Mount Prospect, IL Building Safety: Carbon Monoxide Detectors (2026)

Section 24.207 applies to every dwelling unit in the Village of Mount Prospect. Subsection B.1 requires at least one (1) carbon monoxide alarm in an operating condition within fifteen feet (15') of every room used for sleeping purposes. Subsection B.2 applies the same 15 foot standard to every building that contains more than one dwelling unit, using the words approved alarm in operating condition. A combined smoke and carbon monoxide unit is allowed under B.3 only if it complies with the Illinois Administrative Code, reference standards and Illinois State Fire Marshal rules for both devices and emits an alarm that clearly differentiates the hazard. Section 24.207 also deletes section 908.7, Carbon Monoxide Alarms, Exceptions Only, of the International Fire Code in its entirety.

Power rules are in B.4: battery powered, plug in with battery backup, or wired into the building's AC power line with a secondary battery backup. New construction, as defined in section 21.501, must be wired into the AC power line with a secondary battery backup. Alarms must be installed in accordance with manufacturers' requirements. The definition of an alarm requires compliance with Illinois State Fire Marshal rules, the label of a nationally recognized testing laboratory, and the most recent standards of the Underwriters Laboratories or the Canadian Standard Association.

The owner supplies and installs all required alarms, gives one tenant per dwelling unit written information on alarm testing and maintenance, ensures the batteries work when the tenant takes possession, and corrects deficiencies the tenant reports in writing. The tenant replaces batteries except on taking possession, tests and maintains the alarms, notifies the owner in writing of deficiencies, and provides access for repairs.

Subsection F exempts a dwelling unit in a building that does not rely on the combustion of fossil fuel for heat, ventilation, or hot water and is not connected in any way to a garage. A unit connected to a parking structure protected by an operating carbon monoxide detection system is also exempt if that structure is the only source of carbon monoxide. The Building Commissioner, on written request, can approve an exemption for buildings four (4) stories or greater.