What can high levels of carbon monoxide in a home indicate?

High levels of carbon monoxide in a home can indeed indicate that gas appliances are not functioning properly or that there is inadequate ventilation. Carbon monoxide (CO) is a colorless, odorless gas that is produced during the incomplete combustion of fuels such as natural gas, propane, gasoline, wood, and charcoal.

When gas appliances—such as furnaces, water heaters, or stoves—are malfunctioning, they may not burn fuel efficiently, resulting in the release of carbon monoxide into the home. Additionally, if the home is poorly ventilated, there may not be enough fresh air to dilute any CO produced, leading to dangerous concentrations. Proper ventilation is vital for ensuring that combustion gases are safely vented outside and do not accumulate indoors.

In contrast, conditions such as excessive air conditioning or high humidity do not directly correlate with carbon monoxide production. A well-ventilated space would actually help prevent the buildup of CO by allowing fresh air to circulate and diluting any harmful gases.