Bob Wood wrote: > On Thursday, September 28, 2006 7:06 PM [GMT+1=CET], > Captain Beeky <[EMAIL PROTECTED]> wrote: > > >> Is CO heavier than air ? >> >> Let me get this right - smoke detector better mounted ceiling level. >> Gas detector better mounted floor level. Where to put the CO >> detector, ideally ? > > > From: http://chemistry.about.com/library/weekly/aa092202a.htm > > Where Should I Place a Carbon Monoxide Detector? > > Because carbon monoxide is slightly lighter than air and also because > it may be found with warm, rising air, detectors should be placed on > a wall about 5 feet above the floor. The detector may be placed on > the ceiling. Do not place the detector right next to or over a > fireplace or flame-producing appliance. Keep the detector out of the > way of pets and children. Each floor needs a separate detector. If > you getting a single carbon monoxide detector, place it near the > sleeping area and make certain the alarm is loud enough to wake you > up.
Sounds spot on advice to me. Density is proportional to molecular weight for a gas Nitrogen = 28 Oxygen = 32 Air is therefore 4 parts N2 and 1 part O2 = approx 29 effective CO = 28 CO2 = 44 So CO tends to rise (and warm air rises as well). Our CO detector is 12" below ceiling. Ron Jones Process Safety & Development Specialist Don't repeat history, unreported chemical lab/plant near missesa at http://www.crhf.org.uk Only two things are certain: The universe and human stupidity; and I'm not certain about the universe. ~ Albert Einstein Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/canals-list/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/canals-list/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
