Product: Certain Lochinvar Condensing Gas Boilers and Condensing Gas Combi Boilers. Issue: The boiler's flue grommet can deteriorate and dislodge during use, and allow the boiler to emit carbon monoxide, posing a risk of carbon monoxide poisoning. What to do: Consumers should immediately contact the installer or a qualified technician to schedule a free repair. Affected products What you should do Joint recall with Health Canada, the United States Consumer Product Safety Commission (US CPSC) and Lochinvar, LLC.