What is the ACTION required at CO levels between 100 ppm to 300 ppm?

At carbon monoxide (CO) levels between 100 ppm to 300 ppm, the appropriate action requires the installation of a CO detector and a recommendation for service to the consumer. This level of CO indicates a potentially hazardous situation where individuals could be at risk. A carbon monoxide detector serves as an essential safety device that alerts occupants to dangerous levels of CO, helping to prevent poisoning or other health risks. It's vital to notify the consumer of the need for service, as this level of CO often signals incomplete combustion or other issues with the appliance that warrant investigation and correction to ensure the safety of individuals in the vicinity.

This response emphasizes the importance of immediate awareness and action while also ensuring the consumer is educated about the potential dangers associated with carbon monoxide exposure.