(1) Smoke detection device. A self-contained alarm for detecting visible or invisible particles of combustion, which consists of an assembly of electrical components including a smoke chamber, alarm sounding appliance, and provision for connection to a power supply source, either by splice leads or a cord and plug arrangement or containing integral batteries. A supplemental heat detector may be included as part of the appliance. Terminals may be included for connection to a remote, audible signaling appliance or accessory. An integral transmitter may also be included to energize a remote audible signaling appliance. The smoke detection device may be of the photoelectric and/or ionization type.

(2) Photoelectric detector. A smoke detection device which activates when visible smoke from a fire enters the detector. Sensitive to smoldering fires as well as smoke generated by an open flame fire.

(3) Ionization detector. A smoke detection device which activates in response to invisible particles created by combustion. Sensitive to open flame fire.

(4) Combination photoelectric/ionization detector. A smoke detection device containing both an ionization and a photoelectric element.

(5) Dwelling unit. A single unit providing complete, independent living facilities for one or more persons including permanent provisions for living, sleeping, eating, cooking and sanitation.

(6) Sleeping room. A room or area of the dwelling unit which is ordinarily used for sleeping.

(7) Factory built housing. For the purpose of these rules, factory built housing is considered as any structure designed primarily for human occupancy other than a mobile home, the structure of any room of which is either entirely or substantially prefabricated or assembled at a place other than a building site, and which is subject to regulation by the Washington department of labor and industries pursuant to RCW 43.22.450 through 43.22.490.

(8) Mobile home. For the purpose of these rules, a mobile home is considered as a factory-assembled structure or structures assembled with the necessary service connections and made so as to be readily movable as a unit or units on its (their) own running gear and designed to be used as a dwelling unit without a permanent foundation, and which is subject to regulation by the Washington department of labor and industries pursuant to RCW 43.22.340 through 43.22.434.

(9) New building. For the purpose of these rules, a new building is considered as any structure constructed, erected or moved onto a permanent site on or after December 31, 1980, any portion of which is used or intended for use as a dwelling unit by any person or persons.

(10) Existing building. For the purpose of these rules an existing building is considered as any structure in existence prior to December 31, 1981, any portion of which is used, intended for use or thereafter converted for use as a dwelling unit by any person or persons other than the owner who do not otherwise qualify as a guest or member of the household of the owner.