NT Part H6 Energy efficiency
Introduction to this Part
This Part is intended to improve the efficient use of energy in building design and construction, as well as the energy usage by key equipment installed in a building.
NT H6O1 ObjectiveNew for 2022
This Objective of this Part is to reduce energy consumption and reduce gas emissions.
NT H6F1 Greenhouse gas emissionsNew for 2022
To reduce greenhouse gas emissions, a building, including its domestic services, is to be capable of efficiently using energy.
Domestic services means the basic engineering systems of a house that use energy or control the use of energy; and—
- heating, air-conditioning, mechanical ventilation and artificial lighting; and
- pumps and heaters for swimming pools and spa pools; and
- heated water systems; and
- onsite renewable energy equipment; but
- excludes cooking facilities and portable appliances.
NT H6P1 BuildingNew for 2022
A building must have, to the degree necessary, a level of thermal performance 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; and
- the effects of nearby permanent features such as topography, structures and buildings; and
- solar radiation being
- utilised for heating; and
- controlled to minimise energy for cooling; and
- the sealing of the building envelope against air leakage; and
- the utilisation of air movement to assist cooling.
NT H6P2 Energy usageNew for 2022
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—
NT H6V1 Application of H6V2New for 2022
The Verification Method in this Part only apply to—
- a Class 1 building; and
- an enclosed Class 10a building attached to a Class 1 building.
The Verification Method in this Part is intended to apply to whole Class 1 buildings and to whole Class 1 buildings that incorporate attached and enclosed Class 10a parts such as attached garages. The Verification Method is not intended to apply to detached garages or open carports.
NT H6V2 Verification using a reference buildingNew for 2022
- thermal calculation method; and
- location specific data, including that of climate and topography appropriate to the location where the proposed building is to be constructed if the data is available, or the nearest location with similar climatic conditions in the same climate zone for which the data is available; and
- impact of adjoining structures and features; and
- soil conditions; and
- orientation; and
- floor plan, including the location of glazing; and
- number of storeys; and
- solar absorptance of external surfaces; and
- roof cladding; and
- separating walls; and
- external non-glazed doors; and
- intermediate floors; and
- floor coverings; and
- internal zones; and
- internal heat gains including people and appliances.
- the building fabric; and
- glazing and shading; and
- air infiltration and ventilation; and
- the function and use of the building including zoning, hours of occupation, hours of heating and cooling availability and internal heat gains; and
- space temperature settings in the range 20ºC to 21ºC for heating and 25ºC to 28ºC for cooling; and
- relevant built-environment and topographical features; and
- the sensible heat component of the cooling load and heating load.
NT H6D1 Deemed-to-Satisfy ProvisionsNew for 2022
NT H6D2 Application of Part H6New for 2022
- a building must achieve an energy rating, using house energy rating software, of greater than or equal to 5 stars; or
- complying with the following parts of the ABCB Housing Provisions—
There are two options for complying with the energy efficiency Performance Requirements: