HSC §13262: For purposes of this chapter, the following definitions shall apply: (a) “Carbon monoxide device” means a device that meets all of the following requirements: (1) A device designed to detect carbon mo

For purposes of this chapter, the following definitions shall apply: (a) “Carbon monoxide device” means a device that meets all of the following requirements: (1) A device designed to detect carbon monoxide and produce a distinct, audible alarm. (2) A device that is battery powered, a plug-in device with battery backup, or a device installed as recommended by Standard 720 of the National Fire Protection Association that is either wired into the alternating current power line of the dwelling unit with a secondary battery backup or connected to a system via a panel. (3) If the device is combined with a smoke detector, the combined device shall comply with all of the following: (A) The standards that apply to carbon monoxide alarms as described in this chapter. (B) The standards that apply to smoke detectors, as described in Section 13113.7. (C) The combined device emits an alarm or voice warning in a manner that clearly differentiates between a carbon monoxide alarm warning and a smoke detector warning. (4) The device has been tested and certified, pursuant to the requirements of the American National Standards Institute (ANSI) and Underwriters Laboratories Inc. (UL) as set forth in either ANSI/UL 2034 or ANSI/UL 2075, or successor standards, by a nationally recognized testing laboratory listed in the directory of approved testing laboratories established by the Building Materials Listing Program of the Fire Engineering Division of the Office of the State Fire Marshal of the Department of Forestry and Fire Protection. (b) “Dwelling unit intended for human occupancy” means a single-family dwelling, factory-built home as defined in Section 19971, duplex, lodging house, dormitory, hotel, motel, condominium, stock cooperative, time-share project, or dwelling unit in a multiple-unit dwelling unit building or buildings. “Dwelling unit intended for human occupancy” does not mean a property owned or leased by the state, the Regents of the University of California, or a local governmental agency. (c) “Fossil fuel” means coal, kerosene, oil, wood, fuel gases, and other petroleum or hydrocarbon products, which emit carbon monoxide as a byproduct of combustion.