What safety measure is associated with properly maintaining an oil-fired furnace?

Proper maintenance of an oil-fired furnace is crucial in preventing carbon monoxide buildup, which is a significant safety concern. When an oil burner is functioning correctly, it should burn fuel efficiently, producing ideally only carbon dioxide and water as byproducts. However, if there are issues such as incomplete combustion or blockages in the venting system, carbon monoxide can accumulate. This colorless and odorless gas can be extremely dangerous, leading to serious health risks or even fatalities. Regular maintenance, including checking the combustion process and ensuring the exhaust system is clean and unobstructed, helps to mitigate this risk and ensures that harmful gases are vented safely outside the living space.