ISO/TR 5863:2025 建物外壁の統合設計 — 一般原則 | ページ 6

3.1

building envelope

elements of a building as a boundary or barrier separating the interior volume of a building from the outside environment

[SOURCE:ISO 12569:2017, 3.5, modified — The words “elements of a building as a” have been added to the beginning of the definition.]

3.2

building envelope commissioning

BECx

process of enhancing the delivery of the design and construction of a building envelope by verifying and documenting the building envelope concepts, designs, materials, components, assemblies and systems that have been designed, installed and performance tested, and are maintainable, in accordance with the owner’s project requirements

[SOURCE:ISO 21105-1:2019, 3.5, modified — The words “enclosure” and “OPR” have been replaced by “envelope” and “owner’s project requirements” respectively.]

3.3

daylight sensing control

device that automatically regulates the power input to electric lighting near the fenestration to maintain the desired workplace illumination, thus taking advantage of direct or indirect sunlight

[SOURCE:ISO 16818:2008, 3.54]

3.4

design team

group of people who are responsible for building design

Note 1 to entry: The design team can consist of an architect, an interior designer, a lighting designer, a landscape designer, engineers in electrical engineering, illuminating engineering, HVAC systems, structural engineering and construction management and other specialists.

[SOURCE:ISO 19454:2019, 3.5]

3.5

heat island effect

phenomenon of elevated temperatures in urban and suburban areas compared to their outlying rural surroundings

Note 1 to entry: The temperatures can be influenced by various aspects, including the presence of denuded landscaping, impermeable surfaces, massive buildings, heat-generating vehicles and machines and pollutants.

[SOURCE:ISO 21929-1:2011, 3.14]

3.6

heat transfer coefficient

U-value

heat flow rate divided by the temperature difference between two environments

Note 1 to entry: Expressed in W·m^–2·K^–1_.

3.7

HVAC system

system that provides heating, ventilation or air conditioning for buildings

[SOURCE:ISO 16814:2008, 3.18]

3.8

rooflight

daylight opening on the roof or on a horizontal or near horizontal area of a building

[SOURCE:ISO 16817:2017, 3.19, modified — The words “or near horizontal” have been added.]

3.9

solar heat gain coefficient

SHGC

ratio of the solar heat gain entering the space through the fenestration area to the incident solar radiation

Note 1 to entry: Solar heat gain includes directly transmitted solar heat and absorbed solar radiation, which is then reradiated, conducted or convected into the space.

[SOURCE:ISO 16818:2008, 3.216]

3.10

technical building system

technical component for heating, cooling, mechanical ventilation (filtration and exhaust), humidification, dehumidification, domestic hot water, water supply, drainage and sanitary equipment, lighting, building automation and control, and electricity production on site

Note 1 to entry: A technical building system can refer to one or to several building services (e.g., heating, cooling, lighting and domestic hot water).

Note 2 to entry: Lifts and fire extinguishing systems can be included in technical building systems.

Note 3 to entry: A technical building system is composed of different sub-systems.

Note 4 to entry: Electricity production can include cogeneration, wind power and photovoltaic systems.

[SOURCE:ISO 16813:2024, modified — The words “on site” have been added.]

3.11

thermal mass

materials with mass heat capacity storing or releasing heat as the interior or exterior temperature, or both, convective and radiant conditions fluctuate, and affecting building thermal load

Note 1 to entry: Expressed in J·K^–1.

3.12

thermal resistance

R-value

ratio of the temperature difference between the two faces of a material to the rate of flow of heat unit area normal to the faces

Note 1 to entry: Expressed in m²·K·W^–1.

3.13

ventilation rate

magnitude of air flow to a room or building through the ventilation system, device or building elements

Note 1 to entry: Expressed in h^–1.

3.14

window-to-wall ratio

WWR

ratio of the net glazing area to the gross exterior wall area above the ground

[SOURCE:ISO 16818:2008, 3.249, modified — The word “fenestration” has been replaced with “net glazing” and the words “above the ground” have been added.]