A furnace or boiler operating with a CO2 level 1% lower than designed may lose as much as what percentage of its efficiency?

When a furnace or boiler operates with a CO2 level that is 1% lower than what is designed, it indicates that the combustion process is not optimized. This lower CO2 level typically means that there is a higher excess of air in the combustion process, which can lead to incomplete combustion. Incomplete combustion reduces the overall energy efficiency of the system because more fuel is needed to achieve the same output of heat.

The specific efficiency loss that occurs due to a 1% reduction in CO2 levels can vary based on the design and operating conditions of the furnace or boiler. However, research and practical industry knowledge suggest that such a reduction can lead to a notable decrease in efficiency, often recognized as around 5% efficiency loss.

Understanding this relationship between CO2 levels and combustion efficiency is crucial for professionals monitoring and optimizing heating systems. By maintaining CO2 levels at the designed specifications, they can ensure that the systems operate efficiently, maximizing energy use and reducing fuel costs.