Home » Public Forums » GMCnet » Rooftop Air
| Rooftop Air [message #358736] |
Thu, 17 September 2020 14:17  |
LNelson
Messages: 335
Registered: December 2008
Location: Springfield, MO
Karma: 0
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Senior Member |
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I just gave my old air conditioner a burial at sea and bought a Dometic 13.5 unit from my trusted, family owned RV supply house. I have installed these types of units before on my old bus conversion and also my houseboat. The issue with the old one was noise. You could hear it cycle in the cooling mode from the outside, very loud. Inside it was loud and also had a vibration that eventually subsided when the compressor kicked in.
Bottom line: I didn't how good I had it. I hate this new Dometic. This thing directs the air mostly to the rear of the coach, no what combination of flaps and dampers you have open/closed. But the worse part is the noise. The neighbors should be happy but it is like trying to sleep with a lawnmower running in the living area. If that wasn't bad enough, a harmonic THRONG THRONG THRONG (sorry the best I can do to describe the repetitive noise and vibration) kicks in.
What is the quietest rooftop air conditioner that you all have used. I don't want to throw away $1,000 but this thing is junk. Thanks.
Larry
PS.......Dometic tech support is AWOL
Larry Nelson Springfield, MO
Ex GMC'er, then GM Busnut
now '77 Eleganza ARS WB0JOT
[Updated on: Thu, 17 September 2020 14:19] Report message to a moderator |
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| Re: [GMCnet] Rooftop Air [message #358737 is a reply to message #358736] |
Thu, 17 September 2020 14:28  |
Sammy Williams
Messages: 522
Registered: August 2010
Karma: -2
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https://silenthomehub.com/best-quiet-rv-air-conditioners/
On Thu, Sep 17, 2020 at 2:18 PM Larry Nelson via Gmclist <
gmclist@list.gmcnet.org> wrote:
> I just gave my old air conditioner a burial at sea and bought a Dometic
> 13.5 unit from my trusted, family owned RV supply house. I have installed
> these types of units before on my old bus conversion and also my
> houseboat. The issue with the old one was noise. You could hear it cycle in
> the
> cooling mode from the outside, very loud. Inside it was loud and also had
> a vibration that eventually subsided when the compressor kicked in.
>
> Bottom line: I didn't how good I had it. I hate this new Dometic. This
> thing directs the air mostly to the rear of the coach, no what combination
> of
> flaps and dampers you have open/closed. But the worse part is the noise.
> The neighbors should be happy but it is like trying to sleep with a
> lawnmower
> running in the living area. If that wasn't bad enough, a harmonic THRONG
> THRONG THRONG (sorry the best I can do to describe the repetitive noise and
> vibration) kicks in.
>
> What is the quietest rooftop air conditioner that you all have used. I
> don't want to throw away $1,000 but this thing is junk. Thanks.
>
> Larry
> --
> Larry Nelson Springfield, MO
> Ex GMC'er, then GM Busnut
> now '77 Eleganza ARS WB0JOT
>
> _______________________________________________
> 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 Air [message #358738 is a reply to message #358737] |
Thu, 17 September 2020 15:27 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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Hey Larry
I have the Coleman Mach 8 heat pump.
It works well. It’s loud, but tolerable on low settings.
A friend found one from Australia - Houghton Belaire 3400. It’s incredibly quiet.
Dolph Santorine
DE AD0LF
Wheeling, West Virginia
1977 ex-Palm Beach TZE167V100820
Howell EFI/EBL , Reaction Arms, Manny Transmission
> On Sep 17, 2020, at 3:29 PM, Sammy Williams via Gmclist wrote:
>
> https://silenthomehub.com/best-quiet-rv-air-conditioners/
>
>
>
>
>> On Thu, Sep 17, 2020 at 2:18 PM Larry Nelson via Gmclist > gmclist@list.gmcnet.org> wrote:
>>
>> I just gave my old air conditioner a burial at sea and bought a Dometic
>> 13.5 unit from my trusted, family owned RV supply house. I have installed
>> these types of units before on my old bus conversion and also my
>> houseboat. The issue with the old one was noise. You could hear it cycle in
>> the
>> cooling mode from the outside, very loud. Inside it was loud and also had
>> a vibration that eventually subsided when the compressor kicked in.
>>
>> Bottom line: I didn't how good I had it. I hate this new Dometic. This
>> thing directs the air mostly to the rear of the coach, no what combination
>> of
>> flaps and dampers you have open/closed. But the worse part is the noise.
>> The neighbors should be happy but it is like trying to sleep with a
>> lawnmower
>> running in the living area. If that wasn't bad enough, a harmonic THRONG
>> THRONG THRONG (sorry the best I can do to describe the repetitive noise and
>> vibration) kicks in.
>>
>> What is the quietest rooftop air conditioner that you all have used. I
>> don't want to throw away $1,000 but this thing is junk. Thanks.
>>
>> Larry
>> --
>> Larry Nelson Springfield, MO
>> Ex GMC'er, then GM Busnut
>> now '77 Eleganza ARS WB0JOT
>>
>> _______________________________________________
>> 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:
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| Re: [GMCnet] Rooftop Air [message #358740 is a reply to message #358738] |
Thu, 17 September 2020 16:44 |
Dave Stragand
Messages: 307
Registered: October 2017
Karma: 0
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Senior Member |
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The earlier Mach 8’s had a very loud fan (part number 1472B5041) on top that they have replaced with a quieter one (part number 1472D5041). Worth checking into. There are a lot of pages on the topic on Google.
-Dave
1978 Transmode near Pittsburgh
> On Sep 17, 2020, at 4:42 PM, Adolph Santorine via Gmclist wrote:
>
> Hey Larry
>
> I have the Coleman Mach 8 heat pump.
>
> It works well. It’s loud, but tolerable on low settings.
>
> A friend found one from Australia - Houghton Belaire 3400. It’s incredibly quiet.
>
>
> Dolph Santorine
>
> DE AD0LF
>
> Wheeling, West Virginia
>
> 1977 ex-Palm Beach TZE167V100820
> Howell EFI/EBL , Reaction Arms, Manny Transmission
>
>
>> On Sep 17, 2020, at 3:29 PM, Sammy Williams via Gmclist wrote:
>>
>> https://silenthomehub.com/best-quiet-rv-air-conditioners/
>>
>>
>>
>>
>>> On Thu, Sep 17, 2020 at 2:18 PM Larry Nelson via Gmclist >> gmclist@list.gmcnet.org> wrote:
>>>
>>> I just gave my old air conditioner a burial at sea and bought a Dometic
>>> 13.5 unit from my trusted, family owned RV supply house. I have installed
>>> these types of units before on my old bus conversion and also my
>>> houseboat. The issue with the old one was noise. You could hear it cycle in
>>> the
>>> cooling mode from the outside, very loud. Inside it was loud and also had
>>> a vibration that eventually subsided when the compressor kicked in.
>>>
>>> Bottom line: I didn't how good I had it. I hate this new Dometic. This
>>> thing directs the air mostly to the rear of the coach, no what combination
>>> of
>>> flaps and dampers you have open/closed. But the worse part is the noise.
>>> The neighbors should be happy but it is like trying to sleep with a
>>> lawnmower
>>> running in the living area. If that wasn't bad enough, a harmonic THRONG
>>> THRONG THRONG (sorry the best I can do to describe the repetitive noise and
>>> vibration) kicks in.
>>>
>>> What is the quietest rooftop air conditioner that you all have used. I
>>> don't want to throw away $1,000 but this thing is junk. Thanks.
>>>
>>> Larry
>>> --
>>> Larry Nelson Springfield, MO
>>> Ex GMC'er, then GM Busnut
>>> now '77 Eleganza ARS WB0JOT
>>>
>>> _______________________________________________
>>> 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
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1978 Transmode (403)
Pittsburgh, PA
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| Re: [GMCnet] Rooftop Air [message #358741 is a reply to message #358737] |
Thu, 17 September 2020 16:54 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Well, it is especially challenging to have a totally quiet running air
conditioner on top of what amounts to a huge aluminum beer can. Any
vibration will transmit much amplified harmonics directly below it. Fan
motors that run fast enough to move sufficient air volume to cool the coach
with all that glass volume is a tall order as well. Best we can do, is
place the unit on lots of soft foam, and hope to seal up all the water
leaks. Newer units are somewhat quieter, but are far from silent.
Sometimes, being hard of hearing is a good thing. Look at the decibel
ratings before you buy. Quality sometimes costs more. All I've got from
here.
Jim Hupy
Salem, Oregon
On Thu, Sep 17, 2020, 2:45 PM Dave Stragand via Gmclist <
gmclist@list.gmcnet.org> wrote:
> The earlier Mach 8’s had a very loud fan (part number 1472B5041) on top
> that they have replaced with a quieter one (part number 1472D5041). Worth
> checking into. There are a lot of pages on the topic on Google.
>
> -Dave
> 1978 Transmode near Pittsburgh
>
>> On Sep 17, 2020, at 4:42 PM, Adolph Santorine via Gmclist gmclist@list.gmcnet.org> wrote:
>>
>> Hey Larry
>>
>> I have the Coleman Mach 8 heat pump.
>>
>> It works well. It’s loud, but tolerable on low settings.
>>
>> A friend found one from Australia - Houghton Belaire 3400. It’s
> incredibly quiet.
>>
>>
>> Dolph Santorine
>>
>> DE AD0LF
>>
>> Wheeling, West Virginia
>>
>> 1977 ex-Palm Beach TZE167V100820
>> Howell EFI/EBL , Reaction Arms, Manny Transmission
>>
>>
>>> On Sep 17, 2020, at 3:29 PM, Sammy Williams via Gmclist gmclist@list.gmcnet.org> wrote:
>>>
>>> https://silenthomehub.com/best-quiet-rv-air-conditioners/
>>>
>>>
>>>
>>>
>>>> On Thu, Sep 17, 2020 at 2:18 PM Larry Nelson via Gmclist >>> gmclist@list.gmcnet.org> wrote:
>>>>
>>>> I just gave my old air conditioner a burial at sea and bought a Dometic
>>>> 13.5 unit from my trusted, family owned RV supply house. I have
> installed
>>>> these types of units before on my old bus conversion and also my
>>>> houseboat. The issue with the old one was noise. You could hear it
> cycle in
>>>> the
>>>> cooling mode from the outside, very loud. Inside it was loud and also
> had
>>>> a vibration that eventually subsided when the compressor kicked in.
>>>>
>>>> Bottom line: I didn't how good I had it. I hate this new Dometic. This
>>>> thing directs the air mostly to the rear of the coach, no what
> combination
>>>> of
>>>> flaps and dampers you have open/closed. But the worse part is the
> noise.
>>>> The neighbors should be happy but it is like trying to sleep with a
>>>> lawnmower
>>>> running in the living area. If that wasn't bad enough, a harmonic
> THRONG
>>>> THRONG THRONG (sorry the best I can do to describe the repetitive
> noise and
>>>> vibration) kicks in.
>>>>
>>>> What is the quietest rooftop air conditioner that you all have used. I
>>>> don't want to throw away $1,000 but this thing is junk. Thanks.
>>>>
>>>> Larry
>>>> --
>>>> Larry Nelson Springfield, MO
>>>> Ex GMC'er, then GM Busnut
>>>> now '77 Eleganza ARS WB0JOT
>>>>
>>>> _______________________________________________
>>>> 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: Rooftop Air [message #358748 is a reply to message #358736] |
Thu, 17 September 2020 18:38 |
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SteveW
Messages: 538
Registered: June 2005
Location: Southern California - Ora...
Karma: 1
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Senior Member |
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Hey Dolph -
Check this out:
https://www.youtube.com/watch?v=vhoTdLHkniw
I'm in the process of putting it on my Mach8. I've only replaced the fan so far and it helped. I'm really expecting the shroud on the top of it will make a large difference too...
And of course slowing that fan down will make a contribution to reducing the noise level.
Steve W
Southern California
Steve W
1973 : 23'
Southern California
[Updated on: Thu, 17 September 2020 18:55] Report message to a moderator |
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| Re: Rooftop Air [message #358755 is a reply to message #358736] |
Thu, 17 September 2020 21:06 |
Scott Nutter
Messages: 782
Registered: January 2015
Location: Houston/San Diego
Karma: 4
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Senior Member |
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My Atwood aircommander has ALWAYS been my favorite AC on my coach. Quiet, reliable, Quiet, 3 speeds, Quiet, and it’s also Quiet!!!
My rear is a Coleman mach 8 15k that is loud. The Coleman is a good unit but it is loud..... not just the outside cooling fan, but also when the compressor kicks on.....
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: Fri, 18 September 2020 03:36] Report message to a moderator |
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