​The following code sections were approved by the North Carolina Building Code Council and became effective January 1, 2011. These concern the location for Carbon Monoxide Detectors in new and existing dwellings.

2009 NC Residential Code

R313 Carbon Monoxide Alarms. (090609 Item B-11)
R313.1.1 Carbon monoxide alarms. In new construction, dwelling units shall be provided with an approved carbon monoxide alarm installed outside of each separate sleeping area in the immediate vicinity of the bedroom(s) as directed by the alarm manufacturer.
R313.1.2 Where required – existing dwellings. In existing dwellings, where interior alterations, repairs, fuel-fired appliance replacements, or additions requiring a permit occurs, or where one or more sleeping rooms are added or created, carbon monoxide alarms shall be provided in accordance with Section 313.1.1.
R313.1.3 Alarm requirements. The required carbon monoxide alarms shall be audible in all bedrooms over background noise levels with all intervening doors closed. Single station carbon monoxide alarms shall be listed as complying with UL 2034 and shall be installed in accordance with this code and the manufacturer’s installation instructions.
(subsequent sections will be renumbered)
The delayed effective date of this Rule is January 1, 2011.
The Statutory authority for Rule-making is G.S. 143-136; 143-138.