Carbon Monoxide Investigation

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Carbon Monoxide Investigation
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Why It Matters.
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Preventing Tragedies
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Where Does CO Come From?
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What causes CO?
Heavy Traffic 50 ppm CO
7000 ppm CO (undiluted)
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What causes CO?
Smog
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What causes CO?
Warm Air Layer
Temperature Inversion (Mexico City) 100-200
ppm CO in the air
Trapped Emissions
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What Causes CO Inside?
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What Causes CO Inside?
5000 ppm CO
30,000 ppm CO (undiluted smoke)
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Complete Combustion
90 parts air
10 parts gas
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Incomplete Combustion
CO
70 parts air
10 parts gas
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Revise Snagit
Incomplete Combustion
Too much air
Not enough air
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Overgassing
Excess fuel
Too much fuel
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Quenching the Flame
Soot
CO
Incomplete Combustion
Proper temperature
Too cool
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CO Poisoning
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What is CO Poisoning?
Normal red blood cell
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Symptoms of CO Poisoning

• Mild Exposure
• Headache, nausea, vomiting, fatigue
• Medium Exposure
• Throbbing headache, drowsiness, confusion, fast
  heart rate
• Extreme Exposure
• Unconsciousness, convulsions, cardio-respiratory
  failure, death

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Effects of CO Exposure
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Pause for Discussion
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CO Detectors
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CO Detectors
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Detector Specifications
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Placement of Detectors
CO Detector
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MIS-placement of Detectors
CO Detector
Attic
Bathroom
Garage
Kitchen
CO Detector
Basement
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False Alarms
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False Alarms
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False Alarms
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False Alarms
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Understanding the CGI
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Sensit Gold CGI
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Ambient and Air-free CO
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Ambient vs. Air-free
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Pause for Discussion
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Doing a CO InvestigationStep-by-Step
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Step 1 Prepare your CGI.
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Zero the CGI.
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Test the sensor.
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Step 2 Survey the location.
Discolored
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Step 3 Take an ambient CO reading outside.
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Ambient Outside CO
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Step 4 Check around the door.
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Step 5 Interview the customer.
Still need better picture.
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Step 6 Enter the home.
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Do not make changes.
Still need picture of appliance with cover off.
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Compare inside outside CO readings.
Inside Ambient CO
Outside Ambient CO
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Compare inside outside CO readings.
Inside Ambient CO
Outside Ambient CO
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Look for evidence of incomplete combustion.
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Backdraft
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Step 7 Perform a CO test on all connected
appliances.
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Clock the appliance.
5-minute Appliance Warm-up
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Take an ambient reading in the flue.
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Service the appliance.
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Check for CO again.
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Step 8 Communicate with the customer.
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Pause for Discussion
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Checking Appliances
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Improper Venting
Heat
Cool Air Return
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Blocked Flues
02-02p2photo of blocked flue
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CO Thresholds
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CO Thresholds
Exceeds ambient threshold for burner. Take
action.
Exceeds air-free threshold for water heater.
Take action.
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Placing the Probe Correctly
Wall Heater (BIV)
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Placing the Probe Correctly
Condensing Furnace
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Placing the Probe Correctly
Condensing Furnace
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Placing the Probe Correctly
Induced Draft Appliance
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Direct Vent Wall Heater
Threshold 400 ppm
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Water Heater
Threshold 200 ppm air-free
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Forced Air Furnace
Threshold 400 ppm air-free
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Range Top
Threshold 25 ppm ambient
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Oven
Threshold 225 ppm ambient
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Threshold 25 ppm ambient
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Threshold 400 ppm air-free in the firebox
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Pause for Discussion
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Taking Action
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Acting on CO Calls
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Measured Level of Indoor Ambient CO
Responding to CO
Less than 35 ppm
Between 35 200 ppm
More than 200 ppm
Action
Advise evacuation
No
Yes
Yes
Require evacuation
No
No
Yes
Ventilate
No
Yes
Yes
Identify CO source
Yes
Yes
Yes
Repair appliance, if possible
Yes
Yes
Yes
Refer customer to indoor air specialist, if no
CO source is found.
Yes
No
No
Disconnect appliance, if you cant eliminate
hazard.
No
Yes
Yes
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If the reading is gt35 ppm CO, you must act.
Advise Evacuation
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If you cant fix the appliance
Capped Line
Hazard Notice
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gt 200 ppm CO
Require Evacuation
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gt 200 ppm CO
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Thank you
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Pause for Discussion