Detector Placement for Maximum Effectiveness For carbon monoxide detectors: One CO detector is mandated on each level of the home. These detectors can be standalone CO detectors or combination smoke/CO detectors, typically positioned in hallways for optimal coverage. For smoke detectors: At least one smoke detector is required in each living area, bedroom, or the entrance to bedrooms. Hallways are also key locations for smoke detector placement, ensuring quick detection of smoke throughout the home. If they are up 10 ft tall then this must be noted so that team is aware to bring a ladder.  If wired keep them wired and if they are not in use then remove them.  Maintenance and Replacement Guidelines Age of Detectors: Detectors older than 7 years must be replaced. Aging detectors might not function as effectively due to wear and tear. Battery-Powered Detectors: If a functional battery-powered detector is less than 7 years old and does not have a tamper-resistant 10-year lithium battery, the batteries should be replaced regularly with fresh ones. Thorough Logging: It's imperative to keep a detailed log of each detector on the property. This log should include the detector type (smoke, CO, or combination), model, and specific location within the home. Testing: Each detector should undergo regular testing to ensure its functionality. During property inspections, every detector must pass a logged test and be documented accordingly.