 The use of carbon monoxide detectors has been standardized in many areas . In the USA , NFPA 720 @-@ 2009 , the carbon monoxide detector guidelines published by the National Fire Protection Association , mandates the placement of carbon monoxide detectors / alarms on every level of the residence , including the basement , in addition to outside sleeping areas . In new homes , AC @-@ powered detectors must have battery backup and be interconnected to ensure early warning of occupants at all levels . NFPA 720 @-@ 2009 is the first national carbon monoxide standard to address devices in non @-@ residential buildings . These guidelines , which now pertain to schools , healthcare centers , nursing homes and other non @-@ residential buildings , include three main points : 
