Ron, you made me get my copy of NFPA 17 A-2009. There is no mention of
changes to duct protection. But there is a reference to UL 300 - 2005. Is
that the most current UL 300?
Douglas Hicks
General Fire Equipment Co of Eastern Oregon, Inc
----- Original Message -----
From: "Ron Greenman" <[email protected]>
To: <[email protected]>
Sent: Saturday, January 24, 2009 9:45 AM
Subject: Re: Calculating sprinklers in horizontal grease ducts
Douglas,
I'm aware of that but in this installation the horizontal length of
the duct exceeds the new UL requirements pertaining to the length of
horizontal ducting which may be protected by a UL 300 compliant
chemical system, hence the sprinklers in the horizontal ducting. Still
need some calculation guidelines. The only I can find even close is
for non-materials handling ductwork, i.e.: extraction ducts, is for
hazardous chemical vapors in the IFC and I don't think that this
applies.
On Sat, Jan 24, 2009 at 8:15 AM, douglas hicks <[email protected]> wrote:
Is this a new install? A new install would, depending on local and state
and AHJ and insurance requirements call for a UL 300 suppression system.
Or
are you concerned about an existing system?
Douglas Hicks
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Ron Greenman
at home....
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