| 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:
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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
>>>>
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