[dd251] Re: and Water Mist Systems

From: "Gill, Chris" <GillC@xxxxxxxxx>
To: "'dd251@xxxxxxxxxxxxx'" <dd251@xxxxxxxxxxxxx>
Date: Wed, 29 Jan 2003 11:34:00 -0000
Dear all

There has been a great deal of discussion on this forum on the subject of
using water mist in residential/domestic properties and we'd like to bring a
few items to the table:

a) The government in this country has contracted BRE to carry out research
into DD251 and DD252 specifically aimed at looking at the applicability of
sprinkler protection for residential and domestic properties.  Given this
and the fact that a great deal more is known about sprinkler protection than
water mist, we do feel that advocating water mist AT THIS STAGE is perhaps
putting the cart before the horse.

b) Regardless of whether water mist is pumped or pressurised from a
cylinder, the equipment needs to be properly tested and ideally, maintained.
Whilst other fire equipment for use in such properties is not maintained as
a whole it has however been thoroughly tested and approved.  Where water
mist is being installed, what confidence can the supplier give to the user
that in years to come the equipment will function?  

c) There is no doubt that water mist has its advantages but these are still
being discovered and quantified.  Currently the technology is very
application specific and has yet to be proven in 'generic' situations which
domestic and residential occupancies are.  Water mist is more susceptible to
risk variables such as ventilation and room geometry and these aspects are
still being investigated.


This is an interesting debate and no doubt it will run for some time.

Regards,

Chris Gill
Technical Manager
For and on behalf of, LPCB


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[dd251] Re: and Water Mist Systems

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