What is the acceptable percentage of carbon monoxide in a sample of flue gas?

The acceptable percentage of carbon monoxide in a sample of flue gas is crucial for ensuring safe operation of gas appliances and protecting occupant safety. A flue gas sample that contains 0.04% carbon monoxide aligns with established safety standards which aim to minimize the risk of exposure to harmful gases.

Carbon monoxide (CO) is a colorless, odorless gas that can be hazardous even at low concentrations. The generally accepted threshold is typically set at this level to ensure that any exhaust emissions are within safe limits, safeguarding the health of individuals who may be exposed to the gases released by combustion processes.

Other percentages, such as 0.01%, 0.1%, and 0.5%, do not reflect the accepted limits as rigorously defined by safety guidelines. The 0.01% level is too low to be a realistic measure in practical situations, while 0.1% and 0.5% are above what is generally deemed acceptable for safe indoor air quality. By adhering to the 0.04% standard, one can ensure compliance with safety regulations and minimize health risks associated with carbon monoxide exposure.