TM

2008 National Comfort Institute, Inc.

1-4ppm Normallevelsinhumantissuesproducedby body.

3-7ppm 6%increaseintherateofadmissionin hospitalsofnon-elderlyforasthma. (Sheppard-1999)

5-6ppm Significantriskoflowbirthrateifexposed duringlasttrimester(Ritz&Yu-1999)

5ppm 1stvisualdisplayonNSI3000LowLevel COMonitor

9ppm ASHRAEstandardforallowablespillagefrom ventedappliances,indoors,for8hours exposuredaily.EPAstandardforoutdoorsfor 8hoursandamaximum3timesperyear. (CleanAirAct)

10ppm OutdoorlevelofCOfoundassociatedwitha significantincreaseinheartdiseasedeathsand hospitaladmissionsforcongestiveheartfailure. (JAMA,Penny) lstambientleveloccupantsshouldbe notified-NCIProtocol

15-20ppmFirstlevelWorldHealthOrganizationlists ascausingimpairedperformance, decreaseinexercisetimeandvigilance 1stAlarmlevelforNSI3000LowLevel COMonitor-5minutes

25ppm MaximumallowableinaParkingGarage (InternationalMechanicalCode)

27ppm 21%increaseincardiorespiratorycomplaints (Kurt-1978)

30ppm Earliestonsetofexerciseinducedangina (WorldHealthOrganization) 1stvisualdisplayonUL2034approvedCO Alarm-Mustnotalarmbefore30days

35ppm USNIOSHrecommended8hourmaximum workplaceexposure EPAstandardforoutdoorsfor1hourand amaximumof1timeperyear

Levelmanyfiredepartmentswearbreathing apparatusbeforeentering

2ndambientleveloccupantsshouldbenotified andspaceventilated

2ndAlarmlevelforNSI3000LowLevel Monitor-5minutes

50ppm USOSHArecommended8hourmaximum workplaceexposure MaximumNCIlevelforUnventedappliances

70ppm 1stAlarmlevelofUL2034approvedCO Alarms-2-4hours 3rdAlarmlevelforNSI3000-30seconds NSI3000LowLevelMonitorcannotbesilenced byresetbutton

100ppm MaximumNCICOlevelduringruncycleinall ventedappliances(stable)

MaximumNCICOforalloilappliances

200ppm Firstlistedlevel(establishedin1930)healthy adultswillhavesymptoms-headaches,nausea NIOSH&OSHArecommendevacuationof workplace

MaximumAirFreeCOforventedwater heaterandunventedheaters(ANSIZ21)

ULapprovedalarmsmustsoundbetween 3060minutes(NSI300030seconds)

400ppm Healthyadultswillhaveheadacheswithin1-2 hours.Lifethreateningafter3hours MaximumAirFreeCOinallvented heatingappliances(ANSIZ21)

MaximumEPAlevelsforindustrialflueexhaust ULAlarmsmustalarmwithin15minutes (NSI300030seconds)

Maximumrecommendedlight-offCOforall appliancesNCI(exceptoil)

800ppm Healthyadultswillhavenausea,dizziness, convulsionswithin45minutes.Unconscious within2hoursthenDeath(establishedin1930) MaximumAirFreeCOforunventedgasovens (ANSIZ21)

800ppm+Deathinlessthanonehour

2000ppm EPAstandardfornewvehicleemissions

3000ppm+Typicalemissionsfrompropanelifttrucks, gasolinepoweredtoolsetc.

Deathinlessthan30minutes.

Carbon Monoxide Levels & RisksCO Level Action CO Level Action