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Old 12-05-2009, 11:17 AM   #1
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Smoke/Carbon Monixide Placement Code


Where, oh where, in the NEC are the codes for this. I probably should have more patience trying to find 'em.

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Old 12-05-2009, 11:19 AM   #2
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Smoke/Carbon Monixide Placement Code


Not in the NEC, usually found in your statewide uniform building code.

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Old 12-05-2009, 11:28 AM   #3
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Smoke/Carbon Monixide Placement Code


Rats - was afraid of that. I see it's in the IRC, but I'm in Michigan.
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Old 12-05-2009, 11:34 AM   #4
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Smoke/Carbon Monixide Placement Code


Here, smokes need to be in each bedroom and an area outside each bedroom, on each level of the house, no less than 12" from corners of walls/ceilings, no less than 3' of hvac ducts, registers, etc., no less than 3' from a vaulted ceiling's peak .
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Old 12-05-2009, 11:40 AM   #5
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Smoke/Carbon Monixide Placement Code


Thanks guys. I was looking specifically for stairwells and whether you had to have a combo unit at the furnace (gas, of course). Been trying for days to get the local inspector from a small town to call me back.
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Old 12-05-2009, 11:40 AM   #6
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Smoke/Carbon Monixide Placement Code


Here we also need a CO detector on each floor
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Old 12-05-2009, 01:59 PM   #7
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Smoke/Carbon Monixide Placement Code


The COs that I have seen say not to mount near a gas burning appliance. CO is about the same density as air so placement is not critical heigthwise.
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Old 12-05-2009, 04:31 PM   #8
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Smoke/Carbon Monixide Placement Code


Instructions say not to mount above a fuel burning appliance as even a furnace creates a small amount of co on startup. Fifteen feet away seems to be the average answer. Regardless, the recommendation appears to be one on every floor or at least one within ten feet of bedrooms. I can't seem to find the actual code though (if it exists.) I'm almost certain that I had read that one was required in furnace rooms.
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Old 12-05-2009, 04:38 PM   #9
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Smoke/Carbon Monixide Placement Code


I've never heard of one required in a furnace room
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Old 12-05-2009, 05:37 PM   #10
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Smoke/Carbon Monixide Placement Code


I could easily be wrong. I travel a lot and hear all kinds of things from do-it-yourselfer's to journeymen to inspectors, and it all kind of gets garbled if I didn't check actual codes, and opinions suddenly become "facts." This seems to be one of those areas that is not overly defined. For instance, I find that you ought not to put one these within 12" of a corner because the co can swirl in the corner and not set the thing off. Is that in the code? I don't think so unless it's under the general heading of "manufacturer's instructions to be followed."
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Old 12-05-2009, 05:52 PM   #11
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Smoke/Carbon Monixide Placement Code


Actually a corner & within 4" of a wall are considered dead areas
Lower circulation & air movement
Of course that can depend upon the room, if forced hot air heat - returns & registers, location of radiators etc



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Old 12-05-2009, 07:18 PM   #12
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Smoke/Carbon Monixide Placement Code


This is excellent stuff. Can I ask where you got it?
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Old 12-05-2009, 07:30 PM   #13
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Smoke/Carbon Monixide Placement Code


I just did a quick search on the internet I think it was :

{ smoke detector placement 4" }

I have all of mine on the ceiling
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Old 12-05-2009, 09:04 PM   #14
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Smoke/Carbon Monixide Placement Code


You better check you local regulations. I was just looking into this stuff and wound up buying new detectors. All I had were ionization detectors with a couple ion/co detectors. There's some controversy since the ionization detectors take a long time to pick up on smouldering fires. Several states and/or communities are changing requirements to require photo-electric or photo/ion combos. They also have co regs. It seems to be a trend, so check it out.

I'm in the process of replacing my 6 hardwired detectors with photo/ion combos and adding hardwired co detectors in the basement, 1st and 2nd floors. They are interconnected and give you a warning of beeps of two different patterns for fire or co on every unit. The co detectors have an lcd screen that gives you info.
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Old 12-06-2009, 02:45 PM   #15
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Smoke/Carbon Monixide Placement Code


Quote:
Originally Posted by Jim Port View Post
The COs that I have seen say not to mount near a gas burning appliance. CO is about the same density as air so placement is not critical heigthwise.
That is absolutley wrong wrong wrong. I am a firefighter/EMT with HAZMAT Operations certification. CO will RISE. It is lighter than air, granted it is not much lighter with a relative gas density (as compaired to room air) of 0.97. Install them closer to the ceiling as that is where it will collect first. As a side note there are only a handfull of gases that will rise. Most gases will in fact sink to the low areas.

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Last edited by Pudge565; 12-06-2009 at 02:53 PM. Reason: Added relative gas density
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