NSW Part 2.6 Energy efficiency performance provisions
Delete the Performance Requirements and Verification Methods of Part 2.6 and substitute NSW provisions as follows:
NSW P2.6.1(a) Building fabric
Thermal insulation in a building must be installed in a manner and have characteristics, which facilitate the efficient use of energy for artificial heating and cooling.
A building must have, to the degree necessary, thermal breaks installed between the framing and external cladding, to facilitate efficient thermal performance of the building envelope.
- NSW P2.6.1(a) only applies to thermal insulation in a Class 1 or 10 building where a development consent specifies that the insulation is to be provided as part of the development.
- In (a), the term development consent has the meaning given by the Environmental Planning and Assessment Act 1979.
- NSW P2.6.1(a)(ii) only applies to a metal framed roof and a metal framed wall.
- In NSW, provision of thermal insulation of the building fabric may be nominated as a commitment on a BASIX (Building Sustainability Index) Certificate and form part of the conditions of development consent or complying development certificate relating to the development.
- BASIX is applicable to alterations and additions the cost of which exceeds specified minimum values, or where an applicant elects to comply with BASIX. Where BASIX is not applicable, a council's development controls may also specify the provision of thermal insulation in such alterations or additions.
- Thermal breaks between metal framing and cladding material of minimum thickness will reduce energy loss and contribute to the efficient thermal performance of the building.
NSW P2.6.1(b) Building sealing
A building must have, to the degree necessary, a level of building sealing against air leakage to facilitate the efficient use of energy for artificial heating and cooling appropriate to—
the function and use of the building; and
the internal environment; and
the geographic location of the building.
NSW P2.6.1(b) does not apply to—
- existing buildings being relocated; or
- Class 10a buildings—
- without a conditioned space; or
- for the accommodation of vehicles; or
- parts of buildings that cannot be fully enclosed; or
- a permanent building opening, in a space where a gas appliance is located, that is necessary for the safe operation of a gas appliance; or.
- a building in climate zones 2 and 5 where the only means of air-conditioning is by using an evaporative cooler.
- The term "cannot be fully enclosed" means parts of buildings with permanent openings such as balconies, shade rooms, rooms with fixed louvres, mesh or other material that allows air flow. Adjustable louvres are considered to provide full enclosure to the opening they accommodate. Such rooms are unlikely to be conditioned given the high air flow rates; therefore application of the Performance Requirement to these parts of buildings would not result in reduction in energy use.
- Appropriate ventilation for gas appliances can be obtained from relevant legislation, referenced standards and product installation manuals.
NSW P2.6.2 Services
Domestic services, including any associated distribution system and components must, to the degree necessary, have features that facilitate the efficient use of energy appropriate to—
the domestic service and its usage; and
the geographic location of the building; and
the location of the domestic service; and
the energy source.