A - D


1 Star, 2 Star, 3 Star, 4 Star or 5 Star: in relation to an electrical system or appliance, means the Energy Star Rating as determined under the Electricity Safety (Equipment Efficiency) Regulation 1999 and, in relation to a gas system or appliance, means the Energy Star Rating as specified by the Australian Gas Association (AGA).

1 star, 2 star, 3 star, 4 star, 5 star or 6 star: In relation to a water using fixture or appliance (clothes washer and dishwasher), means the fixture or appliance is rated to that level of water efficiency in accordance with AS/NZS 6400:2005 Water efficient products rating and labelling.


Accredited Assessor: means a person accredited by an Accrediting Organisation to conduct Simulations for the Thermal Comfort Index of BASIX. 

Active power factor correction:means the correction of the power factor of an electrical system by equipment in order to reduce power losses in the supply of electricity to that system.

Alternative energy system: means a system which generates electricity on the land the subject of the application, using an energy source other than the electricity supply grid, and includes a photovoltaic power system and a wind generator.

Alternative water: means water that is not mains-supplied potable water.

Alternative water supply system: means a system that supplies water other than mains-supplied potable water.

Assessor Certificate: means a certificate issued by an Accredited Assessor in accordance with the Thermal Comfort Protocol.

Attached dwelling house: means a dwelling which is attached to, or less than 0.5m from, any other dwelling or building (excluding a garage or carpark), but which does not have another dwelling or building (excluding a garage or carpark) above or below it, such as a semi-detached house, terrace house, row house or townhouse.


Biodiesel: means an alternative diesel fuel that is not petroleum based, but is made from renewable resources such as vegetable oils, animal fats or algae.

Breeze path: means a path of air flow within a dwelling between two ventilation openings.

Building Code of Australia: means the document published by or on behalf of the Australian Building Codes Board, together with:

(a) such amendments made by the Australian Building Codes Board, and

(b) such variations approved by the Australian Building Codes Board in relation to New South Wales.

Building Management System (BMS): means a system designed to control, monitor and optimise various building services, including lighting, heating, ventilation, cooling, swimming pool pumps and water use in cooling towers.


Central ducted: in relation to a ventilation system, means a system where mechanical ventilation is provided from a central ventilation system.

Central system or facility: means a system or facility that services more than one dwelling.

Closed system: in relation to a fire sprinkler test water system, means a system where water used to test the fire sprinkler system is stored for reuse during the next test.

CO monitoring: in relation to a carpark efficiency measure, means an off/on switching based on monitored levels of carbon monoxide.

Coefficient of Performance (COP): in relation to cooling and heating systems, means the capacity of output divided by the power input.

Cogeneration heat: means the usable heat that is directly produced by a cogeneration system.

Cogeneration heat absorption: means absorption chilling that is driven by cogeneration heat.

Cogeneration heat boiler: means a boiler that is heated using cogeneration heat.

Cogeneration system: means a system that simultaneously produces power (electrical or mechanical) and cogeneration heat (for example to heat water) from the same fuel in a single thermodynamic process.

Committed capacity: in relation to a system, means the capacity which the system was required to have at the time it was installed, under any earlier development consent or complying development certificate.

Common area: means an area, within a development comprising more than one dwelling, that may be used by the occupants of more than one dwelling or which services more than one dwelling, and includes shared landscaped area, a gym, carpark, switch room and garbage room.

Conditioned floor area: in relation to a dwelling, means the total floor area of the dwelling, excluding: a) floor area that is not fully enclosed; b) bathrooms (but not ensuites) and laundries, with a ventilation opening; and voids, store rooms, garages and carparks.

Conductivity controller: in relation to a cooling tower or evaporative cooling system, means a device used to manage the concentration of dissolved solids by automatically controlling waterbleed.

Cooling load: for a dwelling, means the value specified for cooling load on an Assessor Certificate for the dwelling.

Cooling tower: means a device for lowering the temperature of water by evaporative cooling, where atmospheric air is in contact with falling water, thereby resulting in the exchange of heat.

Corrected cooling load: means the cooling load adjusted by BASIX to account for any complying breeze paths in the dwelling.


Dedicated: in relation to light fittings, means a light fitting that is only capable of accepting fluorescent or LED (Light Emitting Diode) lamps. It will not accept incandescent, halogen or any other non-fluorescent or non-LED lamps.

Dwelling: means a room or suite of rooms occupied or used or so constructed or adapted as to be capable of being occupied or used as a separate domicile.