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Carboxyhaemoglobin % Symptom

10 None  


10-20 Tightness across forehead  

20-30 Headaches   

30-40 Severe headache, weakness, dizziness, nausea and vomiting  


40-50 Coma, intermittent convulsions   

60-70 Depressed heart action, death possible  


         70-80 Weak pulse, slowed respiration, death likely   

80 Death in minutes.   when is suffering from carbon monoxide poisoning get urgent medical advise             and do not use your appliance  until it has been checked by a competent person.   

Carbon Monoxide

The Silent Killer