The 2024 IBC and IFC now require CO alarms or detection systems for all types of occupancies. Previously, the focus was only on residential and schools.
915.1 General.
Carbon monoxide (CO) detection shall be installed in new buildings in accordance with Section 915.1.1. Carbon monoxide detection shall be installed in existing buildings in accordance with Section 1103.9.
Exception: Carbon monoxide detection is not required in Group S, Group F and Group U occupancies that are not normally occupied.
915.1.1 Where required.
Carbon monoxide detection shall be installed in the locations specified in Section
915.2 where any of the following conditions exist.
- In buildings that contain a CO source.
- In buildings that contain or are supplied by a CO-producing forced-air furnace.
- In buildings with attached private garages.
- In buildings that have a CO-producing vehicle that is used within the building.
915.2 Locations.
Carbon monoxide detection shall be installed in the locations specified in Sections 915.2.1 through 915.2.3.
915.2.6 All other occupancies.
For locations other than those specified in Sections 915.2.1 through 915.2.5, carbon monoxide detectors shall be installed on the ceiling of enclosed rooms or spaces containing CO-producing devices or served by a CO source forced-air furnace.
Exception: Where environmental conditions prohibit the installation of carbon monoxide detector in an enclosed room or space, carbon monoxide detectors shall be installed in an approved enclosed location contiguous with the room or space that contains a CO source.
915.3 Carbon monoxide detection.
Carbon monoxide detection required by Sections 915.1 through 915.2.3 shall be provided by carbon monoxide alarms complying with Section 915.4 or carbon monoxide detection systems complying with Section 915.5.
915.3.1 Alarm limitations.
Carbon monoxide alarms shall only be installed in dwelling units and in sleeping units. They shall not be installed in locations where the code requires carbon monoxide detectors to be used.
915.3.2 Fire alarm system required.
New buildings that are required by Section 907.2 to have a fire alarm system and by Section 915.2 to have carbon monoxide detectors shall be connected to the fire alarm system in accordance with NFPA 72.