Home » Public Forums » GMCnet » Rooftop ac... Atwood vs Coleman? Plus configuration question
| Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334737] |
Fri, 06 July 2018 15:55  |
Will Albers
Messages: 183
Registered: November 2017
Location: Detroit MI (Belleville)
Karma: 2
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Senior Member |
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I still have the stock Duo-Therm front and rear. The rear started popping the circuit breaker when warm, plus the fins are falling apart on the condenser. The big one in the middle works ok. It's not great, but it does the job ok.
My dash ac works well.
I'm incredibly ac dependent so I'm focused on a much stronger rooftop setup.
I was giving thought to new 15k and a 13k to replace everything. Coleman vs Atwood. Do folks have any advice or opinion on one brand over another? I see Atwood was recently purchased. Did the quality drop?
I also like the idea of more air to the front of the coach for driving, so I'm considering using the front two holes for ac. If I do such, does it make sense just to put in 2 13k units and save some money?
We never sit in the back when traveling, and we freeze the coach out with the single ac at night. No need for one in the back when everyone sits up front.
1978 Palm Beach.
Detroit Michigan
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| Re: [GMCnet] Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334739 is a reply to message #334737] |
Fri, 06 July 2018 16:08  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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On Fri, Jul 6, 2018 at 1:55 PM, Will Albers wrote:
> I still have the stock Duo-Therm front and rear. The rear started popping
> the circuit breaker when warm, plus the fins are falling apart on the
> condenser. The big one in the middle works ok. It's not great, but it does
> the job ok.
>
> My dash ac works well.
>
> I'm incredibly ac dependent so I'm focused on a much stronger rooftop
> setup.
>
> I was giving thought to new 15k and a 13k to replace everything. Coleman
> vs Atwood. Do folks have any advice or opinion on one brand over another? I
> see Atwood was recently purchased. Did the quality drop?
>
> I also like the idea of more air to the front of the coach for driving, so
> I'm considering using the front two holes for ac. If I do such, does it
> make sense just to put in 2 13k units and save some money?
>
> We never sit in the back when traveling, and we freeze the coach out with
> the single ac at night. No need for one in the back when everyone sits up
> front.
> --
> 1978 Palm Beach.
> Detroit Michigan
> In need of several pieces to replace water damage
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334740 is a reply to message #334739] |
Fri, 06 July 2018 16:13 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Will, The Atwood is not the same, so your better off with the Colman, as
they are onsidered to be a good unit.
As long as you have room outside to mount the units, having the two units
toward the front makes sense.
If interested, we can quote a delivered price on them.
On Fri, Jul 6, 2018 at 2:08 PM, Jim Kanomata wrote:
>
>
> On Fri, Jul 6, 2018 at 1:55 PM, Will Albers wrote:
>
>> I still have the stock Duo-Therm front and rear. The rear started popping
>> the circuit breaker when warm, plus the fins are falling apart on the
>> condenser. The big one in the middle works ok. It's not great, but it
>> does the job ok.
>>
>> My dash ac works well.
>>
>> I'm incredibly ac dependent so I'm focused on a much stronger rooftop
>> setup.
>>
>> I was giving thought to new 15k and a 13k to replace everything. Coleman
>> vs Atwood. Do folks have any advice or opinion on one brand over another? I
>> see Atwood was recently purchased. Did the quality drop?
>>
>> I also like the idea of more air to the front of the coach for driving,
>> so I'm considering using the front two holes for ac. If I do such, does it
>> make sense just to put in 2 13k units and save some money?
>>
>> We never sit in the back when traveling, and we freeze the coach out with
>> the single ac at night. No need for one in the back when everyone sits up
>> front.
>> --
>> 1978 Palm Beach.
>> Detroit Michigan
>> In need of several pieces to replace water damage
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
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Unsubscribe or Change List Options:
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334743 is a reply to message #334740] |
Fri, 06 July 2018 16:17 |
Will Albers
Messages: 183
Registered: November 2017
Location: Detroit MI (Belleville)
Karma: 2
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Senior Member |
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Thanks for that jim. Of course I would like a quote from ya! I think I'll
try a single 15k for now, plus a new fan in the rear. I'd like a fan with
the weather shroud, but not interested in the style that requires a remote.
On Fri, Jul 6, 2018, 5:13 PM Jim Kanomata wrote:
> Will, The Atwood is not the same, so your better off with the Colman, as
> they are onsidered to be a good unit.
> As long as you have room outside to mount the units, having the two units
> toward the front makes sense.
> If interested, we can quote a delivered price on them.
>
> On Fri, Jul 6, 2018 at 2:08 PM, Jim Kanomata
> wrote:
>
>>
>>
>> On Fri, Jul 6, 2018 at 1:55 PM, Will Albers
> wrote:
>>
>>> I still have the stock Duo-Therm front and rear. The rear started
> popping
>>> the circuit breaker when warm, plus the fins are falling apart on the
>>> condenser. The big one in the middle works ok. It's not great, but it
>>> does the job ok.
>>>
>>> My dash ac works well.
>>>
>>> I'm incredibly ac dependent so I'm focused on a much stronger rooftop
>>> setup.
>>>
>>> I was giving thought to new 15k and a 13k to replace everything. Coleman
>>> vs Atwood. Do folks have any advice or opinion on one brand over
> another? I
>>> see Atwood was recently purchased. Did the quality drop?
>>>
>>> I also like the idea of more air to the front of the coach for driving,
>>> so I'm considering using the front two holes for ac. If I do such, does
> it
>>> make sense just to put in 2 13k units and save some money?
>>>
>>> We never sit in the back when traveling, and we freeze the coach out
> with
>>> the single ac at night. No need for one in the back when everyone sits
> up
>>> front.
>>> --
>>> 1978 Palm Beach.
>>> Detroit Michigan
>>> In need of several pieces to replace water damage
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>
>>
>>
>> --
>> Jim Kanomata
>> Applied/GMC, Newark,CA
>> jimk@appliedairfilters.com
>> http://www.appliedgmc.com
>> 1-800-752-7502
>>
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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1978 Palm Beach.
Detroit Michigan
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| Re: [GMCnet] Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334744 is a reply to message #334739] |
Fri, 06 July 2018 17:15 |
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Anonymous
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Several years back I replaced my single original Duotherm air conditioner with a 15,000 btu one. It was the high efficiency one and draws about 12 amps versus the 15 amps of the old 13,500 BYU. The old one was noisy and didn’t circulate the air as well as the new one.
My 77 is well insulated as I sprayed foam into it years back. The single 15000 Briskair keeps me cool even when visiting my son in Phoenix in the summer in 110 to 120 heat. It is center mounted across from the door.
Emery Stora
77 Kingsley
Frederick, CO
> On Jul 6, 2018, at 3:08 PM, Jim Kanomata wrote:
>
>> On Fri, Jul 6, 2018 at 1:55 PM, Will Albers wrote:
>>
>> I still have the stock Duo-Therm front and rear. The rear started popping
>> the circuit breaker when warm, plus the fins are falling apart on the
>> condenser. The big one in the middle works ok. It's not great, but it does
>> the job ok.
>>
>> My dash ac works well.
>>
>> I'm incredibly ac dependent so I'm focused on a much stronger rooftop
>> setup.
>>
>> I was giving thought to new 15k and a 13k to replace everything. Coleman
>> vs Atwood. Do folks have any advice or opinion on one brand over another? I
>> see Atwood was recently purchased. Did the quality drop?
>>
>> I also like the idea of more air to the front of the coach for driving, so
>> I'm considering using the front two holes for ac. If I do such, does it
>> make sense just to put in 2 13k units and save some money?
>>
>> We never sit in the back when traveling, and we freeze the coach out with
>> the single ac at night. No need for one in the back when everyone sits up
>> front.
>> --
>> 1978 Palm Beach.
>> Detroit Michigan
>> In need of several pieces to replace water damage
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
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| Re: [GMCnet] Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334751 is a reply to message #334744] |
Fri, 06 July 2018 19:24 |
Will Albers
Messages: 183
Registered: November 2017
Location: Detroit MI (Belleville)
Karma: 2
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Senior Member |
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Thanks emery, that's encouraging. It's something I hoped to hear.
I wonder if the original center duotherm fits on the rear? Maybe I'll swap
and see how it works out.
On Fri, Jul 6, 2018, 6:16 PM Emery Stora via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Several years back I replaced my single original Duotherm air conditioner
> with a 15,000 btu one. It was the high efficiency one and draws about 12
> amps versus the 15 amps of the old 13,500 BYU. The old one was noisy and
> didn’t circulate the air as well as the new one.
> My 77 is well insulated as I sprayed foam into it years back. The single
> 15000 Briskair keeps me cool even when visiting my son in Phoenix in the
> summer in 110 to 120 heat. It is center mounted across from the door.
>
> Emery Stora
> 77 Kingsley
> Frederick, CO
>
>> On Jul 6, 2018, at 3:08 PM, Jim Kanomata wrote:
>>
>>> On Fri, Jul 6, 2018 at 1:55 PM, Will Albers
> wrote:
>>>
>>> I still have the stock Duo-Therm front and rear. The rear started
> popping
>>> the circuit breaker when warm, plus the fins are falling apart on the
>>> condenser. The big one in the middle works ok. It's not great, but it
> does
>>> the job ok.
>>>
>>> My dash ac works well.
>>>
>>> I'm incredibly ac dependent so I'm focused on a much stronger rooftop
>>> setup.
>>>
>>> I was giving thought to new 15k and a 13k to replace everything. Coleman
>>> vs Atwood. Do folks have any advice or opinion on one brand over
> another? I
>>> see Atwood was recently purchased. Did the quality drop?
>>>
>>> I also like the idea of more air to the front of the coach for driving,
> so
>>> I'm considering using the front two holes for ac. If I do such, does it
>>> make sense just to put in 2 13k units and save some money?
>>>
>>> We never sit in the back when traveling, and we freeze the coach out
> with
>>> the single ac at night. No need for one in the back when everyone sits
> up
>>> front.
>>> --
>>> 1978 Palm Beach.
>>> Detroit Michigan
>>> In need of several pieces to replace water damage
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>>
>>
>>
>> --
>> Jim Kanomata
>> Applied/GMC, Newark,CA
>> jimk@appliedairfilters.com
>> http://www.appliedgmc.com
>> 1-800-752-7502
>> _______________________________________________
>> 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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1978 Palm Beach.
Detroit Michigan
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| Re: [GMCnet] Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334752 is a reply to message #334751] |
Fri, 06 July 2018 19:42 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Will,
If you have a Ladder and rack, be sure to measure to see the the frot one
does not interfere with it.
On Fri, Jul 6, 2018 at 5:24 PM, Will wrote:
> Thanks emery, that's encouraging. It's something I hoped to hear.
>
> I wonder if the original center duotherm fits on the rear? Maybe I'll swap
> and see how it works out.
>
> On Fri, Jul 6, 2018, 6:16 PM Emery Stora via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> Several years back I replaced my single original Duotherm air conditioner
>> with a 15,000 btu one. It was the high efficiency one and draws about 12
>> amps versus the 15 amps of the old 13,500 BYU. The old one was noisy and
>> didn’t circulate the air as well as the new one.
>> My 77 is well insulated as I sprayed foam into it years back. The single
>> 15000 Briskair keeps me cool even when visiting my son in Phoenix in the
>> summer in 110 to 120 heat. It is center mounted across from the door.
>>
>> Emery Stora
>> 77 Kingsley
>> Frederick, CO
>>
>>> On Jul 6, 2018, at 3:08 PM, Jim Kanomata
> wrote:
>>>
>>>> On Fri, Jul 6, 2018 at 1:55 PM, Will Albers
>> wrote:
>>>>
>>>> I still have the stock Duo-Therm front and rear. The rear started
>> popping
>>>> the circuit breaker when warm, plus the fins are falling apart on the
>>>> condenser. The big one in the middle works ok. It's not great, but it
>> does
>>>> the job ok.
>>>>
>>>> My dash ac works well.
>>>>
>>>> I'm incredibly ac dependent so I'm focused on a much stronger rooftop
>>>> setup.
>>>>
>>>> I was giving thought to new 15k and a 13k to replace everything.
> Coleman
>>>> vs Atwood. Do folks have any advice or opinion on one brand over
>> another? I
>>>> see Atwood was recently purchased. Did the quality drop?
>>>>
>>>> I also like the idea of more air to the front of the coach for
> driving,
>> so
>>>> I'm considering using the front two holes for ac. If I do such, does
> it
>>>> make sense just to put in 2 13k units and save some money?
>>>>
>>>> We never sit in the back when traveling, and we freeze the coach out
>> with
>>>> the single ac at night. No need for one in the back when everyone sits
>> up
>>>> front.
>>>> --
>>>> 1978 Palm Beach.
>>>> Detroit Michigan
>>>> In need of several pieces to replace water damage
>>>>
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>>
>>>
>>>
>>>
>>> --
>>> Jim Kanomata
>>> Applied/GMC, Newark,CA
>>> jimk@appliedairfilters.com
>>> http://www.appliedgmc.com
>>> 1-800-752-7502
>>> _______________________________________________
>>> 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
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334755 is a reply to message #334737] |
Fri, 06 July 2018 20:47 |
Scott Nutter
Messages: 782
Registered: January 2015
Location: Houston/San Diego
Karma: 4
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Senior Member |
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I'm disappointed to hear that the new Atwoods are not as good as the older ones.
I absolutely love my 3year old 15000 btu Atwood. I especially like the 3 speeds for the fan. I have a 15000 btu Coleman mach in the aft. It is a solid unit, but I wish it had a 3 speed fan vs a 2 speed fan.
Will, if I was to do it over, I would stick with the Atwood 15k unit in the forward cutout. Then put in a 9k to 11k in the aft cutout. That's where my bedroom is and a 15k unit is way overkill. It constantly short cycles.
But honestly, we only run 1 ac at a time down here in Texas. Even on the hottest days.
We run the aft AC in the day with the outflow air vents fully open directed forward. Then at nights, we run the fwd AC with the vents fully open directed towards the aft. That way it stays nice, cool, and quiet.
But at the same time we have sunscreens in the windows that are exposed to the sun side to block out the sun.
Scott.
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI
Houston, Texas
[Updated on: Sat, 07 July 2018 12:16] Report message to a moderator |
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| Re: Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334802 is a reply to message #334755] |
Sun, 08 July 2018 12:29 |
Justin Brady
Messages: 769
Registered: April 2015
Location: Bell Buckle, TN
Karma: 11
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Senior Member |
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I've got 2 mach8 Coleman's and they are ok.
They cool well enough (I think the stock duotherms we're just as good if not better, but at a higher amp draw) but the inside mechanism is cheap and the vents dont work worth a damn. I've jammed the rear vent of the front one so it only blows forward.
I think I'll eventually get around to building my own inside boxes so I can vent it the way I'd like.
It works, it just looks and feels cheap. Iev found that with all things RV specific.
Justin Brady
http://www.thegmcrv.com/
1976 Palm Beach 455
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| Re: Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334805 is a reply to message #334737] |
Sun, 08 July 2018 12:49 |
GatsbysCruise
Messages: 261
Registered: January 2017
Location: Waukegan, Illinois
Karma: 3
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Senior Member |
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My Coach came with a 15000 DuoTherm in the middle section. Fantastic fan in the front section and rear section. For my use, the one has been good, and at night its good to have a breeze come in from the fantastic vent.
Here's a tip if you think it would work.
When I had a SOB RV, I had to replace, or recover the roof. It was to stop leaks and preventive as well. I used a product like COOL SEAL, you just roller it on, use cloth at any joint, including struts, around the vents, etc. There was a particularly different one that they suggested under the Air con. They said that an AC will eventually leak and if you wanted a secure seal, the fix was easy.
They suggested getting treated wood or a wood that is resistant to weather. It needs to be 3/4" thick, and 1 1/2 to 2" wide. Make a square with these pieces, with the 14x14" hole inside. Screw these down over the 14x14" AC access. Seal the entire wooded donut, seams, corners and top with the roofing media, use the cloth and media on all seams. When cured place the AC foam donut then AC on top and attach as you normally would. I did this and I never had a leak after that new roof was installed. Since you are going to have your AC units off anyway, this is a thought. The height is negligable, and wont change the look of the GMC.
Good luck
slc
Gatsbys' CRUISER
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: Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334808 is a reply to message #334737] |
Sun, 08 July 2018 14:28 |
SpookyEng
Messages: 208
Registered: June 2016
Location: Navarre, FL
Karma: -5
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Senior Member |
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We have the Atwood 15k heat pump. One in the forward position. We use the max fan in the bedroom as a ceiling fan at night and the front AC has no problem keeping the coach comfortable in 95 degree Florida weather. I would probably have installed a small AC in the rear if I had a GMC configured coach but it works great as is. May be a different story if it was 110 in the desert.
JD Lisenby- USAF Ret
1978 Royale-455
MacDash, Manny Tranny, FI-tech, 3.70 etc etc
Navarre, FL
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| Re: [GMCnet] Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334886 is a reply to message #334884] |
Mon, 09 July 2018 20:56 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Your talking about one unit, there is difference aMoung units
On Mon, Jul 9, 2018 at 6:14 PM Gordon Gibson
wrote:
> Last year I had a new 15k Coleman Mach 8 installed in my coach. I am
> underwhelmed, to put it mildly. I find it noisy and the output on max
> refrigeration not that cold - nowhere near as cold as the flow coming out
> of the 18-year old Coleman I had in my SOB.
>
> Apparently there is a kit to make the thing run more quietly (
> https://outsideourbubble.com/mach-8-rv-air-conditioner-hush-kit-install-review/
> )
>
> Anyone tried this? AM I the only one to find that the Mach 8 doesn't
> cool anywhere near as well as its ancestors?
> --
> Gordon Gibson
> 1976 23" Norris Upfit
> Montreal West, Quebec, Canada
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334888 is a reply to message #334737] |
Mon, 09 July 2018 22:17 |
Scott Nutter
Messages: 782
Registered: January 2015
Location: Houston/San Diego
Karma: 4
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Senior Member |
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Hey Gordon! How have you been?
But back to the AC's. Gordon, you are 100% correct. The new Coleman mach's Are very noisy. Mostly outside, because of the outside fan. I've talked to the tech's at Coleman, and they are very closed lipped about it. But they have a remedy for it. A different fan blade. But the improved fan blade is still noisy. They went from a 5 blade prop to a 3 blade prop for the outside fan(or vise versa). Just walk outside at a rally and you can hear the newer Coleman mach units....... I think it has to do with cramming too much into a low profile unit(also a horizontal compressor). I have also listened to the Coleman standard height units from the outside, and they are much quieter..
And I've also noticed that it will not cool like a 15,000 btu should. At least compared to the Atwood..my Atwood rocks!!
Keep the laundry clean!!
Scott.
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI
Houston, Texas
[Updated on: Mon, 09 July 2018 22:21] Report message to a moderator |
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| Re: [GMCnet] Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334889 is a reply to message #334888] |
Mon, 09 July 2018 22:43 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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There are several units by all Mfg
We had a Dometic that vibrated all the time till we balanced the blower .
There are adjustments that can be done to cool more.
On Mon, Jul 9, 2018 at 8:22 PM Scott Nutter wrote:
> Hey Gordon! How have you been?
> But back to the AC's. Gordon, you are 100% correct. The new Coleman mach's
> Are very noisy. Mostly outside, because of the outside fan. I've talked to
> the tech's at Coleman, and they are very closed lipped about it. But they
> have a remedy for it. A different fan blade. But the improved fan blade is
> still noisy. They went from a 5 blade prop to a 3 blade prop for the
> outside fan(or vise versa). Just walk outside at a rally and you can hear
> the
> newer Coleman mach units....... I think it has to do with cramming too
> much into a low profile unit(also a horizontal compressor). I have also
> listened to the Coleman standard height units from the outside, and they
> are much quieter..
> Keep the laundry clean!!
> Scott.
> --
> Scott Nutter
> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final
> drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
> installed MSD Atomic EFI
> Houston, Texas
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334920 is a reply to message #334919] |
Wed, 11 July 2018 08:50 |
Will Albers
Messages: 183
Registered: November 2017
Location: Detroit MI (Belleville)
Karma: 2
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Senior Member |
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Is Advent a comparable unit? Anyone running a 15k Advent?
On Wed, Jul 11, 2018 at 8:44 AM Kevin wrote:
> Hi All -
> Related to this topic, we recently completed a trip out west and struggled
> to keep cool enough underway. We have a few notable issues
> - The dash air is low on refrigerant and my remaining can of Duracool
> completely leaked out of the tapper when I tried to top the system off
> prior to
> our trip. So, we're not getting much from the dash.
> - We only have a 4K generator thus can only run a single unit without
> tripping the breaker inconveniently located at the back of the hot
> generator.
> - We didn't take the chance to add insulation when we installed new
> ceiling and wall panels - I could kick myself for that now.
> - We didn't do enough research on this forum prior to purchasing two of
> the 15K Dometic Brisk Air II units (located in the far front and far rear
> roof
> openings). These units have the poorest designed ceiling duct assembly
> imaginable resulting in zero air flow forward. We've yet to modify our
> airbox
> in similar fashion to a few of these intriguing examples:
> http://www.gmcmhphotos.com/photos/miscellaneous/p60291-modified-brisk-air-ii-vent.html
> ,
> http://www.airforums.com/forums/f427/dometic-brisk-ii-install-138335.html
> and for the moment are hanging a 12v box fan in front of the unit to push
> air forwards.
>
> Another annoyance with these units (and possibly the coleman/atwood) is
> they seem to have a higher cutoff temperature than we'd prefer when set to
> the
> coldest temperature.
> I came across this interesting page and will likely try this to adjust the
> setpoint lower and see if we can get a more comfortable temperature prior
> to cycling off.
>
> https://www.thefitrv.com/rv-tips/making-the-rv-significantly-colder-an-air-conditioner-mod/
>
> Hopefully prior to our next long trip we'll have cooler dash air and
> better flow with a longer compressor cycle from our front roof unit!
> I think I also need to look into window tinting :)
>
> Stay cool -
> Kevin
>
>
> --
> '77 Kingsley 26 - Chicago, IL
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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1978 Palm Beach.
Detroit Michigan
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| Re: [GMCnet] Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334949 is a reply to message #334920] |
Wed, 11 July 2018 13:10 |
w schurman
Messages: 49
Registered: June 2015
Karma: 1
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Member |
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Guess I'm just lucky that my Duo Therms work perfectly, tho a tad bit noisy
on the inside and not so much on the outside. They really blow cold and the
air circulation is okay.
On Wed, Jul 11, 2018 at 7:50 AM, Will wrote:
> Is Advent a comparable unit? Anyone running a 15k Advent?
>
> On Wed, Jul 11, 2018 at 8:44 AM Kevin wrote:
>
>> Hi All -
>> Related to this topic, we recently completed a trip out west and
> struggled
>> to keep cool enough underway. We have a few notable issues
>> - The dash air is low on refrigerant and my remaining can of Duracool
>> completely leaked out of the tapper when I tried to top the system off
>> prior to
>> our trip. So, we're not getting much from the dash.
>> - We only have a 4K generator thus can only run a single unit without
>> tripping the breaker inconveniently located at the back of the hot
>> generator.
>> - We didn't take the chance to add insulation when we installed new
>> ceiling and wall panels - I could kick myself for that now.
>> - We didn't do enough research on this forum prior to purchasing two of
>> the 15K Dometic Brisk Air II units (located in the far front and far rear
>> roof
>> openings). These units have the poorest designed ceiling duct assembly
>> imaginable resulting in zero air flow forward. We've yet to modify our
>> airbox
>> in similar fashion to a few of these intriguing examples:
>> http://www.gmcmhphotos.com/photos/miscellaneous/p60291-
> modified-brisk-air-ii-vent.html
>> ,
>> http://www.airforums.com/forums/f427/dometic-brisk-ii-
> install-138335.html
>> and for the moment are hanging a 12v box fan in front of the unit to push
>> air forwards.
>>
>> Another annoyance with these units (and possibly the coleman/atwood) is
>> they seem to have a higher cutoff temperature than we'd prefer when set
> to
>> the
>> coldest temperature.
>> I came across this interesting page and will likely try this to adjust
> the
>> setpoint lower and see if we can get a more comfortable temperature prior
>> to cycling off.
>>
>> https://www.thefitrv.com/rv-tips/making-the-rv-
> significantly-colder-an-air-conditioner-mod/
>>
>> Hopefully prior to our next long trip we'll have cooler dash air and
>> better flow with a longer compressor cycle from our front roof unit!
>> I think I also need to look into window tinting :)
>>
>> Stay cool -
>> Kevin
>>
>>
>> --
>> '77 Kingsley 26 - Chicago, IL
>>
>> _______________________________________________
>> 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
>
--
William S. Schurman
box 772806
Steamboat Springs, CO
80477
1978 Palm Beach
TZE168V100258
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| Re: Rooftop ac... Atwood vs Coleman? Plus configuration question [message #334958 is a reply to message #334737] |
Wed, 11 July 2018 14:52 |
Scott Nutter
Messages: 782
Registered: January 2015
Location: Houston/San Diego
Karma: 4
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Senior Member |
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Kevin,
Thank you very much for the thermostat controller mod link..... I am going to try that on my Coleman mach 15k when I get home..
That might also improve the short cycling it is doing.
Thanks again,
Scott
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI
Houston, Texas
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| Re: Rooftop ac... Atwood vs Coleman? Plus configuration question [message #335009 is a reply to message #334737] |
Thu, 12 July 2018 15:11 |
gibsongo
Messages: 116
Registered: October 2012
Location: Montreal West, Quebec, Ca...
Karma: 0
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Senior Member |
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Hi Scott
Good to hear from you. Not doing much RVing these days - the coach is at its home away from home (Borrmann's Garage) where I had to have two cracked cylinder heads replaced. Still a it mystified by the cause. I haven't found the time to make the 800km trip there and back to pick the coach up and drive it home. Time constraints mean that this is now an end-of-summer project that may even endanger going to the fall rally.
I guess I was seduced by the esthetics of the low profile Coleman Mach 8. I am going to try the modification in my link posted above to try and quiet things down. Next step will be to lower the stop temperature referring to Kevin's link. Kevin, thanks for this. Mercifully up north we need air con a lot less that you down south, but its nice to be able to cool the coach down quickly after a sunny day driving in a goldfish bowl.
Cheers
Gordon
Gordon Gibson
1976 23" Norris Upfit
Montreal West, Quebec, Canada
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