A Holistic View of Home Energy Performance
We work closely with architects, builders, and building designers to deliver Whole of Home assessments that align with your design goals and regulatory obligations. Our team simplifies the process, helping you integrate efficient systems and appliances into your project.
Heating & Cooling Systems
We assess the energy efficiency of your air conditioner systems to ensure optimal performance and WoH compliance.
Hot Water & Lighting
We evaluate water heating and lighting systems through energy efficiency assessment to reduce energy consumption and improve comfort.
Appliances & Renewable Energy
We consider the impact of major appliances and solar PV systems to provide a complete energy profile.
Integration with NatHERS
Whole of Home assessments complement NatHERS ratings—offering a more complete picture of your home’s energy use.
Beyond the Building
Envelope
New home energy rating standards have evolved. It’s no longer just about how well a home is designed to retain heat or stay cool, now, it’s also about how efficiently it runs. Under the NCC 2022 updates, new homes are required to meet both a 7-Star NatHERS energy rating for thermal performance and a whole of home rating that measures the energy use of major appliances and systems, including heating, cooling, hot water, lighting, and more.
WoH assessments offer a more complete picture of a home’s energy efficiency profile ensuring not only a well-designed building envelope but also smarter decisions when it comes to the equipment installed within it.
What is a Whole of Home Assessment?
With the introduction of NCC 2022, energy efficiency requirements have expanded beyond just the building envelope. The new Whole of Home assessment ensures that homes are designed and built to deliver better comfort, lower energy bills, and reduced environmental impact.
Under Part H6 – Energy Efficiency Provisions, the key objectives for Class 1,
Class 2 and Class 4 buildings are:
Reduce Annual and Peak Thermal Energy Demand
A well-performing building envelope (walls, roof, insulation, windows) plays a critical role in lowering heating and cooling needs. By minimising energy leakage, homes require less artificial heating or cooling—leading to greater comfort and reduced running costs.
Reduce Greenhouse
Gas Emissions
Greenhouse gas emissions are linked to the electricity and gas consumed by building services (heating, cooling, hot water, lighting, etc.). Using efficient systems reduces emissions, while renewable energy solutions such as solar PV can offset or even neutralise a home’s overall carbon footprint.
Reduce Time-of-Use Impact on Energy Networks
Whole of Home also considers how and when a household uses energy. By improving efficiency and integrating renewable systems, homes place less strain on the electricity grid during peak demand periods. This not only benefits the environment but also helps reduce long-term energy costs.
What Are Whole of Home (WoH) Requirements?
The Whole of Home (WoH) assessment is a new requirement introduced under NCC 2022. It goes beyond the building fabric (insulation, glazing, and envelope) and ensures that the domestic services of a home are energy-efficient, helping reduce costs, emissions, and demand on the electricity network.
Which Services Are Assessed?
Energy consultants undertake a WoH assessment to meet Part H6P2 performance requirements. These cover the efficiency and energy use of:
- Space heating and cooling
- Mechanical ventilation
- Artificial lighting and plug in appliances
- Pool and Spa Equipments
- Hot water systems
- On-site renewable energy systems (e.g., solar PV)
What does my Whole of Home Rating mean?
The Whole of Home rating scale ranges from 0 to 100, where a score below 40 indicates a poorly performing home with high energy use, while a score of 100 represents a net zero energy home that produces as much energy as it consumes. Homes achieving a rating above 100 generate more energy than they use, meaning they can operate with little to no energy bills.
Whole of Home provisions are specified under:
- NCC Volume 2 – Part 13.6.2 → For new residential dwellings (Class 1 buildings)
- NCC Volume 1 – Part J3D15 → A sole-occupancy unit of a Class 2 building or a Class 4 part of a building
Note: WoH requirements for Class 2 apartments are generally easier to achieve than for standalone houses.
Need help understanding how the Whole of Home assessment applies to your project? Our experts can guide you through the process and ensure your design meets NCC 2022 compliance.
How We Deliver Whole of Home Reports
Initial Consultation
Book a 20-minute call to discuss your project and determine the whole of home assessment requirements based on NCC 2022.
Data Collection & Plan Review
We gather details on your home’s design, systems, and appliances to build a complete energy efficiency profile for WoH compliance.
Whole of Home Assessment & Reporting
Our team uses accredited tools to model your home’s energy use and prepare a council-ready whole of home report with clear recommendations.
Submission & Support
We assist with submitting your Whole of Home report and provide revisions or clarifications as needed to ensure approval
Have some Questions
What is a Whole of Home assessment?
It’s a performance-based energy assessment that evaluates the total energy use of a home, including systems and appliances, under NCC 2022.
When is a Whole of Home report required?
It’s required for new residential buildings and major renovations under the NCC 2022 energy efficiency provisions.
What does a Whole of Home report include?
It includes energy modelling for heating, cooling, hot water, lighting, appliances, and renewables—alongside NatHERS ratings.
How long does it take to complete a Whole of Home report?
Depending on the size of the home and the documentation available, the timeframe will vary. Please reach out to us to talk about your goals and plans.
Can you help with NatHERS or other energy reports?
Yes! We offer integrated energy ratings services to streamline your WoH compliance process and reduce delays.
Hear From Those We've Partnered With
We take pride in delivering thoughtful, sustainable solutions—and our clients say it best.
“The Torple team has been fantastic over the years in providing detailed energy assessments. Specifically, in being pro-active in providing solutions to star rating shortfalls in an easy manner. I would highly recommend Torple due to their low fuss approach to every project they undertake”
“I have worked with Torple for many years on both residential and commercial projects and they play a valuable role in my business in both design development and the development approval process. They are prompt, efficient and good communicators and provide up-to-date information and advice.”
“Professional, efficient and easy to deal with. The team at Torple constantly deliver accurate reports quickly and provide helpful guidance throughout the process in an ever evolving space. Highly recommend for reliable energy rating assessments”.
“We have been using Torple for 18 Months now and have found them fantastic to deal with. They are solution driven and are always willing to work with us to produce the best outcome for our clients. We look forward to working with Torple for future projects & developments.”
“We love working with Torple to ensure our designs are compliant with NCC requirements for both Residential and Commercial Buildings. We appreciate their in-depth knowledge to help us achieve compliance with Section J requirements. They are highly skilled in their field, easy to work with and a great asset to our company.”
