Keep your family safe from carbon monoxide poisoning. Carbon monoxide (CO) poisoning can happen at anytime during the year, but it is most prevalent during winter months when heating systems are turned on and not functioning as expected, or devices such as a generator or grills are used incorrectly inside the home, causing levels of carbon to increase and poison the individuals being exposed. Unless you have a carbon detector in your home, you or your family and friends are not safe from this danger.