Bruce,


They don’t make a Duct detector that is listed for area of protection.   Also 
our other major concern.





Michael Goodis

Estimator, Project Manager

IL#000635   NICET#135586

Key Fire Protection Enterprises LLC

3200 Mike Padgett HWY

Augusta, GA 30906

Office- (706)790-3473

Cell- (706) 220-8822

Fax: (706) 738-2119





From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On 
Behalf Of Bruce Verhei
Sent: Tuesday, September 20, 2016 11:01 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: Re: Pre-action detection



Guess I'll be the angel's advocate. Is the duct detector listed for area 
coverage?



That said, I think (51%) that a detector in the exhaust from each one-person 
cell was used as the detection for such a system in Kent WA. I was not the plan 
reviewer for this project so I am not sure.



Operator is King Co. Constructed as King County Regional Justice Center, 
renamed Norm Maleng Regional Justice Center. I don't have a current contact.



Best



Bruce Verhei


On Sep 20, 2016, at 07:04, <craig.pr...@ch2m.com> <craig.pr...@ch2m.com> wrote:

Playing devil’s advocate here for a minute, how does the duct detector differ 
from a room detector with regards to its listing for this application?



How does a duct detector sensing room smoke conditions differ from a VESDA 
system which samples air from a room?



Does the HVAC unit serve only the same area as the preaction system covers?



Is there specific verbiage cited within NFPA 13 or NFPA 72 which does not allow 
the use of an HVAC return air smoke detector as an initiating device for a 
preaction system?




Craig L. Prahl
Fire Protection Group Lead/SME
CH2M
200 Verdae Blvd.
Greenville, SC  29607
Direct - 864.920.7540

Fax - 864.920.7129

CH2MHILL Extension  77540
craig.pr...@ch2m.com





From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On 
Behalf Of Gregg Key
Sent: Tuesday, September 20, 2016 9:28 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: Pre-action detection [EXTERNAL]



Greetings,



                              First of all, what a great convention. Good 
speakers and fellowship. Nashville was awesome as well. I am in serious need of 
some technical assistance. I have posted this a few times with some response 
but this has become a three ring circus between the architect ,fire marshal and 
us . The Architect specified a double interlock pre-action system with the 
detection being provided with a duct detector in the return duct at the unit. 
We have refused to certify the system due the fact that the detector not being 
listed for this application. State is asking me to hang a partial certification 
( yellow tag) . has anyone else dealt with this detection being used for a 
pre-action system in a detention center?   Any help would be appreciated



Gregg Key

General Manager

Key Fire Protection Enterprises,LLC

3200 Mike Padgett Hwy

Augusta GA, 30906

O-706-790-3473

C- 706-220-8821

F- 706-738-2119

gr...@keyfps.com





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