apartments we own, and the new heat pumps from Mitsubishi just kick out the heat during the winter.
We had a few single digit days, and they didn’t even use the auxiliary resistive heat.
So far, the only installs I’ve seen have the condenser on the back bumper.
Seems to me like it would be a little noisy for those of us who sleep back there… but I would love to hear about it (pun intended).
Here’s a link.
https://youtu.be/IkDoKpivb24
Dolph
DE AD0LF
Wheeling, West Virginia
1977 26’ ex-PalmBeach
Howell EFI & EBL, Reaction Arms, Manny Transmission
“The Aluminum and Fiberglass Mistress"
> On Apr 5, 2020, at 10:38 AM, Jon Roche via Gmclist wrote:
>
> There are a couple done on the photo site. When I have seem them done, you loose headroom, so hopefully they are short like me and have short
> friends and family.
>
>
> The really fancy way to do A/C is a mini-split unit and not even have a roof A/C. But that is lots of work.
> --
> Jon Roche
> 75 palm beach
> EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
> St. Cloud, MN
> http://lqqkatjon.blogspot.com/
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Using a ducted A/C unit in our none ducted coaches? [message #353499 is a reply to message #353495] |
Sun, 05 April 2020 13:57 |
powwerjon
Messages: 849
Registered: March 2013
Karma: -2
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Senior Member |
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Ducted AC upgrades a number of times in the GMC community. Here are some
Pictures and albums:
Be sure to read the comments under each picture, you can be surprised how
much you can miss.
<
http://www.gmcmhphotos.com/photos/it-has-begun/p41963-new-rear-headliner-with-ducted-ac-and-recessed-lights.html
>
<
http://www.gmcmhphotos.com/photos/it-has-begun/p41964-new-rear-headliner-with-ducted-ac-and-recessed-lights.html
>
<
http://www.gmcmhphotos.com/photos/it-has-begun/p41964-new-rear-headliner-with-ducted-ac-and-recessed-lights.html
>
and
<
http://www.gmcmhphotos.com/photos/member-galleries/p28261-dropped-ceiling.html
>
<
http://www.gmcmhphotos.com/photos/member-galleries/p28258-dropped-ceiling.html
>
<
http://www.gmcmhphotos.com/photos/member-galleries/p28255-dropped-ceiling.html
>
Good examples, let your mind run wild.
J.R. Wright
GMC Great Laker
GMCGL Tech Editor
GMC Eastern States
GMCMHI
TZE Zone Restorations
78 Buskirk Custom 29.5' Stretch
75 Avion (Under going Frame up Restoration)
On Sun, Apr 5, 2020 at 8:19 AM Dolph Santorine via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Jim:
>
> I’ve put a bunch of mini-splits in the apartments we own, and the new heat
> pumps from Mitsubishi just kick out the heat during the winter.
>
> We had a few single digit days, and they didn’t even use the auxiliary
> resistive heat.
>
> So far, the only installs I’ve seen have the condenser on the back bumper.
>
> Seems to me like it would be a little noisy for those of us who sleep back
> there… but I would love to hear about it (pun intended).
>
> Here’s a link.
>
> https://youtu.be/IkDoKpivb24
>
>
> Dolph
>
> DE AD0LF
>
> Wheeling, West Virginia
>
> 1977 26’ ex-PalmBeach
> Howell EFI & EBL, Reaction Arms, Manny Transmission
>
> “The Aluminum and Fiberglass Mistress"
>
>> On Apr 5, 2020, at 10:38 AM, Jon Roche via Gmclist gmclist@list.gmcnet.org> wrote:
>>
>> There are a couple done on the photo site. When I have seem them
> done, you loose headroom, so hopefully they are short like me and have short
>> friends and family.
>>
>>
>> The really fancy way to do A/C is a mini-split unit and not even have a
> roof A/C. But that is lots of work.
>> --
>> Jon Roche
>> 75 palm beach
>> EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
>> St. Cloud, MN
>> http://lqqkatjon.blogspot.com/
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Using a ducted A/C unit in our none ducted coaches? [message #353501 is a reply to message #353499] |
Sun, 05 April 2020 15:45 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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JR:
Love the use of Steel Studs for the standoffs!
Jon Roche, I typed Jim….. my bad.
Dolph
DE AD0LF
Wheeling, West Virginia
1977 26’ ex-PalmBeach
Howell EFI & EBL, Reaction Arms, Manny Transmission
“The Aluminum and Fiberglass Mistress"
> On Apr 5, 2020, at 2:57 PM, John Wright via Gmclist wrote:
>
> Ducted AC upgrades a number of times in the GMC community. Here are some
> Pictures and albums:
>
> Be sure to read the comments under each picture, you can be surprised how
> much you can miss.
>
> http://www.gmcmhphotos.com/photos/it-has-begun/p41963-new-rear-headliner-with-ducted-ac-and-recessed-lights.html
>>
> http://www.gmcmhphotos.com/photos/it-has-begun/p41964-new-rear-headliner-with-ducted-ac-and-recessed-lights.html
>>
> http://www.gmcmhphotos.com/photos/it-has-begun/p41964-new-rear-headliner-with-ducted-ac-and-recessed-lights.html
>>
>
> and
>
> http://www.gmcmhphotos.com/photos/member-galleries/p28261-dropped-ceiling.html
>>
> http://www.gmcmhphotos.com/photos/member-galleries/p28258-dropped-ceiling.html
>>
> http://www.gmcmhphotos.com/photos/member-galleries/p28255-dropped-ceiling.html
>>
>
> Good examples, let your mind run wild.
>
> J.R. Wright
> GMC Great Laker
> GMCGL Tech Editor
> GMC Eastern States
> GMCMHI
> TZE Zone Restorations
> 78 Buskirk Custom 29.5' Stretch
> 75 Avion (Under going Frame up Restoration)
>
>
>
> On Sun, Apr 5, 2020 at 8:19 AM Dolph Santorine via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> Jim:
>>
>> I’ve put a bunch of mini-splits in the apartments we own, and the new heat
>> pumps from Mitsubishi just kick out the heat during the winter.
>>
>> We had a few single digit days, and they didn’t even use the auxiliary
>> resistive heat.
>>
>> So far, the only installs I’ve seen have the condenser on the back bumper.
>>
>> Seems to me like it would be a little noisy for those of us who sleep back
>> there… but I would love to hear about it (pun intended).
>>
>> Here’s a link.
>>
>> https://youtu.be/IkDoKpivb24
>>
>>
>> Dolph
>>
>> DE AD0LF
>>
>> Wheeling, West Virginia
>>
>> 1977 26’ ex-PalmBeach
>> Howell EFI & EBL, Reaction Arms, Manny Transmission
>>
>> “The Aluminum and Fiberglass Mistress"
>>
>>> On Apr 5, 2020, at 10:38 AM, Jon Roche via Gmclist > gmclist@list.gmcnet.org> wrote:
>>>
>>> There are a couple done on the photo site. When I have seem them
>> done, you loose headroom, so hopefully they are short like me and have short
>>> friends and family.
>>>
>>>
>>> The really fancy way to do A/C is a mini-split unit and not even have a
>> roof A/C. But that is lots of work.
>>> --
>>> Jon Roche
>>> 75 palm beach
>>> EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
>>> St. Cloud, MN
>>> http://lqqkatjon.blogspot.com/
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: Using a ducted A/C unit in our none ducted coaches? [message #353506 is a reply to message #353493] |
Mon, 06 April 2020 09:40 |
GatsbysCruise
Messages: 261
Registered: January 2017
Location: Waukegan, Illinois
Karma: 3
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Senior Member |
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lqqkatjon wrote on Sun, 05 April 2020 09:38There are a couple done on the photo site. When I have seem them done, you loose headroom, so hopefully they are short like me and have short friends and family.
The really fancy way to do A/C is a mini-split unit and not even have a roof A/C. But that is lots of work.
------------------- -
Here is a minisplit, 120v uses LESS energy than the monster on the roof of our RV's
Enjoy.
Mini Split install
https://www.youtube.com/watch?v=fbn5MXmJpzY
Mini Split Running
https://www.youtube.com/watch?v=pYhJz6ScJfk
GatsbysCruise. \
74GMC260 Former Glacier Model style. \
Waukegan, Illinois \ Keep those MiniDiscs Spinning \ MY GREYHOUND IS FASTER THAN YOUR HONOR ROLL STUDENT \ WindowsXP-Win7-Win8.1-UBUNTU STUDIO - UBUNTU VOYAGER - Berzin Auto Center
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| Re: [GMCnet] Using a ducted A/C unit in our none ducted coaches? [message #353514 is a reply to message #353495] |
Mon, 06 April 2020 13:22 |
TR 1
Messages: 348
Registered: August 2015
Location: DFW
Karma: -7
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Senior Member |
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Dolph Santorine wrote on Sun, 05 April 2020 10:18Jim:
So far, the only installs I've seen have the condenser on the back bumper.
Seems to me like it would be a little noisy for those of us who sleep back there... but I would love to hear about it (pun intended).
I installed a regular rotary-compressor based mini-split in my garage probably 10 years ago, and it is fairly quiet, but I agree, would not want one on my back bumper.
But the new inverter based units are shockingly quiet... I've installed a couple for friends, and I could not believe how quiet it was. And I can't wait till that technology makes it into RV ACs... Whether that be in a roof-top unit, or in an RV based mini-split....
For comparison, the Atwood Air Command, which is one of the quieter RV ACs out there is around 62-63db..... The new inverter mini-splits are usually lower than 40db inside, and even the outdoor units are in the low 50db range.... That's a huge difference, when you consider every 3db change is double the sound energy.
If I ever do a full remodel so I could easily run the lines, one of the 2 zone inverter mini-splits would probably be how I would want to go... Place one indoor unit in the back bedroom across the rear window, and one on the side near the front of the coach running off of one outdoor unit mounted on the rear bumper would be fantastic... Even better if they come up with some compact compressor/condensor unit that could be mounted on the roof, or in a storage compartment....
On top of all that, they use less power, and are soft starting by nature...
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
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| Re: Using a ducted A/C unit in our none ducted coaches? [message #353517 is a reply to message #353516] |
Mon, 06 April 2020 14:38 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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It has been ages since I was shopping A/C units, but when I did, I researched them all......
from what I remember, all the top units are generally equal if it is a ducted unit or a non-ducted unit. You can usually buy the top separate, and the inside separate, or as a kit.
so a "ducted" version, should only need a "non-ducted" inside to make it a non-ducted type. That was the case with the atwood air-command, the coleman mach8 and a few others at that time.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: Using a ducted A/C unit in our none ducted coaches? [message #353518 is a reply to message #353516] |
Mon, 06 April 2020 15:00 |
Bill Van Vlack
Messages: 419
Registered: September 2015
Location: Guemes Island, Washington
Karma: 14
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Senior Member |
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Maybe there is an elegant way to adapt a residential mini-split to a GMC, but I haven't seen any that I'd do myself. The outdoor unit needs a fresh air supply and exhaust to reject heat (AC) or cold (Heating) and two refrigeration lines run between it and the indoor unit(s). Maybe better than taking the door off of a refrigerator, laying it down, and bolting it to the roof - but not much. I think we'll have to wait until they are available at Camping World and see if they'd work for us.
Perhaps a close coupled outdoor and indoor unit symmetrical with the existing A/C opening, with the indoor unit using the opening to circulate cooled or heated air from the coach ; and the outdoor coil and fan on one side to reject heat/cold to the outside air with the compressor and controls on the other. But would the roof support it?
The magic of the mini-split is the variable speed compressor and fans and the low volume supply air maintaining a constant temperature, quiet living space. Not as good for pulling into a campground and blasting lots of cold air.
Bill Van Vlack
'76 Royale; Guemes Island, Washington; Twin bed, full (DS) side bath, Brazilian Redwood counter and settee tops,455, 6KW generator; new owner a/o mid November 2015.
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