IEQ PreReq - Carbon monoxide monitoring

Dear Yun, You are right in saying that CO is produced by kitchen devices that burn fuels. Electrical kitchen appliances do not produce CO under normal circumstances however, in some circumstances such as when burning (browning or blackening) any food, like baking bread or pies in an electric oven or  during self clean cycle, CO is emitted. Hence, the requirement of CO monitors.

Is this an official USGBC position? Are CO monitors mandatory no matter what?

Carbon monoxide detectors are mandatory in many jurisdictions. It is a prerequisite in LEED, meaning it is mandatory no matter what.  CO can arise from many sources, including malfunctioning heating systems, vehicle exhaust being introduced, and improper use of portable heaters or charcoal.  

Response from GBCI ragarding CO sensors in Residential building: All projects are required to install carbon monoxide detectors in accordance with this prerequisite, even if no combustion appliances are installed. Occupants might bring in ventless fireplaces or nonelectric space heaters which can emit CO and monitors will help to keep the occupants safe from exposure.

There is a labor accomodation project with the no cooking facilities. Do we still need to have CO sensors one per unit? If I am correct, the requirement applies to dwelling units only and the current project's lodging facilities without cooking provision donot qualify as dwelling units? 

Hi Everyone,There is no explicit guidance in the reference guide as to the concentration of Carbon Monoxide at which the CO Sensors must activate an alarm in apartments. The only concentration I could find is the "9 ppm (or 2 ppm above outdoor levels)" which is in the IAQ Assessment requirements.I believe LEED must have referenced other indoor air quality standards for this. Anyone knows what CO concentration thresholds must be set for the alarms and can they be connecting with the BMS or have to sound an alarm for the apartment occupants?