The City of Reno is reminding the public about smoke alarm and carbon monoxide detector requirements, after hearing what happened to a local senior. A contractor apparently knocked on the door of a local senior, telling her that the building code has changed and that she needed to pay hundreds of dollars for a hardwired smoke alarm and carbon monoxide detector. In reality, building code only requires battery-operated detectors in existing homes, while there are higher requirements for new construction. Reno Vice Mayor Neoma Jardon says “The building code for existing homes hasn’t changed. Don’t fall for this scam.”