Carbon monoxide is the most common cause of death by poison in the United States, killing more than 500 people every year. Effective July 1, 2019, a new law in Montgomery County requires many existing single-unit, two-unit and townhouse dwellings to have Carbon Monoxide Alarms located outside sleeping areas and on every level of a home. Carbon Monoxide Alarms are designed to emit an alarm when high levels of CO are detected but before they reach life-threatening levels. The new law requires all single, two-unit and townhouse dwellings built before 2008 to have a fuel-burning appliance, fireplace or attached garage to install and maintain Carbon Monoxide Alarms as of July 1, 2019. It is also advised that a licensed professional inspect heating systems and other fuel-burning appliances annually.

Install fuel-burning appliances properly and operate according to the manufacturer's instructions. Keep chimneys clear of animal nests, leaves and residue to ensure proper venting. Have all fireplaces cleaned and inspected annually. Do not block or seal shut the exhaust flues or ducts used by water heaters, ranges and clothes dryers. Do not leave a car running in an attached garage or carport. Do not use ovens or stoves to heat a home. Do not use charcoal or gas grills inside or operate outdoors near a window where CO fumes could seep in through a window. Replace CO alarms as recommended by the manufacturer or sooner if the unit fails to operate.