On 1/23/2012 5:53 PM, Jim Henderson wrote:
> On Mon, 23 Jan 2012 12:22:44 -0500, Aydan wrote:
>
>> Invisible<voi### [at] devnull>  wrote:
>>> Actually, going back to my previous point: The amount of /moisture/
>>> emitted by a normal human is absurdly small. And yet, put enough of
>>> them in a room, and it can get astonishingly moist in there! o_O
>>
>> I just had a look in Wikipedia:
>> 1m³ of air at 20 can carry roughly 30ml of water (as vapour).
>> 1 human sweats about 400ml to 1l per day.
>> Since "normal" room air usualy has about 50% humidity that leaves about
>> 15ml/m² for the sweat. That would mean 1 human can saturate 1 - 2.5 m³
>> of air per hour.
>> Now you just need the number of people and the size of the room to know
>> how fast it saturates.
>
> You'd also need to know the current relative humidity to know how
> saturated it is before you start adding people to the room.
>
> 0% humidity is quite rare - in fact, I don't know that it's possible on
> Earth other than in an artificial environment.  I live in a desert
> climate (though not in the desert), and while we do easily hit below 20%
> relative humidity, we don't hit 0.  (In fact, it's snowing right now)
>
> Jim
Cave system near here is.. damn close. Was going to be used as a bomb 
shelter, by the government, but, frankly, they would have had to store 
20 times the water they still have down there to survive it. You can 
definitely tell there is next to no water in the air while there.

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