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Heat Detectors #39980 07/10/04 08:55 AM
Joined: Dec 2003
Posts: 524
Attic Rat Offline OP
Member
...I am required to install a heat detector in the attic,because there is a gas-fed furnace/air handler up there,..and there are no gable fans,just vents...My supply house carries BRK,and sells a rate of rise detector thats compatible with the a/c-battery back-up smokes,but for only up to 135 degrees F...An attic could easily attain this temperature on a sweltering summer day.Then it'll set the whole system off with false alarms,...if I "kit-bash" and use another brand of heat detector that has a higher temperature,I void the UL listing on the device.What should I do???
Russ


.."if it ain't fixed,don't break it...call a Licensed Electrician"
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Re: Heat Detectors #39981 07/10/04 09:11 AM
Joined: Mar 2002
Posts: 582
R
Ron Offline
Member
Why is a heat detector required?
If detection is required, then a smoke is generally in order. A heat detector is not considered a life safety device.


Ron
Re: Heat Detectors #39982 07/11/04 09:35 AM
Joined: Dec 2003
Posts: 524
Attic Rat Offline OP
Member
... Beats me,Ron, all I know is that the Fire Official from the town wants a "Red-Eye" up there,which is a rate of rise heat detector..in line with the other line voltage smokes throughout the house.He wants combo carbon monoxide/smokes in all common areas on each level of the house as well.I asked him whether he prefers ionization as opposed to photo-electric,and he said photo-electric type.I have a smoke in the basement,a combo in the 1st floor common area outside(within 10')of the bedrooms,and a smoke in each bedroom,of which there are 2.On the 2nd floor,I have a smoke at the top of the stairway landing,as well as a combo in the hall area between the 2 bedrooms,and one smoke in each bedroom.The attic with the furnace/blower has to get the "Red-Eye"..or heat detector.
Russ


.."if it ain't fixed,don't break it...call a Licensed Electrician"
Re: Heat Detectors #39983 07/11/04 09:49 AM
Joined: Jun 2003
Posts: 681
P
PCBelarge Offline
Member
Here are some thoughts.
NFPA 72
11.8.3.5 Specific Locations.
(2) Smoke alarms and smoke detectors shall not be located within unfinished attics or garages or in other spaces where temperatures can fall below 4 degrees C(40 degrees F) or exceed 38 degrees C(100degrees F). So if your attic reaches temperatures greater than 100 degrees F, no smokes.

Do you notice how it states smoke alarms and smoke detectors?
smoke alarms are what most electricians and homeowners install. The definition of smoke alarm and smoke detector are in NFPA 72.

Smoke detectors have to be connected to an alarm panel, smoke alarms are 'stand alone' units.

Pierre


Pierre Belarge
Re: Heat Detectors #39984 07/11/04 10:03 AM
Joined: Dec 2003
Posts: 524
Attic Rat Offline OP
Member
... So, the inter-connected,line voltage,battery back-up units are considered "stand alone"??..this is what type I'm referring to.. [Linked Image from getzfire.com]
The box reads "BRK smoke detector"
I'm confused..on the wording here.
Thanx,
Russ


.."if it ain't fixed,don't break it...call a Licensed Electrician"
Re: Heat Detectors #39985 07/11/04 10:17 AM
Joined: Jun 2003
Posts: 681
P
PCBelarge Offline
Member
What I meant by stand alone, is the battery units that are not feed by a system or from the electrical panel.
If you want, I will post the two different definitions.
Those line voltage interconnected units that you show are not considered 'smoke detectors', they are 'smoke alarms'.

Pierre


Pierre Belarge
Re: Heat Detectors #39986 07/11/04 10:21 AM
Joined: Dec 2003
Posts: 524
Attic Rat Offline OP
Member
...Oh,I see,
Thanx for the help,Pierre [Linked Image] [Linked Image]
My issue of the NFPA 72 is from 1999,back from when I took my exam,..it doesn't have a Chapter 11,it only goes up to Ch.9,then it goes to the Appendix,I'm gonna try and get me a later issue.
Russ



[This message has been edited by Attic Rat (edited 07-11-2004).]


.."if it ain't fixed,don't break it...call a Licensed Electrician"

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