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NOTE: This unit contains no batteries and will not operate without power. 8.0 INSTALLING THE COSTAR® 12SIR FOR RESIDENTIAL USE 8.1 RECOMMENDATIONS One of the most important considerations in any CO alarm system is the location of the alarms. Statistics of the National Fire Protection Association (NFPA) show that most of the fatal CO occurrences happen at night while people are sleeping. Early warning of CO is best achieved by the correct installation of CO alarms. Placement of an alarm in a gara