ISO 16818:2008
(Main)Building environment design — Energy efficiency — Terminology
Building environment design — Energy efficiency — Terminology
ISO 16818:2008 gives terms and definitions for use in the design of energy efficient buildings. ISO 16818:2007 is applicable to new buildings and retrofitted existing buildings.
Conception de l'environnement des bâtiments — Rendement d'énergie — Terminologie
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 16818
First edition
2008-02-15
Building environment design — Energy
efficiency — Terminology
Conception de l'environnement des bâtiments — Rendement
d'énergie — Terminologie
Reference number
©
ISO 2008
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© ISO 2008
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ii © ISO 2008 – All rights reserved
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references. 1
3 Terms and definitions . 2
Bibliography . 32
Foreword
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(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
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ISO 16818 was prepared by Technical Committee ISO/TC 205, Building environment design.
iv © ISO 2008 – All rights reserved
Introduction
This International Standard is intended to provide general terms and definitions used in building environment
design. Other standards produced by ISO/TC 205 can contain additional definitions more specific to the needs
of the individual standard.
INTERNATIONAL STANDARD ISO 16818:2008(E)
Building environment design — Energy efficiency —
Terminology
1 Scope
This International Standard gives terms and definitions for use in the design of energy-efficient buildings. This
International Standard is applicable to new buildings and retrofitted existing buildings.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 6707-1, Building and civil engineering — Vocabulary — Part 1: General terms
ISO 7345, Thermal insulation — Physical quantities and definitions
ISO 7730, Ergonomics of the thermal environment — Analytical determination and interpretation of thermal
comfort using calculation of the PMV and PPD indices and local thermal comfort criteria
ISO 9229, Thermal insulation — Vocabulary
ISO 9251, Thermal insulation — Heat transfer conditions and properties of materials — Vocabulary
ISO 9288, Thermal insulation — Heat transfer by radiation — Physical quantities and definitions
ISO 9346, Hygrothermal performance of buildings and building materials — Physical quantities for mass
transfer — Vocabulary
ISO 13789, Thermal performance of buildings — Transmission and ventilation heat transfer coefficients —
Calculation method
1)
ISO 13790 , Energy performance of buildings — Calculation of energy use for space heating and cooling
ISO 15927-6, Hygrothermal performance of buildings — Calculation and presentation of climatic data —
Part 6: Accumulated temperature differences (degree-days)
ISO 16813, Building environment design — Indoor environment — General principles
1) To be published. (Revision of ISO 13790:2004.)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in the normative references and the
following apply.
3.1
access hatch
door
NOTE An access hatch is defined as a door, thereby allowing it to meet less stringent envelope requirements. If not
defined as a door, it is necessary that it be insulated as a roof or wall, depending on where it was located.
3.2
accessible
admitting close approach; not guarded by locked doors, elevations or other effective means
NOTE As applied to equipment; see also readily accessible (3.189).
3.3
adjusted lighting power
lighting power, ascribed to a luminaire(s) that has been reduced by deducting a lighting power control credit
based on use of an automatic control device(s)
3.4
adopting authority
agency or agent that adopts this International Standard
3.5
air-conditioned floor area
area equipped with air conditioning equipment measured at floor level from the interior surfaces of the walls
See gross conditioned floor area, (3.106).
3.6
air-conditioned space
space equipped with air conditioning equipment
See air-conditioned floor area (3.5).
3.7
air economizer
duct and damper arrangement and automatic control system that together allows a cooling system to supply
outside air to reduce or eliminate the need for mechanical cooling during mild or cold weather
3.8
air handling unit
encased assembly consisting of sections containing a fan or fans and other necessary equipment to perform
one or more of the following functions: circulating, filtration, heating, cooling, heat recovery, humidifying,
dehumidifying and mixing of air
3.9
alteration
rearrangement, replacement or addition to a building or its systems and equipment
NOTE Routine maintenance and service or a change in the building's category shall not constitute an alteration.
2 © ISO 2008 – All rights reserved
3.10
area factor
multiplying factor which adjusts the unit power density for spaces of various sizes to account for the impact of
room configuration on lighting power utilization
3.11
area of the space
A
horizontal lighted area of a given space measured from the inside of the perimeter walls or partitions, at the
height of the working surface
3.12
authority having jurisdiction
agency or agent responsible for enforcing this International Standard
3.13
automatic
self-acting, operating by its own mechanism when actuated by some impersonal intervention, such as a
change in current strength, pressure, temperature or mechanical configuration
3.14
automatic control devices
device capable of automatically turning loads off and on without manual intervention
3.15
average daily temperature
average of the temperatures readings over a 24 h period
3.16
ballast
device used in conjunction with an electric-discharge lamp to cause the lamp to start and operate under the
proper circuit conditions of voltage, current, wave form, electrode heat, etc.
3.16.1
ballast, electronic
ballast constructed using electronic circuitry
3.16.2
ballast, hybrid
ballast constructed using a combination of magnetic core, insulated wire winding and electronic circuitry
3.16.3
ballast, magnetic
ballast constructed with magnetic core and a winding of insulated wire
3.17
ballast efficacy factor
ratio of relative light output to the power input
3.18
ballast efficacy factor
〈fluorescent〉 ratio of the ballast factor expressed as a percent to the power input in watts, at specified test
conditions
3.19
ballast factor
BF
ratio of a commercial ballast lamp lumens to a reference ballast lamp lumens, used to correct the lamp lumen
output from rated to actual
3.19.1
ballast factor
ratio of the lumen output of a lamp/ballast combination to the lumen output of the same lamp in combination
with a piece of laboratory equipment called a reference reactor
NOTE Because a ballast may be designed to operate more than one lamp type, the same ballast model can have more
than one ballast factor value.
3.20
below-grade wall
see wall (3.244)
3.21
boiler
device to raise the temperature of a fluid or generate steam
3.22
boiler capacity
rated heat output of the boiler, at the design inlet and outlet conditions and rated fuel or energy input
3.23
budget building design
computer representation of a hypothetical design based on the actual proposed building design
NOTE This representation is used as the basis for calculating the energy cost budget.
3.24
building
construction as a whole, including its envelope and all technical building systems
3.25
building area
greatest horizontal area of a building above grade within the outside surface of exterior walls, or within the
outside surface of exterior wall and the centreline of fire walls
3.26
building entrance
any doorway set of doors, turnstiles or other form of portal that is ordinarily used to gain access to the building
by its users and occupants
3.27
building energy cost
computed annual energy cost of all purchased energy for the building
3.28
building envelope
elements of a building that enclose conditioned spaces through which thermal energy can be transferred to or
from the exterior, or to or from unconditioned spaces
3.28.1
building envelope, exterior sheltered
elements of a building that separate conditioned spaces from the exterior
3.28.2
building envelope, semi-exterior sheltered
elements of a building that separate conditioned space from unconditioned space (as far as it is not designed
for human occupancy) or that enclose semi-heated spaces through which thermal energy can be transferred
to or from the exterior, or to or from unconditioned spaces, or to or from conditioned spaces
4 © ISO 2008 – All rights reserved
NOTE 1 Building envelope defines the surfaces that require insulation or weather-stripping. The outer shell of the
building is not necessarily the same as the building envelope, particularly where the building contains semi-heated or
unconditioned spaces.
NOTE 2 In some cases, the designer can determine the location of the exterior building envelope by the location that
they place the insulation. For instance, it is not uncommon for a stairwell to be at the outside edge of the building. If that
stairwell does not have any heating or cooling supply, it can be insulated on the outside edge or the side adjacent to other
heated or cooled space. If insulated on the outside, the stairwell becomes indirectly conditioned and the outside wall is the
exterior building envelope. If insulated on the inside, the inside wall is likely to become the exterior building envelope
(unless the outside exposure is so small that it would still be indirectly conditioned space).
NOTE 3 Where a building with conditioned space also contains semi-heated spaces or unconditioned spaces, the
building envelope for the conditioned space is the roofs, walls, floors, doors, fenestration, etc. that separate the
conditioned space from the exterior. These elements shall comply with the residential or non-residential conditioned space
requirements.
NOTE 4 For semi-heated spaces, the building envelope includes any roofs, walls, floors, doors, fenestration, etc. that
separate the semi-heated space from conditioned or unconditioned spaces (as well as from the exterior). These elements
shall comply with the semi-heated space requirements, as shall elements separating conditioned spac
...
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