Carbon Monoxide Detectors
Beginning July 1, 2011 California residents are required to have carbon monoxide detectors in their homes. This applies to single-family homes with appliances that burn fossil fuels, have attached garages, or fireplaces. Types of fossil fuels include wood, gas, and oil. For all other types of housing, such as apartments and hotels, detectors are required by January 1, 2013.
Carbon monoxide detectors must sound an audible warning when carbon monoxide is detected. It must be battery-powered, or have a battery backup if it is a plug-in type. National testing labs, such as the Underwriters Laboratories, must certify detectors. The packaging will state if it is a certified detector. If the carbon monoxide detector is also a smoke detector, it must meet the above standards and the two alarm sounds must be different. Carbon monoxide detectors typically cost $20 and up.

