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An assembly of components that performs a specific function in a building; for example, an air-conditioning system consisting of its components, such as ductwork, a fan, air diffusers, and controls.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
1. A complete group of elements or set of parts that form and function as a unit within a finished building.
2. An assemblage of components that perform a specific function in a building, e.g., an air-conditioning system consisting of its components such as a fan, ductwork, air diffusers, and controls.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.