Modelling Class 2 Apartments: Thermal, Appliances, and the Central Hot Water Proxy

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Price

A$99.00

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Course Content

I. Introduction (5 mins)
II. Learning Objectives (2 mins)
III. Module 1: Challenges of Assessing Class 2 Apartments (15 mins)
IV. Module 2: Central Hot Water System Proxy (10 mins)
VI. Module 4: Documentation and Compliance Strategies (10 mins)
VII. Summary & Key Takeaways (3 mins)
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By the end of this session, you will be able to identify and address the unique challenges involved in modelling Class 2 apartments under the NatHERS and NCC 2022 frameworks. You’ll understand how to accurately represent shared construction elements, complex zoning, and fixed appliance systems in multi-residential buildings. The session will also teach you when and how to apply the central hot water system proxy, and when its use is inappropriate. Additionally, you’ll gain the skills to prepare thorough compliance documentation, including evidence of suitability and proxy justifications. This will ensure your assessments are both accurate and fully compliant with regulatory standards.

Learning Outcomes

  • Explain the specific thermal and compliance challenges associated with Class 2 buildings under NCC 2022 and NatHERS.
  • Identify when performance solutions are required and prepare appropriate supporting documentation.
  • Accurately model thermal shells in NatHERS software, accounting for shared walls, zoning, and exposure.
  • Incorporate and model fixed appliances—such as heating, cooling, water heating, and lighting—for Whole-of-Home assessments.
  • Apply the central hot water system proxy correctly, based on Clause 12.10 of the NatHERS Technical Note.
  • Prepare audit-ready compliance reports that include modelling assumptions, justification of proxies, and evidence of suitability.

This ensures that CPD efforts align with professional regulatory requirements.

This CPD provides general guidance on professional responsibilities and documentation practices. It does not constitute legal advice or replace project-specific contractual or statutory obligations.

  • CPD Points: 1 Formal CPD Point
  • Duration: 1 hour
  • Certificate Upon Completion
  • Difficulty Level: Advanced
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Compliance and Accreditation

Framework/Body

Relevant Sections

Focus Areas

National Construction Code (NCC 2022)

Volume One, Section J; Evidence of Suitability (A5G2–A5G4); Spec 42

Class 2 thermal and Whole-of-Home compliance; central system proxy use; documentation standards; zoning and appliance inclusion per NCC mandates

NatHERS Protocols

Technical Note v20241023, especially Clause 12.10

Whole-of-Home modelling; default appliance profiles; proxy modelling rules for central hot water systems; zoning; software input integrity

ABSA CPD Competency Area

Technical Modelling; Regulatory Knowledge; Reporting

Accurate use of software defaults; fixed appliance inclusion; documentation of assumptions; zoning and layout variance management

Building Designers

Energy Efficiency Modelling; Compliance Reporting

Compliance with NCC and NatHERS for Class 2; proxy selection rationale; WOH appliance documentation; assessor-client communication

NSCA 2021 (Architects)

PC20, PC21, PC28, PC31, PC33, PC45

Thermal modelling principles; statutory planning and environmental performance; project documentation quality; star band limitations

Engineers Australia (Stage 2)

Technical Expertise; Stakeholder Engagement; Systems Thinking

Multi-system interaction (HVAC, hot water, electrical); proxy use and performance metrics; design coordination with architectural and compliance teams

Licensed Builders (State CPD)

Documentation Compliance; Appliance Inclusion

Interpretation of reports; understanding NCC Volume One Section J; assessing design integration and proxy system impacts on energy use

Building Surveyors

NCC Volume One Section J; Verification Methods

Evidence of suitability; thermal and WOH compliance evidence; identifying modelled assumptions versus actual construction plans

This session is designed for

Energy Assessors
Architects
Building Designers
Building Surveyors
Sustainability Consultants

What’s Included

This course covers the key principles and practical steps for accurately modelling Class 2 multi-residential buildings under NatHERS and NCC 2022. It addresses the unique thermal performance challenges of shared walls, repeated layouts, and zoning in apartment settings. The course explains how to use the central hot water system proxy, including when it is appropriate and how to document its use. It also provides guidance on modelling fixed appliances and preparing complete, compliant documentation for regulatory approval.

  • A 1-hour video session covering NCC-aligned strategies and real-world case studies.
  • An interactive quiz to test and reinforce knowledge.
  • An audio summary version via NotebookLM for flexible, on-the-go learning.
  • A downloadable certificate of completion for CPD compliance reporting.
  • Centralised CPD tracking dashboard to support audits and personal recordkeeping.
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Why Take This CPD Session?

Enhance your expertise in modelling complex Class 2 apartment buildings using the latest NatHERS and NCC 2022 requirements.

Avoid common compliance pitfalls by learning when and how to apply proxies, performance solutions, and accurate zoning techniques.

Improve assessment quality and audit readiness with practical guidance on documentation, stakeholder coordination, and Whole-of-Home modelling.

Professional development is an investment in career growth and regulatory compliance. Take the next step today.

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