Energy efficiency is a core focus of our work program and forms part of the Australian, state and territory governments’ strategies to improve energy productivity and reduce greenhouse gas emissions.

NCC 2025 Energy Efficiency

Work is underway to scope potential changes for commercial building energy efficiency in NCC 2025. Among other things, the work will focus on increasing the role that this sector can play in helping all Australian jurisdictions reach their emissions reduction targets.

NCC 2022 Energy Efficiency

This project was initiated by the former Council of Australian Governments (COAG) Energy Council’s National Energy Productivity Plan and Trajectory for Low Energy Buildings.

The emphasis of the NCC 2022 energy efficiency provisions was on residential buildings. This included an increase in the level of thermal comfort and a whole-of-house energy use budget.

The provisions also included measures that will reduce the cost of installing on-site renewables and electric vehicle charging at a later date.

Extensive expert and stakeholder consultation have informed the final provisions included in NCC 2022, which will be published on 1 October 2022. The provisions will be adopted on 1 May 2023, with a transition period applying until 1 October 2023 to assist industry in preparing for the changes.

Condensation in buildings

To reduce condensation risk in residential buildings, a program of work was introduced to develop NCC condensation mitigation provisions in three stages.  The first two stages resulted in provisions being included in NCC 2019 and NCC 2022.  Work is now underway to further reduce condensation risk through NCC 2025.

Guidance material has also been made available to assist with minimising condensation in buildings.

NCC Energy Efficiency resources

The ABCB has also produced an extensive range of resources to help practitioners understand and implement the energy efficiency requirements of the Code. These are linked in the table below.

These resources also include reports produced for the ABCB by third-party consultants, which have been used to support the writing of the NCC and its supporting material. Note, the reports’ findings are not necessarily reflected in the NCC’s provisions, which draw upon many inputs through consultation and analysis.

EditionPublishedArticles and resources Type
NCC 20222022/10NCC Whole of Home Calculator (beta release)Calculator
NCC 20222022/10NCC 2022 Volume One lighting calculator (beta release)Calculator
NCC 2022 2022/10 NCC 2022 Volume Two lighting calculator (beta release)Calculator
NCC 20222022/10NCC 2022 Volume One glazing calculator (beta release) (Class 2 & 4)Calculator
NCC 20222022/10NCC 2022 Volume Two glazing calculator (beta release)Calculator
NCC 20222022/10Repeating thermal bridges in ceilings and floors: simuation and calculation, Stage 1 Final ReportReport
NCC 20222022/10Repeating thermal bridges in ceilings and floors: modified calculation method, Stage 2 Final ReportReport
NCC 2022 2019/12 NCC 2022 energy efficiency project: Rationale and scope Factsheet
NCC 2022 2019/12 NCC 2022 energy efficiency project: Development process Infographic
NCC 2022 2019/12 Energy efficiency: NCC 2022 and beyond outcomes report Report
NCC 2022 2019/12 Energy efficiency: NCC 2022 and beyond scoping study Consultation
NCC 2022 2020/04 NCC 2022 Residential energy efficiency FAQs
NCC 2019 2020/12 Façade Calculator video YouTube Clip
NCC 2019 2020/04 Façade Calculator NCC 2019 Volume One Calculator
NCC 2019 2020/04 Lighting Calculator NCC 2019 Volume One Calculator
NCC 2019 2020/04 Fan system Calculator NCC 2019 Volume One Calculator
NCC 2019 2020/04 Pump system Calculator NCC 2019 Volume One Calculator
NCC 2019 2020/04 Glazing Calculator NCC 2019 Volume Two Calculator
NCC 2019 2020/04 Lighting Calculator NCC 2019 Volume Two Calculator
NCC 2019 2020/01 Fan system Calculator video YouTube Clip
NCC 2019 2020/01 Pump system Calculator video YouTube Clip
NCC 2019 2020/01 Verification using a reference building YouTube Clip
NCC 2019 2020/01 Building sealing verification YouTube Clip
NCC 2019 2020/04 Adaptive Thermal Comfort and Predicted Mean Vote Performance Scenario
NCC 2019 2020/04 Verification using NABERS Energy for Offices (JV1) Performance Scenario
NCC 2019 2020/04 Verification using Green Star (JV2) Performance Scenario
NCC 2019 2020/04 Verification using a reference building (JV3) Performance Scenario
NCC 2019 2020/05 Lighting refurbishment of an office building Case Study
NCC 2019 2020/05 Small office building Case Study
NCC 2019 2020/05 Hotel façade Case Study
NCC 2019 2019/07 Energy efficiency NCC Volume One Handbook
NCC 2019 2019/07 Energy efficiency NCC Volume Two Handbook
NCC 2019 2018/02 NatHERS heating and cooling load limits ABCB Standard
NCC 2019 2018/02 Inclusion of heating and cooling energy load limits in NatHERS assessment RIS (Final)
NCC 2019 2018/02 Energy Action Modelling and Sensitivity Analysis Report
NCC 2019 2018/02 Energy efficiency of commercial buildings RIS (Final)
NCC 2019 2018/02 Energy efficiency of commercial buildings NCC 2016 vs NCC 2019 DTS modelling report Report
NCC 2022 2018/02 Residential energy efficiency: heating and cooling load limits Report
NCC 2019 2020/06 NCC Volume Two, Energy Efficiency  NCC Essentials
NCC 2019 2020/06 NCC Volume One, Energy Efficiency NCC Essentials
NCC 2019 2020/07 Energy Efficiency requirements for fans in unitary AC equipment Advisory Note
NCC 2019 2020/07 Energy efficiency of fan systems Performance Scenario
NCC 2019 2020/07 Single storey house energy efficiency Performance Scenario
NCC 2019 2020/07 Eurovent Standards for chillers Performance Scenario
NCC 2019 2020/01 Section J Transformed: Stepping into energy change for commercial buildings YouTube Clip