Appendix F
Glossary
Item Term
Definition
1 Acoustic linings
Insulating materials secured to the inside of ducts to attenuate sound which is
transmitted along the ducts and provides thermal insulation.
2 Acoustic louvers
A series of streamlined, perforated metal baffles having an air foil shape, which are
filled with a sound-absorptive material such as fiberglass.
3 Air handling units
An air handling unit consists of a fan or fans and coils for cooling, dehumidification,
heating and filtration used for space air conditioning.
4 BEAM Professional
(BEAM Pro)
Also known as “BEAM Pro”, a green building professional accredited by the Hong
Kong Green Building Council in the various aspects of the green building life cycle.
One key role of a BEAM Pro is to integrate the latest green building standards and
practices into everyday building planning, design, construction and operation.
5 Building integrated
photovoltaic (BIPV) panels
A building Integrated photovoltaic panel is a photovoltaic panel that has been
integrated into the design of the building or structure.
6 Carbon footprint
A form of carbon calculation that measures the amount of carbon dioxide equivalent
that a country, a business, industry or an individual is responsible for.
7 Carbon neutral
The maintenance of a balance between carbon emissions and a reduction in
carbon dioxide.
8 CFL
A compact fluorescent lamp (CFL) is an energy efficient lamp that can be used
instead of a incandescent lamp and uses less energy with a longer life.
9 Charge controllers
A charge controller is a voltage and/or current regulator to keep batteries from
overcharging.
10 Daylight factor (DF)
The percentage ratio of the instantaneous illumination level at a reference point
in the interior space to that occurring simultaneously outside in an unobstructed
position, in a unit of %.
11 Daylight colour rendition Daylight colour rendition is a quantitative measure of the ability of a light source
to reproduce the colors of various objects faithfully in comparison with an ideal or
natural light source. Light sources with a high CRI are desirable in colour-critical
applications such as photography and cinematography.
12 Desiccant dehumidifiers A desiccant dehumidifier is a device that employs a desiccant material to produce
a dehumidification effect. It consists of a fan to move the air to be dehumidified
(process air) through the desiccant holder, a fan to move the low humidity air for
drying the desiccant through the desiccant holder and a heater to heat the air that
will be used to dry the desiccant (regeneration air).
13 Direct digital control
Direct digital control (DDC) is the automated control of a condition or process by a
digital device.
14 Double glazing
Insulated glazing (IG), more commonly known as double glazing (or double-pane,
and increasingly triple glazing/pane) are double or triple glass window panes
separated by an air or other gas filled space to reduce heat transfer across a part of
the building envelope.
15 Energy audit
Energy audit is a regular review of the usage of energy in a building to increase
effectiveness of energy. The auditors examines the energy account of energy
consuming equipment, checks the way energy is used in its various components
and identifies savings opportunities.
16 Fan coil unit (FCU)
Fan coil unit consists of a small fan or fans and a coil for cooling, dehumidification,
heating and filtration used for space air conditioning.
Appendix F
Hong Kong Green Building Council 213
