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Thread: extract fan size
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03-03-2010, 05:39 AM #1
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extract fan size
Can someone help me, how to calculate the extract fan size? I googled. Got different input.
One method is room volume divided by air change
2nd method is room volume multiply to 1.5.
Both are entirely different. Which is correct?
Moideen-Dubai
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03-03-2010, 07:20 AM #2
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Re: extract fan size
Volume x air change rate = fan
room 6m x 8m x 2.7m = 129.6 m3
6 AC/hr is therefore 6 x 129.6 = 777.6m3/hr
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03-03-2010, 11:30 AM #3
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Re: extract fan size
thanks for replay.getting defferent info from this site.
Originally Posted by eggs
http://www.alpinefan.com/alpineair_vent_calc.php.
expecting your commentLast edited by chillin out; 05-03-2010 at 09:08 PM.
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03-03-2010, 04:38 PM #4
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Re: extract fan size
Oh, ok then. That's that................ Originally Posted by moideen
Eggs
<< Eggs walks off confused, playing with his calculator wondering what the sarcastic roll eyes is all about >>Last edited by chillin out; 05-03-2010 at 09:08 PM.
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03-03-2010, 06:32 PM #5
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Re: extract fan size
Hi eggs hardly worth the bother at times Originally Posted by eggs
TooshMy wife used to say you never listen to a word I say at least I think that what she said
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03-03-2010, 07:33 PM #6
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Re: extract fan size
As he's not a native English speaker, could this have been lost in transition??
maybe the guy didn't mean anything untoward??
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04-03-2010, 04:44 AM #7
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Re: extract fan size
sorry eggs.i didnt mean any harassing.if i hurt you,sorry again. Originally Posted by eggs
Moideen-dubai
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05-03-2010, 03:15 AM #8
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Re: extract fan size
moideen ,thanks for this site.
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05-03-2010, 10:27 AM #9
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Re: extract fan size
Hi Moideen,
There is something confusing in the chart on that web site.
They are working by how many minuets it takes for an 1 air change.
If I use their example, then it is 15 times an hour.
It is actually the same as the distinguished member eggs said but from another angel.
My personal opinion is that to change air in a room, it is better to push air inside then to extract it.
In simple words, the size of the extracting fan is:
Volume of the room X times of air changes per hour = capacity of fan.
Remember to look at Db of noise when you look at the fan's curve.
Good luck.Last edited by chemi-cool; 05-03-2010 at 10:29 AM.
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