Naperville, IL Building Safety: Carbon Monoxide Detectors (2026)

R311.1 Carbon monoxide alarms: Change to read as follows:

For new construction, an approved carbon monoxide alarm shall be installed outside and within 15 feet of each separate sleeping area in the immediate vicinity of the bedrooms in dwelling units within which fuel-fired appliances are installed and in dwelling units that have attached garages.

R311.4 Single And Multiple Station Carbon Monoxide Detectors: All carbon monoxide detectors shall be installed in accordance with the provisions of manufacturer's installation instructions.

R311.6 Exception 2 Carbon Monoxide Alarms, Power Source: Modify section to read as follows:

Carbon monoxide alarms installed in the portion of the residence that is not impacted by the renovation or addition installed in accordance with Section R311.2.2 shall be permitted to be battery powered. Carbon monoxide alarms within the area of renovation or addition shall follow power source requirements as identified in R311.6.

R313.1 Minimum Height: Add Exception 5.

Exception 5. Habitable spaces created in existing basements shall have ceiling heights of not less than 6 feet 8 inches, except that the ceiling height at obstructions shall be not less than 6 feet 4 inches from the basement floor.

Existing finished ceiling heights in non-habitable spaces in basement shall not be reduced.

Add new subsections to read as follows:

R314.8.1 Non-Monitored Fire Alarm Systems: