Atelier Ten – Optimising Green Mark Compliance with IESVE

Singapore

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Atelier-Ten has been using IES Virtual Environment (IESVE) as their primary building performance simulation tool to deliver Green Mark certified projects throughout Singapore. Their expertise with the software has been instrumental in helping clients achieve higher-tier certifications including Green Mark GoldPlus, Platinum, and Super Low Energy (SLE) designations across a diverse portfolio of developments.

Key Facts

  • 10+ Green Mark projects completed using IESVE, many achieving GoldPlus or Platinum certification
  • IESVE enables accurate simulation of building energy use in Singapore's tropical climate
  • Key advantage: comprehensive HVAC system modeling capabilities for Green Mark verification

Atelier-Ten chose IESVE because it offers an advanced, dynamic simulation platform that directly supports Green Mark's performance-based approach to energy efficiency. Specifically, it enables them to model building energy use in detail, taking into account Singapore's climate, occupancy patterns, internal loads, HVAC configurations, and renewable energy integration.

Atelier-Ten has used IESVE on 10+ projects, many of which have achieved Green Mark GoldPlus or Platinum certification.

Embedding IESVE into their workflow across concept, design development, and documentation stages, the software allows them as sustainability consultants to assess the building's performance iteratively—helping shape envelope design, system sizing, and passive strategies early in the process to ensure compliance with key Green Mark energy-related criteria.

For Atelier-Ten the greatest benefits of using IESVE for Green Mark are:

  • Accurate Green Mark Compliance: IESVE enables them to simulate building-level energy consumption in accordance with GM:2021 methodologies, ensuring compliance with EUI and system efficiency thresholds.
  • Advanced HVAC Modelling: The software provides detailed HVAC system simulation—chiller efficiency, plant load profiles, and part-load performance—which are essential for Green Mark verification.
  • Climatic Responsiveness: With Singapore's humid tropical climate, modelling ventilation strategies, envelope performance, and solar gains is crucial, and IESVE allows for this level of detail.

Green Mark assessments often require comprehensive proof of system efficiency and operational performance. With this in mind, IESVE helps the Atelier-Ten team to overcome several key challenges:

  • Complex Load Profiling: IESVE supports zoning and diversity profiles to represent realistic operational scenarios, which are important for multi-use buildings.
  • Chilled Water Plant Modelling: For large developments, the team can simulate central cooling plants with precision, including plant configurations, COPs, and control strategies.
  • Comparative Baseline Modelling: IESVE facilitates baseline-versus-proposed comparisons, which are essential for demonstrating energy improvement and securing targeted points.

These capabilities reduce the reliance on overly conservative assumptions and allow Atelier-Ten to justify innovative energy-saving strategies with confidence.

Project Example Mandai Eco-resort 

To achieve the GM2015 Super Low Energy for this project, the Atelier-Ten team used IESVE to:

•    Analyse façade strategies for peak load reduction, including double-skin glazing and dynamic shading.
•    Model a high-efficiency chilled water system and passive cooling in the Treehouse Suites.
•    Validate energy savings through baseline and proposed design comparisons of each of the proposed Energy Conservation Measures.

These simulations were essential for demonstrating a >30% energy improvement over the reference model and securing top-tier certification.

“We chose IESVE because it offers an advanced, dynamic simulation platform that directly supports Green Mark’s performance-based approach to energy efficiency. Specifically, it enables us to model building energy use in detail, taking into account Singapore’s climate, occupancy patterns, internal loads, HVAC configurations, and renewable energy integration.”
Ian Yeh, Associate, Atelier-Ten

The team continues to expand their use of IESVE's advanced modules for upcoming Green Mark 2021 submissions, where more stringent energy targets and a greater emphasis on operational performance require increasingly sophisticated simulation approaches to demonstrate compliance.

New to or considering IESVE for Green Mark Assessments? Advice from Atelier-Ten...
"Invest time in understanding the full modelling workflow and structure your model to reflect Green Mark's baseline vs proposed methodology from the outset. Align closely with M&E consultants on system details and control logic early, as this greatly impacts modelling accuracy. Lastly, leverage IESVE's modular capabilities—such as ApacheHVAC and MacroFlo—for projects targeting higher tiers like GM SLE or Platinum, where detailed simulation is not just beneficial but essential." 
Ian Yeh, Associate, Atelier-Ten


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