Air Conditioning in Conservatory

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Have a conservatory approx 4m x 3m and am dreading the heat it will generate this coming summer. I'm considering installing air conditioning but wonder what is the best option both on price and running costs and where I may get it. Also any alternatives to air conditioning.
Any constructive suggestions and recommendations would be appreciated - leaving the windows and doors open or using a cooling fan just doesnt work.
Many thanks
Alan
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There is no air conditioning that isn't noisy.
| Have a conservatory approx 4m x 3m and am dreading the heat it will generate | this coming summer. I'm considering installing air conditioning but wonder | what is the best option both on price and running costs and where I may get | it. Also any alternatives to air conditioning. | | Any constructive suggestions and recommendations would be appreciated - | leaving the windows and doors open or using a cooling fan just doesnt work. | | Many thanks | | Alan | |
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Where on earth did you that tosh from?
Cheers
Richard
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r.bartlett wrote:

Air has a low Specific heat capacity of around 1 joule per degree Kelvin per kilogram. Or (very roughly) 1 joule per degree C per cubic metre. So removing significant amounts of heat energy by using air is bound to involve substantial air flow. Forced generation of airflow using aerofoils (fan blades) inevitably involves pressure discontinuities and such discontinuites propogate transverse pressure waves at audible frequencies(and others). These pressure waves impact on audio receptors and are perceived as noise.
Thus, there is no air conditioning that isn't noisy. That is, of course, defining "air conditioning" as plant designed to remove heat by using forced air as the transfer fluid..
The equipment may be remote from the space being cooled but will still produce noise.
--
Sue












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Thank you, just as I said, only better put so that the more ignorant amongst us will now see (and hear) that air conditioning is always noisy.
| > | >>There is no air conditioning that isn't noisy. | >> | > | > | > Where on earth did you that tosh from? | > | Air has a low Specific heat capacity of around 1 joule per degree Kelvin | per kilogram. Or (very roughly) 1 joule per degree C per cubic metre. So | removing significant amounts of heat energy by using air is bound to | involve substantial air flow. Forced generation of airflow using | aerofoils (fan blades) inevitably involves pressure discontinuities and | such discontinuites propogate transverse pressure waves at audible | frequencies(and others). These pressure waves impact on audio receptors | and are perceived as noise. | | Thus, there is no air conditioning that isn't noisy. That is, of course, | defining "air conditioning" as plant designed to remove heat by using | forced air as the transfer fluid.. | | The equipment may be remote from the space being cooled but will still | produce noise. | | -- | Sue | | | | | | | | | | |
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A quiet bedroom has a db rating of 35 whilst a 'decent' air conditioning unit has a rating of 21 db
Therefore when moving it produces 'noise' -in the same way as say an ant walking along a pathway one would presume- it is not nor could be considered within it's expected operating environment 'noisy'...
Thus your explanation lacks context and hence would be marked down accordingly as "must try harder."
Cheers
Richard
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r.bartlett wrote:

I assume that mean dB?
Care to post some links to those with this sort of rating? A quick google search gave me, 55dB, 49.5dB, 42dB, 52dB, 59dB as being more typical.
--
Sue



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Wow, how anal can you get???

That's because you're not quite as smart as you'd possibly like to believe......
Here's one quickly from a 'decent' manufacturer-
Sound Level Cooling Sound Power High dBA 56.0 Sound Pressure High dBA 38.0 Medium dBA 32.0 Low dBA 25.0 Silent Operation dBA 22.0
Now get back in the kitchen where you belong...
Cheers
Richard
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r.bartlett wrote:

And the heat transfer rating at anything other than "High" is? The "decent" one that I looked at reduced from 10000BTU on "high" to 520 BTU on "silent".
So there we have it. The air con is a lot quieter if, yes, it isn't actually doing any significant work..
--
Sue

















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"Thus, there is no air conditioning that isn't noisy. That is, of course, defining "air conditioning" as plant designed to remove heat by using forced air as the transfer fluid.."
I simply used your definition of 'air conditioning' and found you were obviously wrong. So whilst you may now try to move the goal posts sadly you were wrong and been proved wrong.
In the real world 'decent' air conditioners will give more than adequate duty whilst offering a near silent operation. There are two ways of operating these systems.
1) Run on high or medium for about 1 hour before retiring THEN dropping down to 'silent' mode 2) Leave continuously on low or 'silent' mode during the hot spell.
The duty naturally drops during the night anyway so the performance drop off matches demand. Most people only need a few degrees off + the drop in humidity to get a satisfactory nights slumber..
Cheers
Richard
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r.bartlett wrote:

By your words above, you have merely proved the point that aircon is indeed noisy. If it wasn't noisy, there would be no need to adopt either of your strategies above - both intended to reduce the noise when the room is occupied (at the expense of increased running costs including cooling an unoccupied room).
The goal posts haven't been moved by me. The answer to "is aircon still noisy when there is no one there to hear it?" is, yes, it is.
"There isn't any aircon that isn't noisy" is perfectly true. Even the "decent" one you suggested puts out 50+ dB when on full. Which is "noisy" in most people's books.
--
Sue









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What's the cooling capacity by 22dBa ???? one quarter ?

I wonder who belongs in the kitchen, there is hardly any fan who can deliver air with that noise rating...
Theo
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Theo van Riet wrote:

Nothing wrong with being in the kitchen.
It would be heck of a lot quieter there, than the bedroom with the aircon working, for a start. And a lot cooler, if it wasn't..
--
Sue

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One per unit is suffice-how many do you want?
Cheers
Richard
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I need 600 in a project, but will require proven and thrustworthy caracteristics before ordering.
Theo
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wrote:

All tested and approved to Eurovent standards
http://www.eurovent-certification.com/en/Programmes/Programme_Descriptions.php
Cheers
Richard
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Link doesn't work Theo
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Theo van Riet wrote:

Dorothy in u.a.computer does a 25cfm fan with 21dBA. Which is exceptionally good.
--
Sue






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r.bartlett wrote:

Yes but 21dB when not doing anything very much useful. Besides even on 21 dB it would increase the noise level in a bedroom to 56db, decibels adding up as I'm sure you are aware.
--
Malc
You will pay for your sins. If you have already paid, please disregard
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I disagree on both counts. Noise is not a simple matter of adding up the ratings to get a total. There are many factors involved and there may well be some destructive interference to counter the overall effect.
The other point has been covered.
Either way real world tests have shown on many many occasions that 'decent' air conditioning gives better control in a bedroom situation of both temperature and noise sufficient to give more than satisfactory operation than the DIY sheds could ever dream of...
Cheers
Richard
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