Reply To: CO detectors req'd HOME › Forums › Reply To: CO detectors req'd May 14, 2015 at 4:10 pm #1519 Duncan RydallParticipant Greetings, DIV B 2.16.2.1. (2) (b) Will work if the sleeping areas in the residential have a common wall, floor or ceiling with the kitchen space below. Best Regards, Duncan Rydall