Article: Reader disputes Wheeler's column on carbon monoxide.(Letters)(Letter to the Editor)

Having worked in the field with contractors for the past 27 years and having performed more than 50,000 combustion tests on equipment, especially carbon monoxide, I am disappointed to see such misinformation printed in a trade publication in the 21st century ("Do Gas Furnaces Create A Significant Carbon Monoxide Threat?" by Jim Wheeler, SUPPLY HOUSE TIMES, February 2005, page 77). The following are nine statements with which I disagree wholeheartedly, along with my explanation:

1 "80+ & 90+ efficient furnaces that are working correctly do not produce any carbon monoxide."

Wrong: Usually all combustion devices produce some levels of carbon monoxide, ...

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