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Dear Architect: Stop Ignoring Thermal Performance Until It’s Too Late​ 

by | Jun 25, 2025 | NatHERS

An open letter to the design community on the urgent need to integrate energy efficiency from the outset. 

Dear Architect, 

Let’s talk about a recurring issue in our industry. Time and again, energy assessors are brought into projects at the eleventh hour—after designs are finalized, materials selected, and planning approvals secured. Only then are we asked to ensure compliance with the National Construction Code (NCC) and achieve the desired Nationwide House Energy Rating Scheme (NatHERS) star rating.​ 

This approach often leads to costly redesigns, project delays, and compromises that could have been avoided with early collaboration.​ 

The Cost of Late-Stage Energy Assessment 

Engaging energy efficiency consultants late in the design process can result in significant setbacks. For instance, a project may meet aesthetic and functional goals but fall short of energy performance standards. Rectifying this might involve altering window sizes, changing insulation specifications, or reconfiguring layouts—all after construction documents are prepared.​ 

These adjustments are not only expensive but can also compromise the original design intent. Moreover, they can delay project timelines, affecting client satisfaction and increasing costs. (​MDPI)

The Benefits of Early Integration 

Incorporating energy efficiency considerations from the outset offers numerous advantages:​ 

  • Optimized Design: Early collaboration allows for the integration of passive design strategies, such as optimal building orientation, natural ventilation, and appropriate shading, enhancing thermal comfort and reducing energy consumption.​ 
  • Cost Savings: Identifying energy efficiency measures early can reduce the need for expensive retrofits or design changes later in the process.​ 
  • Regulatory Compliance: Early engagement ensures that designs meet or exceed NCC requirements, streamlining the approval process.​ 
  • Enhanced Sustainability: Proactive energy planning contributes to broader sustainability goals, aligning with Australia’s commitment to reducing greenhouse gas emissions.​ 

A Call to Action 

As architects and designers, we have a responsibility to create buildings that are not only aesthetically pleasing but also energy-efficient and sustainable. This requires a shift in our workflow to prioritize energy performance from the beginning.​ 

By fostering early collaboration with energy assessors, we can design buildings that meet regulatory standards, satisfy client expectations, and contribute positively to the environment.​ 

Conclusion 

Ignoring thermal performance until the final stages of design is a practice that undermines the integrity of our work and the sustainability of our built environment. Let’s commit to integrating energy efficiency into our design processes from the start, ensuring that our projects are both beautiful and responsible.​ 

Sincerely, 

An Advocate for Sustainable Design 

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