In terms of efficiency, how much can a furnace lose with a 1% drop in CO2 levels?

The efficiency loss of a furnace related to CO2 levels is rooted in the combustion process and the relationship between oxygen and fuel. When CO2 levels drop by 1%, it indicates that there is an increase in the unburned fuel or a drop in the combustion efficiency. Specifically, a 1% drop in CO2 levels typically corresponds to a significant inefficiency in the combustion process, often quantified to be around a 5% decrease in efficiency for the furnace.

This relationship is important because an optimal combustion process results in higher CO2 production, indicating that the fuel is being burned effectively. Conversely, a drop suggests that fuel is being wasted, leading to lower efficiency and higher operational costs. The choice reflecting a 5% loss correlates appropriately with how combustion efficiency is assessed, offering a clear understanding of the implications of CO2 levels on furnace performance.