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| Get my pies outta the oven!  |
I decided to replace my Kidde AA battery CO units with the 10 year sealed lithium battery units and wanted to see what the consensus is for mounting height? Seems like it’s all over the place depending on where you look. Some sites say they should be low other sites say they should be up higher? Mine are all currently about 6 feet high from floor level and I’m wondering if I need to reevaluate here and mount the new ones lower? What does the Forum like for mounting height? As these are not plug-in, I’m not limited to where a plug is. Thanks! | ||
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| Staring back from the abyss  |
CO is lighter than O2. I keep mine in the ceiling. Been happy and ain't dead yet.  I don't think..________________________________________________________ It is long past time for a Convention of States. The Founding Fathers gave us this tool to fix an out of control government and we need to use it. | |||
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| Partial dichotomy |
All mine are on the ceiling. SIGforum: For all your needs! Imagine our influence if every gun owner in America was an NRA member! Click the box>>>  | |||
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Honky Lips |
High enough not to hit my head, low enough to not need a ladder. _____________________________________________ Proverbs 3:31 "Envy thou not the oppressor, and choose none of his ways." | |||
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| Member |
It makes no difference per: https://support.firstalert.com...fire%20extinguishers. __________________________________________________ If you can't dazzle them with brilliance, baffle them with bullshit! Sigs Owned - A Bunch | |||
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| Savor the limelight |
Nitrogen is lighter than oxygen, but rather than float away, it stays mixed. Carbon Monoxide does the same. | |||
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blame canada |
We don't have any mounted on ceilings. Our current residence has low ceilings (7'). We have several gas detectors and monitors mounted horizontally on wall recepticles, and a vertical smoke/co2 deterctor up close to the ceiling in each bedroom. More than one per room... we have four natural gas appliances in our house. The failure rate on all of them has been high. None seem to last more than a few years. None have made it to their 5 year life without faulting. ~~~~~~~~~~~~~~~~~~~~~~~~~ "The trouble with our Liberal friends...is not that they're ignorant, it's just that they know so much that isn't so." Ronald Reagan, 1964 ~~~~~~~~~~~~~~~~~~~~~~~~~~ "Arguing with some people is like playing chess with a pigeon. It doesn't matter how good I am at chess, the pigeon will just take a shit on the board, strut around knocking over all the pieces and act like it won.. and in some cases it will insult you at the same time." DevlDogs55, 2014 ~~~~~~~~~~~~~~~~~~~~~~~~~~ | |||
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Member |
Was several years ago but... When I added on to my house including an attached garage adjoining a bedroom the electrical code enforcer told me it did not matter as It expands to fill the space. He said even behind furniture was acceptable... but visible to see the function / fault pilot lights was much preferred. He even went as far as allowing a plug-in unit, as in not hard wired! Some people spread happiness wherever they go… some whenever they go. | |||
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| Member |
Per the NFPA it doesn't matter. As a chemical matter CO is slightly lighter than the atmosphere. What I tell people as a FF is its more important that you can read the detector display than any other factor. On my own I would put them at breathing heights as that's what actually matters and houses have very odd air currents. But at a practical level you probably have AC powered ones and outlets are at floor level. I would make no effort to get them up high. “So in war, the way is to avoid what is strong, and strike at what is weak.” | |||
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Legalize the Constitution |
I was just reading yesterday that the alarm point for most CO detectors is much too high, IIRC, 70 ppm. The article was from a company that manufactures and sells detectors that alarm at any level of CO detected. It’s in their self interest to scare you, but it’s got me thinking, I saved the link. _______________________________________________________ despite them | |||
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| In the yahd, not too fah from the cah  |
For all intents and purposes, CO is close enough to the weight of air that it doesn't matter really where you put the alarm. Most people use the combo smoke/CO units that mount to the ceiling. You can also use a plug in version which obviously will be closer to the floor. It doesn't really matter. I wouldn't stress over CO alarms sounding at 70PPM. The OSHA permissible exposure limit for an 8 hour workday is 50PPM. If they were set any lower, you'd likely get a lot of nuisance alarms. | |||
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| If you see me running try to keep up  |
The fact that CO is lighter than air was always used as a reason to mount them ground level. As has been stated, I think where you have them is fine. In an industrial environment where NFPA and other rules apply, we have them around eye level. All monitors worn on the person are close to head level where the gas would be inhaled. I think in a home there is enough turbulent flow of air that it would be picked up in most areas no matter where the CO detector was mounted. I put one near my HVAC air return and also at ground and eye levels. | |||
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Truth Seeker |
I have multiple normal smoke detectors installed by the home builder and they are on the wall close to the ceiling. I have one Carbon Monoxide detector and it was installed by my alarm system company and they put it on the ceiling and I think my ceilings are 10’. I had it go off once ever when we had no power or water for a week in a rare Texas snowstorm. I was melting snow in a big pot on a gas stove to fill toilets to flush and eventually it sounded the alarm so I quickly stopped. NRA Benefactor Life Member | |||
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| Was that you or the dog?  |
While most sources say it doesn't matter most deaths occur when sleeping. That is why I have always mounted them at pillow height. ___________________________ "Opinions vary" -Dalton | |||
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| Member |
Many years ago the fire Marshal in Sun City ,az told me , In a room with an 8 ft. Ceiling , no higher than 48 inches high. But it took him 20 minutes to check Books and manuals. Safety, Situational Awareness and proficiency. Neck Ties, Hats and ammo brass, Never ,ever touch'em w/o asking first | |||
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| Member |
Since I opened this thread, I have gotten several ads regarding smoke/CO detectors which doesn't surprise me with all the algorithms running in the background. One of them has been somewhat sensational regarding having a readout to show the level of saturation of CO. It makes an issue of the non readout trigger level being high enough one could be impaired before the alarm sounds. Would this be a legitimate concern or jus sensationalism? I have been considering replacement of my detectors and prefer to get what is the safer option if it is of actual value. It may be a gimmick as how often would one actually check the display but then again it could give earlier notice of a slowly rising or intermittent level of a small leak. The “POLICE" Their job Is To Save Your Ass, Not Kiss It The muzzle end of a .45 pretty much says "go away" in any language - Clint Smith | |||
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| If you see me running try to keep up |
My question would be how you would verify long term calibration at ppm. We calibrate our monitors at work monthly and usually they do drift some and need adjustment. I am sure ours are much more expensive and made of better quality than residential so I would personally ignore that. I doubt it would be accurate very long if it even was to begin with. | |||
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