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Welcome to NFPA®'s all-inclusive Carbon Monoxide Alarms site. Here you will find everything you need to teach people how carbon monoxide (CO) is produced in and around the home–and how to protect themselves from this invisible, odorless killer. Get the latest CO safety facts and tips, find out all about home heating safety, learn life-saving facts with Sparky®'s FAQs, sign up for a Safety Source e-newsletter, and more.