Boiler Economizer: Boost Your Boiler's Performance I
2021-3-3 · Flue gas from a natural gas boiler running with 15% excess air (typical) will start to condense moisture below about 130-140 degrees Fahrenheit. So, just like a glass of iced tea on a summer day, the economizer will ‘sweat’. However, because that flue gas contains CO2, that sweat is ACID and will destroy carbon steel.
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