TM54 Operational Energy Performance: Bridging the Performance Gap

Mar 03, 2024By Energy Digest

1 Minute Read-Time

Introduction to TM54


The TM54 Operational Energy Performance framework stands as a critical tool for the construction and design industry, aiming to bridge the notorious 'performance gap' between predicted and actual building energy usage. Unlike standard regulatory compliance calculations, TM54 leverages dynamic simulation modelling to offer a more accurate estimate of a building's operational energy consumption, taking into account realistic occupancy profiles for heating, cooling, fans, and pumps​​​​.

Understanding the Performance Gap


The performance gap arises from discrepancies between modelled and actual building performance, often leading to unexpected costs and sustainability challenges. Traditional assessments for building compliance focus on space and water heating, lighting, and ventilation, excluding energy consumption from appliances and specific non-domestic equipment, which contributes significantly to this gap​​.

Benefits of TM54 Assessment


TM54 provides a multitude of benefits for building design and operational planning, including:

Dynamic Thermal Modeling: Allowing the review of design proposals against operational energy targets.

Design and Operational Strategy: Informing the development of design, controls, and operational strategy to meet specific energy efficiency goals.

Realistic Performance Targets: Helping produce more accurate in-use performance calculations based on expected building usage​​​​.

Practical Applications


Implementing TM54 can significantly impact building design and operational efficiency. By addressing unregulated energy uses and improving the accuracy of operational energy predictions, TM54 plays a pivotal role in achieving energy efficiency and sustainability targets​​​​.