Security dealers that install smoke and carbon monoxide (CO) detectors for the residential market soon will have to meet some new requirements as a result of changes made to the latest National Fire Protection Association (NFPA) standards. The standards involved are the 2010 version of NFPA 72, the National Fire Alarm & Signaling Code, and the 2012 version of NFPA 720, the Standard for the Installation of Carbon Monoxide Detection & Warning Equipment.