Why is it important to check for carbon monoxide (CO) levels in combustion appliances?

Monitoring carbon monoxide (CO) levels in combustion appliances is critical because CO is a colorless, odorless gas that can pose serious health hazards. When combustion appliances operate improperly or are poorly ventilated, they can release CO into the living space, which can lead to carbon monoxide poisoning. This can result in symptoms such as headaches, dizziness, confusion, and in severe cases, can be fatal. Ensuring that CO levels are within safe limits helps protect occupants from these dangerous health risks.

The other aspects, while relevant to overall appliance performance and safety, do not capture the primary hazard associated with CO. Efficiency, combustion failure, and gas flow improvements are certainly important considerations in assessing appliance performance but are secondary to the immediate and life-threatening risks that elevated CO levels present. Therefore, prioritizing health and safety through CO level monitoring is essential.