Here’s the abbreviated technical data, in FAQ format, courtesy of the California Association of Realtors:

What is carbon monoxide?
 
A  Carbon monoxide is a gas produced whenever any fuel, such as gas, oil, kerosene, wood, or charcoal, is burned.  A person cannot see or smell carbon monoxide.  However, at high levels carbon monoxide can kill a person in minutes.
In addition, there are well-documented chronic health effects of acute carbon monoxide poisoning from exposure to carbon monoxide, such as lethargy, headaches, concentration problems, amnesia, psychosis, Parkinson’s disease, memory impairment, and personality alterations. (Cal. Health & Safety Code 13261.)
 
Q 2.  Is there a new California law dealing with the issue of carbon monoxide poisoning?

A  Yes.  The Carbon Monoxide Poisoning Prevention Act of 2010 (Cal. Health & Safety Code §§ 13260 et seq.) was signed into law this year.  It requires carbon monoxide detectors to be installed in every “dwelling unit intended for human occupancy.”   
 
Q 3.  What is a carbon monoxide detector?

A  It is a relatively inexpensive device similar to a smoke detector that signals detection of carbon monoxide in the air.  Under the law, a carbon monoxide device is “designed to detect carbon monoxide and produce a distinct audible alarm.”  It can be 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.

If the carbon monoxide device is combined with a smoke detector, it must emit an alarm or voice warning in a manner that clearly differentiates between a carbon monoxide alarm warning and a smoke detector warning.


The carbon monoxide device must have 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.                                                             (Cal. Health & Safety Code § 13262.)
Q 5.  How many devices and where do I place them in the home?

A  This new law requires the owner “to install the devices in a manner consistent with building standards applicable to new construction for the relevant type of occupancy or with the manufacturer’s instructions, if it is technically feasible to do so” (Cal. Health & Safety Code 17926(b)).

The following language comes packaged with carbon monoxide (CO) detectors:
For minimum security, a CO Alarm should be centrally located outside of each separate sleeping area in the immediate vicinity of the bedrooms.  The Alarm should be located at least 6 inches (152mm) from all exterior walls and at least 3 feet (0.9 meters) from supply or return vents.
Building standards applicable to new construction are as follows (overview summary only):
 
• Section R315 et seq. of the 2010 edition California Residential Code (CRC) [effective Jan. 1, 2011] (applicable to new one-to-two family dwellings and townhouses not more than 3 stories and also where work requiring a permit for alterations, repairs or additions exceeding one thousand dollars in existing dwellings units):
Installed outside of each separate sleeping area in the immediate vicinity of the bedroom(s) in dwelling units and on every level including basements within which fuel-fired appliances are installed and in dwelling units that have attached garages.
 
• Section 420 et seq of the 2010 edition California Building Code (CBC) [effective Jan. 1, 2011] (applicable to other new dwelling units and also where a permit is required for alterations, repairs or additions exceeding $1,000 in existing dwelling units):
Installed outside of each separate sleeping area in the immediate vicinity of the bedroom(s) in dwelling units and on every level including basements within which fuel-fired appliances are installed and in dwelling units that have attached garages.
 
Q 10.  Do landlords have any special obligations regarding carbon monoxide detectors?

A  Yes.  All landlords of dwelling units must install carbon monoxide detectors as indicated in Question 4.  The law gives a landlord authority to enter the dwelling unit for the purpose of installing, repairing, testing, and maintaining carbon monoxide devices “pursuant to the authority and requirements of Section 1954 of the Civil Code [entry by landlord].”

The carbon monoxide device must be operable at the time that a tenant takes possession.  However, the tenant has the responsibility of notifying the owner or owner’s agent if the tenant becomes aware of an inoperable or deficient carbon monoxide device.  The landlord is not in violation of the law for a deficient or inoperable carbon monoxide device if he or she has not received notice of the problem from the tenant.