1)
The words and terms in italics in this Code shall have the following
meanings:
Addition
means any conditioned space that is added to an existing building and that increases the building’s floor surface area by more than 10 m
2 .
Air barrier assembly
means the combination
of air barrier materials and air barrier accessories within the environmental
separator that are designed to act as a continuous barrier to the
movement of air through the environmental separator.
Airflow control area
means a portion
of a building to which the flow of air
from the heating, ventilating or air-conditioning air distribution
system can be reduced or stopped without reducing or stopping the
flow of air to other portions of the building.
Annual energy consumption
means the
annual sum of the lighting, service water heating and space-conditioning energy consumption of the proposed building design, as calculated in accordance
with the requirements of Part 8 of Division B.
Authority having jurisdiction
means the governmental body responsible for
the enforcement of any part of this Code or the official or agency
designated by that body to exercise such a function.
Boiler
means an
applianceThe definition of this term can be found in
the National Building Code of Canada 2015. intended to supply hot water or steam for space
or service water heating purposes, except storage-type service water heaters.
Building
means any structure used or intended for supporting or sheltering
any use or occupancy.
Building energy target
means the annual energy consumption of a hypothetical
replica of the proposed building, using
the same energy sources for the same functions and having the same
environmental requirements, occupancy,
climatic data and operation schedules as the proposed building, but made to comply with all applicable prescriptive
requirements of this Code.
Building envelope
means the collection
of components that separate conditioned space from unconditioned space, the exterior air or the ground, or that
separate conditioned spaces intended to
be conditioned to temperatures differing by more than 10°C at design conditions. (See Appendix A.)
Building height
(in storeys) means the number
of storeys contained between the roof and
the floor of the
first storey.
Ceiling height
(CH) means the average
height of the ceiling where there is a ceiling and the average height
of the base of the installed luminaires where there is no ceiling.
Coefficient of performance
(COP) means,
for a heat pump in the heating mode, the ratio of the rate of net
heat output to the total energy input expressed in consistent units
and under designated rating conditions, as described in the standards
referenced in this Code; for refrigerating equipment or a heat pump
in the cooling mode, COP means the ratio of the rate of heat removal
to the rate of energy input in consistent units and under designated
rating conditions, as described in the standards referenced in this
Code.
Combustion efficiency
(E
c) means a measure of the efficiency of fuel-burning equipment in
converting fuel to heat, as obtained through the procedures described
in the standards referenced in this Code.
Conditioned space
means any space within a building, the temperature of which is controlled to limit variation in response
to the exterior ambient temperature by the provision, either directly
or indirectly, of heating or cooling over substantial portions of
the year.
Dwelling unit
means a suite operated as a housekeeping
unit, used or intended to be used by one or more persons and usually
containing cooking, eating, living, sleeping and sanitary facilities.
Enclosed space
means a volume substantially
surrounded by solid surfaces such as full-height walls or partitions, floors, ceilings, and openable devices
such as doors and operable windows.
Energy-efficiency ratio
(EER) means,
for refrigerating equipment or a heat pump in the cooling mode, the
ratio of net cooling capacity in Btu/h to the total rate of electric
input in watts, under designated operating conditions, as described
in the standards referenced in this Code.
Energy factor
(EF) means a measure of
overall energy efficiency in terms of energy output compared to energy
consumption over a 24-h usage cycle and is obtained as described in
the standards referenced in this Code.
Exhaust duct
means a duct through which
air is conveyed from an interior space to the outdoors or to unconditioned
space.
Exit
means
that part of a
means of egress, including doorways, that leads from
the
floor area it serves, to a separate building, an open public thoroughfare, or an exterior open
space protected from fire exposure from the building and having access to an open public thoroughfare.
Exterior entrance
means a doorway used
for entering, or for entering and exiting, a building, that leads from an exterior space to a space provided with interior lighting.
Exterior exit
means a doorway used only
for exiting from an area provided with interior
lighting to an exterior space.
Facade lighting
means lighting installed
to highlight features of the principal front of a building or a face of a building that overlooks a street or open space and includes lighting installed
on the facade and on constructed or natural surfaces in close proximity
to the facade. Facade lighting does not
include signage or other lighting installed on the facade that is
intended to light exterior spaces or surfaces other than the facade.
Farm building
means a building or part thereof
that does not contain a
residential occupancy and that is associated with and located
on land devoted to the practice of farming, and used essentially for
the housing of equipment or livestock, or the production, storage
or processing of agricultural and horticultural produce or feeds.
Fenestration
means all building envelope assemblies, including their frames, that transfer visible light, such as windows,
clerestories, skylights, translucent wall
panels, glass
block assemblies, transoms,
sidelights, sliding, overhead or swinging glass doors, and glazed
inserts in doors, etc.
Firewall
means a type of
fire separation of
noncombustible
construction
that subdivides
a building or separates adjoining buildings to resist the spread of fire, has a
fire-resistance rating as prescribed in the NBC or NFC, and has structural
stability to remain intact under fire conditions for the required
fire-rated time.
Floor surface area
means the area of
a floor surface, including heated garages, measured from the interior
surface of the perimeter walls at or near floor level, including the
area occupied by columns, interior walls and openings in the floor.
Foundation
means a system or arrangement of
foundation
units
through which the loads
from a building are transferred to the
supporting
soil or
rock.
Frame
in a door, window or other glazed
area means the associated head, jambs, sill and, where applicable,
mullions which, when assembled, house the door, sash or fixed glazing.
Furnace
means a
space-heating appliance using warm air as the heating medium
and usually having provision for the attachment of ducts.
General lighting
means lighting that
provides primary illumination throughout an interior area. General lighting shall not include decorative
lighting or lighting that provides a dissimilar level of illumination
within that area to serve a specialized application or feature.
Grade
means the lowest of the average levels of finished ground adjoining
each exterior wall of a building, except
that localized depressions need not be considered in the determination
of average levels of finished ground. (See
First storey.)
Gross lighted area
means the total
area served by interior lighting, including
the areas occupied by partitions but excluding
areas occupied by exterior enclosing assemblies and by elevator and
service shafts. (See Appendix A.)
Heat trap
means an energy-conserving
arrangement of the water piping entering or leaving a service water heater constructed to counteract
the convective forces of the hot water (thermosyphoning) during standby
periods.
Integrated coefficient of performance
(ICOP) means a single-number figure of merit expressing cooling part-load
COP efficiency for commercial unitary air-conditioning and heat pump
equipment that is based on weighted operation at various load capacities
of the equipment (analogous to IEER).
Integrated energy-efficiency ratio
(IEER)
means a single-number figure of merit expressing cooling part-load
energy efficiency for air-conditioning and heat pump equipment that
is based on weighted operation at various load capacities of the equipment,
as described in the standards referenced in this Code.
Integrated part-load value
(IPLV) means
a single-number figure of merit based on part-load energy-efficiency ratio or coefficient of performance expressing part-load
efficiency for air-conditioning and heat pump equipment that is based
on weighted operation at various load capacities of the equipment,
as described in the standards referenced in this Code.
Interior lighting
means
- lighting installed in spaces that are within the building envelope, and
- lighting installed in unconditioned or conditioned spaces that are sheltered from the outdoor environment
and intended to light only those spaces, except for lighting at exterior entrances and exterior exits.
(See Appendix A.)
Landscape lighting
means lighting installed
to highlight landscape elements, such as trees, shrubs, rocks and
pools. Landscape lighting does not include
lighting of exterior spaces or walkways.
Occupancy
means the use or intended use of a building or part thereof for the shelter or support of persons, animals or
property.
Opaque building assembly
means a building assembly that is part of the building envelope, other than doors, and
does not admit light.
Overall thermal transmittance
(U-value)
means the rate, in W/(m
2·K), at which heat is transferred
through a building assembly that is subject
to a temperature difference. It represents the amount of heat transferred
through a unit area in a unit of time induced under steady-state conditions
by a unit temperature difference between the environments on its two
faces. The U-value reflects the capacity of all elements to transfer
heat through the thickness of the assembly, as well as, for instance,
through air films on both faces of above-ground components. Where
heat is not transferred homogeneously across the area being considered,
the overall thermal transmittance shall be determined. (See Appendix A.)
Partition
means an interior wall one storey or part-storey in height that is not
loadbearing.
Plenum
means a chamber forming part of an air duct system.
Primary system
means the combination
of equipment working as a system that converts electricity or fuel
to heating or cooling and may distribute it to one or more secondary systems (e.g. boilers and chillers), where such equipment is not already
defined as part of the secondary system.
Repair garage
means a building or part thereof
where facilities are provided for the repair or servicing of motor
vehicles.
Return duct
means a duct for conveying air from a space being heated, ventilated
or air-conditioned back to the heating, ventilating or air-conditioning
appliance.
Sash
means an assembly of secondary
framing members that fits within the primary frame of a window and whose main purpose is to hold and support the glass
in operable windows; however, a sash is
often included in fixed windows to maintain a uniform appearance with
operable windows.
Seasonal energy-efficiency ratio
(SEER)
means the total cooling, in Btu, provided by a central air conditioner
or heat pump during its normal annual usage period for cooling, divided
by its total electric power usage, in watt-hours, during that same
period.
Secondary system
means a system that
provides air for the purposes of ventilating, heating and cooling
a thermal block (e.g. fan system). Secondary systems may include dedicated equipment
that converts electricity or fuel to heating or cooling. Secondary systems can be single-zone—serving
only a single thermal block—or multiple-zone—serving
one or more thermal blocks.
Service water
means water for plumbing
systems, but not water for systems used exclusively for space-heating
or -cooling, or for processes.
Sidelighting
means the illumination
of building interiors with daylight admitted
through fenestration located on an exterior
wall, such as windows.
Skylight
means a form of fenestration that is inclined less than 60° from
the horizontal.
Standby losses
(SL) are the heat losses
incurred by a storage-type service water heater under a stable condition when no water is withdrawn from the tank
and the water temperature is held constant by the thermostats.
Storage garage
means a building or part thereof
intended for the storage or parking of motor vehicles and containing
no provision for the repair or servicing of such vehicles. (See Appendix A.)
Storey
means that portion of a building that
is situated between the top of any floor and the top of the floor
next above it, and if there is no floor above it, that portion between
the top of such floor and the ceiling above it.
Suite
means a single room or series of rooms of complementary use, operated
under a single tenancy, and includes dwelling
units, individual guest rooms in motels, hotels, boarding houses,
rooming houses and dormitories, as well as individual stores and individual
or complementary rooms for
business and personal
services occupancies
. (See Appendix .)
Supply air handler
means that part of
a heating, ventilating and air-conditioning system that conditions
return air and/or outdoor air and delivers it to the supply ducts.
Supply duct
means a duct for conveying air from a heating, ventilating or air-conditioning
appliance to
a space to be heated, ventilated or air-conditioned.
Theatre
means a place of public assembly intended for the production and
viewing of the performing arts or the screening and viewing of motion
pictures, and consisting of an auditorium with permanently fixed seats
intended solely for a viewing audience.
Thermal block
means a space or group
of spaces that is considered as one homogeneous space for modeling
purposes. A thermal block shall be:
- one temperature-control zone,
- a group of temperature-control
zones
- that are served by the same secondary
system or by systems that can be considered to be identical,
- that are operated and controlled in the same way, and
- whose space use and envelope characteristics are sufficiently
similar that the heating and cooling energy consumption obtained by
modeling the group of zones as a thermal block is not significantly different from what would be obtained by summing
the results for the individual zones modeled separately, or
- a zone consisting entirely of indirectly conditioned spaces.
Thermal efficiency
(E
t) means
a measure of the efficiency of fuel-burning equipment in converting
fuel to heat, as obtained through the procedures described in the
standards referenced in this Code.
Toplighting
means the illumination
of building interiors with daylight admitted
through fenestration located on the roof,
such as skylights and roof monitors.
Unit heater
means a suspended
space heater with an integral air-circulating fan.