[MHml] Air vloume required

[Rob Denney]

G'day,

Thanks for this and the other posts.  Looks like 12,500 sq mm for one
person.   Plan is to leave the windward end of the beams open and have
cutouts in the section that is inside the hull.   Beams are  150mm/6" square
so 2 openings of 22,500 sq mm should be plenty, particularly as it will
always be blowing if the hull is closed up.

regards,

Rob
----- Original Message ----- 
From: "S Fishwick" <Fishwick at compuserve.com>
To: <multihulls at steamradio.com>
Sent: Sunday, October 29, 2006 5:56 AM
Subject: Re: [MHml] Air vloume required


> -----Original Message-----
> On: Fri, 27 Oct 2006 20:02:11 +0800
> Wrote: "Rob Denney" <proa at iinet.net.au>
> >
> > I am designing a solo race boat which will have a closed
> > hatchway.  I need
> > to provide sufficient air for the occupant while he/she sleeps.
> >
> > Does anybody know how much air is required by a sleeping person?
> >
>
> Offhand no, although I worked out once how much the CO2 and temperature
> levels would rise in in an operations room when the forced ventilation
> failed. IIRC there was a lot of volume per person (room height was
> around 10m) and we got only a couple of hours!
>
> For what it's worth, UK building regs appear to require 25000 sqmm (say
> 40 sqin) vents in a small bedroom (albeit for two people). I would have
> thought that a sealable vent or two vent was a better choice than a
> hermetically sealed box as it gives the option of riding out bad weather
> below indefinitely.
>
> JMHO
> Simon
>
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