In this subchapter:
(1) "Bedroom" means a room designed with the intent that it be used for sleeping purposes.
(2) "Dwelling unit" means a home, mobile home, duplex unit, apartment unit, condominium unit, or any dwelling unit in a multiunit residential structure. It also means a "dwelling" as defined by Section 92.001.
(3) "Smoke alarm" means a device designed to detect and to alert occupants of a dwelling unit to the visible and invisible products of combustion by means of an audible alarm.