IRC 2015 - Minnesota Amendments Section R315
R315.3 Where required in existing dwellings.
Where work requiring a permit occurs in existing dwellings that have attached garages or in existing dwellings within which fuel-fired appliances exist, carbon monoxide alarms shall be provided in accordance with Section R315.1.
Carbon monoxide alarms shall be installed outside and not more than 10 feet (3048 mm) from each separate sleeping area or bedroom. Alarms shall be installed on each level containing sleeping areas or bedrooms.
Remember, Carbon Monoxide Detectors are NOT Smoke Detectors.
For more information related to residential smoke alarm requirements, click on the link below.
For questions or concerns relating to smoke or CO detection, contact the Inspections Division by email or by calling (651) 714-3543.
The Minnesota State Fire Marshal recommends that smoke and CO detectors be replaced when they have been in use for more than 10 years or when the alarm fails to respond to testing. Other conditions also may cause an alarm to be less effective.