Operational Energy Modelling Guidance

The following guidance documents provide best-practice recommendations for operational energy modelling and building performance simulation. They cover topics such as modelling methodologies, assumptions, building physics fundamentals, operational profiles, performance targets and the interpretation of results. Together, they help building physicists develop more robust energy models and better understand how design decisions influence a building’s energy performance in operation.

LETI Operational Modelling Guide
Provides practical guidance on operational energy modelling, including modelling methodologies, assumptions, data inputs, scenario testing and reporting. It helps building physicists assess how design decisions may affect a building’s energy use once occupied.

IES Fundamentals of Building Performance Modelling
Provides an introduction to the core principles of building performance modelling, including building physics, heat transfer, weather data, occupant behaviour, HVAC systems, thermal comfort and energy modelling techniques. It serves as a useful reference for understanding the fundamental concepts that underpin operational energy modelling and building performance simulation.

NABERS Design for Performance (DfP) Guide
Provides guidance on how to model, assess and manage a building’s operational energy performance using the NABERS framework. It covers topics such as energy modelling assumptions, occupancy and equipment profiles, HVAC operation, controls, metering, performance risks and post-occupancy verification. While developed to support NABERS ratings, it is also a valuable reference for developing realistic operational energy models.