Smoke and heat detectors as well as carbon monoxide alarms fall under the Building Code and Electrical Code. A hard wired 120V system is required in all jurisdictionsfor the purpose of protecting property and life. Many time the insurance companies require an upgrade to the house to include hard wired smoke / heat detectors and carbon monoxide.
Keep in mind that batteries need to be replaced every year and the smoke/ heat detectors also need to be replaced every 5 years.
We work closely with your insurer and we provide them with a letter of compliance at the end of the project.