ANSI ASHRAE-15-2004 pdf download Safety Standard for Refrigeration Systems
4. OCCUPANCY CL ASSIFICATION
4.1 Locations of refrigerating systems are described by occupancy classifcations that consider the ability of pcople to respond to potential exposure to refrigerant as follows:
4.1.1 Institutional occupancy is a premise or that portion of a premise from which, because they are disabled, debili- tated, or confined, occupants cannot readily leave without the assistance of others. Institutional occupancies include, among others, bospitals, nursing homes, asylums, and spaces con- taining locked cells.
4.1.2 Public assembly occupancy is a premise or that por- tionofapremise where large numbers ofpeoplecongregate and from which occupants cannot quickly vacate the space. Public assembly occupancies include, among others, auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters.
4.13 Residential occupancy is a premise or that portion of a premise that provides the occupants with complete independent living facilities inchuding permancnt provisions for living, sleeping, eating, cooking, and sanitation. Residential occupancies include, among others, dormitories, hotels, multi-unit apartments, and private residences.
4.1.4 Commercial occupancy is a premise or that portion ,of a premise wbere people transact business, receive personal service, or purcbase food and other goods. Commercial occupancies include, among others, office and professional buildings, markets (but not large mercantile occupancies), and :work or storage areas that do not qualify as industrial oCcUpancies.
4.1.5 Large mercantile occupancy is a premise or that portion of a premise where more than 100 persons congregate on levels above or below street level to purchase personal merchandise.
4.1.6 Industrial occupancy is a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to maoufacture, process, or store goods such as chemicals, food, ice, meat, or petroleum,
4.1.7 Mixed occupancy occurs when two or more occu- pancies are located within the same building. When each occupancy is isolated fom the rest of the building by tight walls, floors, and ceilings and by self-closing doors, the requirements for each occupancy shall apply to its portion of the building. When the various occupancies are not so iso- lated, the occupancy having the most stringent requirements shall be the goveming occupancy.
4.2 Equipment, other than piping, located outside a building and within 20 ft (6.1 m) of any building opening shall be governed by the occupancy clasification of the building.