Section 12-1104 - Installation of alarms(a) Except as provided in subsections (b) and (c) of this section, there must be a carbon monoxide alarm installed in a central location outside of each sleeping area within a dwelling subject to this subtitle.(b) For a hotel or a lodging or rooming house, on or after April 1, 2017, there must be a carbon monoxide alarm installed within the dwelling, as follows: (1) on the wall inside each guest room that: (i) contains a device that emits carbon monoxide;(ii) is adjacent to a room or area that contains a device that emits carbon monoxide;(iii) is adjacent to an enclosed unventilated attached garage; or(iv) is connected by ductwork to an enclosed unventilated attached garage or room or area that contains a device that emits carbon monoxide; and(2) on a wall in each room or area that:(i) contains a device that emits carbon monoxide;(ii) is adjacent to a room or area that contains a device that emits carbon monoxide; or(iii) is adjacent to an enclosed unventilated attached garage.(c) For a rental dwelling unit, on or after April 1, 2018, there must be a carbon monoxide alarm installed within the dwelling as follows:(1) outside and in the immediate vicinity of each separate sleeping area; and(2) on every level of the unit, including the basement.(d) Notwithstanding subsections (a), (b), and (c) of this section, if there is a centralized alarm system that is capable of emitting a distinct and audible sound to warn all occupants, the owner of a dwelling may install a carbon monoxide alarm within 25 feet of any carbon monoxide-producing fixture and equipment.Amended by 2016 Md. Laws, Ch. 175,Sec. 1, eff. 10/1/2016.Amended by 2016 Md. Laws, Ch. 174,Sec. 1, eff. 10/1/2016.Amended by 2015 Md. Laws, Ch. 151,Sec. 1, eff. 5/12/2015.