1 mansel nelson, itep–eeop. 2 3 safety perform regular maintenance avoid installing unvented (or...
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Mansel Nelson,ITEP–EEOP
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SafetyPerform regular maintenanceAvoid installing unvented (or "vent-free”) heating
appliancesConsider using only sealed-combustion, induced draft, or
power-vented furnaces, boilers, and water heatersFor gas range, use properly sized range hood fanAfter installation of combustion and/or ventilation
equipment, test for proper functioningVent clothes dryers to outsideInstall a carbon monoxide alarm (state law)
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Silent Killer: Carbon Monoxide (CO)
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Combustion-Appliance Backdrafting
DepressurizationExhaust ventsWind
Pulls air back down chimney or flue
www.epa.gov/iaq/homes/hip-backdrafting.html
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CO Levels (General Guidelines)
0-9 ppm No significant health risk 35-50 ppm Exposure – chronic: headaches, nausea,
tired
Most Detectors Start Alarming 50-70 ppm Exposure - 2-3 hours: flu-like symptoms,
headache, nausea
70-200 ppm Exposure - 1 hour: dizziness, fatigue, vomiting
200-800 ppm Exposure – Minutes: unconsciousness, brain damage, DEATH
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How CO attacks… Red blood cells
prefer CO to oxygen If enough CO in air,
CO replaces oxygen in blood
Blocks oxygen from getting into body, damaging tissues and potentially causing death
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Common Sources of CO Blocked flue, chimney, vent pipes Rusted/cracked furnace heat exchanger Idling engine in attached garage Back-drafting, spillage Mal-adjusted fuel-fired space heater Unvented use of BBQ/charcoal indoors Gas stoves and ranges, water heaters Outdoor combustion exhaust near
door/vent/window
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Particulate Matter (PM)Eye, nose, throat, lung irritation
Bronchitis, allergies, asthma, respiratory and ear infections, cardiovascular conditions…
Sooting from appliancesGhosting on walls/ceilingWhat is adhered-to particle?
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Summary – Burning Practices
Best-burn practices are inexpensive and sustainable strategies
Education, outreach, and training are critical