Trial / Demo
IESVE thermal modelling was central to delivering Malaysia's first public hospital designed and built to achieve Green Building Index (GBI) certification. And it’s a facility that’s since been recognised with Malaysia's National Energy Award 2026 for Large Green Building and Energy Efficient Design.
Hospitals present some of the most demanding conditions in building energy modelling and the Cyberjaya Hospital in Selangor, Malaysia is no different. Around-the-clock operation, highly varied clinical environments, from sterile operating theatres to intensive care units to diagnostic laboratories, and the critical importance of maintaining precise environmental conditions at all times mean that the stakes attached to accurate energy prediction are exceptionally high.
Modelling a high-performance hospital against stringent green-benchmarks
For Cyberjaya Hospital, the energy engineering and sustainability consultancy was led by KVA Green Consultancy, with IESVE used to model the facility's predicted energy consumption against the GBI Energy Efficiency benchmark for hospitals.
The primary objective was to demonstrate a BEI below 212 kWh/m² year, the threshold required to score a minimum of 10 credits under GBI's EE5 category. IESVE's thermal modelling confirmed a projected BEI of 207 kWh/m² year, with component-level energy distribution providing the detailed breakdown needed to validate performance across the facility's diverse operational systems and to support the GBI submission with defensible, simulation-backed evidence.
Engineering a high-efficiency chilled water plant
A key focus of the energy strategy was the design and engineering of the central chilled water plant, the dominant energy system in a tropical-climate hospital of this scale and complexity. KVA Green Consultancy used IESVE to develop and validate a variable primary flow (VPF) chiller configuration incorporating condenser heat recovery and reheat, a strategy that allows waste heat from the cooling process to be captured and reused rather than rejected. The resulting plant efficiency of 0.71 kW/RT reflects a level of performance that requires careful system integration and precise modelling to achieve and demonstrate credibly.
Alongside the chilled water plant, the facility integrates rooftop solar photovoltaics, rainwater harvesting, and high-efficiency lighting, a combined strategy that positions Cyberjaya Hospital as a reference point for low-energy public healthcare infrastructure in Malaysia.
A national benchmark for green healthcare design
Handed over to the Ministry of Health Malaysia in June 2021 following a project commencement in 2017, Cyberjaya Hospital represents a significant milestone in Malaysia's public health estate, demonstrating that GBI certification and genuine low-energy performance are achievable within the constraints of public sector procurement. The facility's recognition at the National Energy Awards 2026, under both the Large Green Building and Energy Efficient Designed Building categories, reflects the long-term value of that investment.
“IESVE provided the analytical foundation that made it possible to design to these standards with confidence, modelling the interaction between complex clinical systems, high-efficiency plant, and renewable energy integration in a way that gave the project team the evidence needed to target, verify, and ultimately achieve its performance ambitions.”
Pua Ching Tian, Sustainability and Energy Efficiency Expert
