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natural gas combustion , how much C O ppm cast iron boiler

Jim Davis
Jim Davis Member Posts: 305
The ANSI Z21 approved ppm is 400ppm "Air Free". But for safety it is better to keep in under 100ppm.


  • mike t_3
    mike t_3 Member Posts: 6

    How much C O in ppm is acceptable up the chimney from a Hydrotherm cast iron boiler with stainless burners,
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