The best method of detection is to use a carbon monoxide detector in your home. A carbon monoxide detector is a device very similar to a smoke alarm. It monitors the air for carbon monoxide and sounds an alarm if a specific level is detected. Ideally, you should have one detector adjacent to every living area in your home.
Carbon monoxide detectors are most effective when used in combination with preventive maintenance. For more information on how to schedule regular maintenance for your furnace or about purchasing a carbon monoxide detector, contact your local Lennox Dealer.