boiler flue gas oxygen is too harmful

Flue gas carbon dioxide and oxygen - Ian Braithwaite, BSc

If your boiler's flue becomes blocked, these gases have nowhere to go other than back inside your home. In some cases, this can be fatal, with the NHS stating that around 60 deaths a year are caused by carbon monoxide poisoning. The two main gases your gas condensing boiler produces are water vapour and carbon dioxide. Nitrogen oxide can also be created when the oxygen and nitrogen in the air are burned …

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What happens if a boiler flue is blocked? | Viessmann

Boiler Flue Regulations 2020: A Simple Guide | Skills

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Why Oxygen Levels Matter in High Efficiency Boilers

Oct 10, 2017 · There is a diminishing returns effect in oxygen content and performance for the unit. Too much available oxygen will lead to inefficient combustion. Over time, the unit will require unscheduled maintenance. Too little available oxygen causes unstable combustion …

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Understanding the Impact of Excess Air

Mar 15, 2019 · Many operators of industrial furnaces are losing significant amounts of energy because of too much air entering the furnace, resulting in heat loss through flue gases. The excess air results in oxygen that isn't consumed during combustion, and this oxygen …

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Flue gases and combustion product hazards from heating

Oxygen measurement is critical when testing exhaust flue gases in furnaces or boilers. A flue, also known as a smokestack or a chimney, is the vertical pipe which allows exhaust gases from combustion to be vented into the atmosphere. The exhaust gases are the result of burning fuel inside a furnace, oven, boiler or steam generator.

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Boiler Flue Regulations 2021: A Simple Guide | Skills

A boiler's excess air supply provides for safe operation above stoichiometric conditions. A typical burner is usually set up with 10-20% excess air (2-4% O2). NOx controls that require higher excess air levels can result in fuel being used to heat the air rather than transferring it to usable energy.

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Combustion Efficiency and Excess Air

The correct amount of excess air is determined from analyzing flue gas oxygen or carbon dioxide concentrations. Inadequate excess air results in unburned combustibles (fuel, soot, smoke, and carbon monoxide), while too much results in heat lost due to the increased flue gas flow—thus lowering the overall boiler fuel-to-steam efficiency.

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