The California Carbon Monoxide Poisoning Prevention Act of 2010 (California Health & Safety Code §13260 et seq.) is now law. It requires carbon monoxide detectors to be installed in every "dwelling unit intended for human occupancy" where the home has a fossil fuel burning heater or appliance (such as a gas stove or gas-powered water heater), fireplace, or attached garage.1 New homes with such features must be equipped with a carbon monoxide detector by January 1, 2011. Existing single-family homes must install carbon monoxide detectors by no later than July 1, 2011; and all other existing dwellings – including condominiums, townhomes, duplexes, and similar dwellings – must have such detectors installed by January 1, 2013. ...