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Chapter 70 <br /> detector installed on the upper level shall suffice for the adjacent lower level if the <br /> lower level is less than one full story below the upper level; however, if there is an <br /> intervening door between the adjacent levels, a smoke detector shall be installed on <br /> each level. (3) Every structure which (i) contains more than one dwelling unit, or <br /> (ii) contains at least one dwelling unit and is a mixed-use structure, shall contain at <br /> least one approved smoke detector at the uppermost ceiling of each interior <br /> stairwell. The detector shall be installed on the ceiling, at least 6 inches from the <br /> wall, or on a wall located 6 to 12 inches from the ceiling, measure to the top of the <br /> detector. <br /> mm 7(�-�_?_2_1��te;rcc�n�Yc;ciicm is...n�>e�--7,(}.�4.> <br /> nn 7()�.?.; f'or�-e;r 5��u�°c� is rz��ti�,� 7()4.-� <br /> f�} �_....._.___._....._._._.._.____._ ..__..._.._....___...�_..___. <br /> (-�=}-- oa 704.5 Carbon Monoxide Alarm Detectors. Definitions: (i) "Approved carbon <br /> monoxide alarm" or "alarm" means a carbon monoxide alarm that complies with all the <br /> requirements of the rules and regulations of the Illinois State Fire Marshal, bears the label <br /> of a nationally recognized testing laboratory, and complies with the most recent standards <br /> of the Underwriters Laboratories or the Canadian Standard Association. (ii) Dwelling <br /> Unit. A room or suite of rooms used for human habitation, and includes a single family <br /> residence as well as each living unit of a multiple family residence and each living unit in a <br /> mixed use building. (iii) Section l. Carbon Monoxide Detector. (a) Every dwelling unit <br /> shall be equipped with at least one approved carbon monoxide alarm in an operating <br /> condition within 15 feet of every room used for sleeping purposes. The carbon monoxide <br /> alarm may be combined with smoke detecting devices provided that the combined unit <br /> complies with the respective provisions of the administrative code, reference standards, <br /> and departmental rules relating to both smoke detecting devices and carbon monoxide <br /> alarms and provided that the combined unit emits an alarm in a manner that clearly <br /> differentiates the hazard. (b) Every structure that contains more than one dwelling unit <br /> shall contain at lease one approved carbon monoxide alarm in operating condition within <br /> 15 feet of every room used for sleeping purposes. (c) It is the responsibility of the owner <br /> of a structure to supply and install all required alarms. It is the responsibility of a tenant to <br /> test and to provide general maintenance for the alarms within the tenant's dwelling unit or <br /> rooming unit, and to notify the owner or the authorized agent of the owner in writing of <br /> any deficiencies that the tenant cannot correct. The owner is responsible for providing one <br /> tenant per dwelling unit the written information regarding alarm testing and maintenance. <br /> The tenant is responsible for replacement of any required batteries in the carbon monoxide <br /> alarms in the tenant's dwelling unit, except that the owner shall ensure that the batteries are <br /> in operating condition at the time the tenant takes possession of the dwelling unit. The <br /> tenant shall provide the owner or the authorized agent of the owner with access to the <br /> dwelling unit to correct any deficiencies in the carbon monoxide alarm that have been <br /> reported in writing to the owner or the authorized agent of the owner. (d) The carbon <br /> monoxide alarms required may be either battery powered, plug-in with battery back-up, or <br /> wired into the structure's AC power line with secondary battery back-up. Exemptions: <br /> The following residential units shall not require carbon monoxide detectors: (1) a <br /> residential unit in a building that: (i) does not rely on combustion of fossil fuel for heat, <br /> ventilation, or hot water; (ii) is not connected in any way to a garage; and (iii) is not <br /> sufficiently close to any ventilated source of carbon monoxide, as determined by the local <br /> building official, to receive carbon monoxide from that source. (2) a residential unit that is <br />