With the UK moving closer towards more ambitious climate objectives, like net zero by 2050, the building sector comes under increased pressure to enhance energy performance. Traditional energy forecasts are often pessimistic, underestimating real-world energy usage. TM54 assessments come in here, with a more realistic approach to modeling operational energy and meet evolving energy efficiency compliance guidelines in the UK.
What is a TM54 Assessment?
TM54 evaluation is a comprehensive energy modelling technique created by CIBSE. It determines the likely operational energy usage of a building, bridging the performance gap between actual and predicted energy consumption in practice and at design stage.
Whereas standard EPCs focus on regulated loads, TM54 energy modeling addresses all aspects of energy consumption, including unregulated loads such as IT equipment and plug-in devices. It is for this reason that TM54 becomes crucial to provide accurate energy projections and maintain net zero building standards in the UK.
Why TM54 is Critical to Achieve Net Zero in Building Design
Achieving net zero by building design requires more than box-ticking against idealized models. A TM54 calculation provides a more integrated approach to predicting building energy use by modeling occupant habits, plant operation, and climatic conditions.
It is essential to the design of buildings meeting operational energy and net zero aspirations defined in the Future Homes Standard and the Building Regulations Part L 2025 updates.
TM54 and UK Building Regulations Compliance
With UK building regulations Part L 2025 now active, the need for accurate, performance-based modelling is growing. TM54 assessments facilitate compliance by determining energy-saving opportunities at the initial stages of the design process so that clients can confidently attain energy efficiency compliance requirements.
CCA Environmental integrates TM54 modelling within thorough sustainability analysis, ensuring your projects are MEES compliant for commercial property, especially those targeting Level 5 EPC for high-rise buildings.
TM54’s Role within EPC and MEES Compliance
Commercial properties requiring advanced compliance are supported by TM54 reports in combination with Dynamic Simulation Modelling (DSM) and EPCs. While a Level 5 EPC addresses intricate HVAC and architecture, TM54 offers an additional level of operational insight.
We also help clients become MEES compliant on non-domestic buildings with an EPC Plus report for MEES, so your asset not only thrives on paper but also operates effectively in reality.
Who Should Use TM54 Surveys?
TM54 surveys are extremely beneficial for:
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- New buildings with net zero performance aspirations
- Retrofit schemes that are sustainability-oriented
- Large or complex buildings requiring Level 5 EPCs
- Clients who want to exceed or meet UK minimum energy performance standards EPC
Why Hire CCA Environmental?
We excel at CCA Environmental in guiding developers, landlords, and property managers through the intricacies of environmental legislation. Our services include:
From addressing sustainable building practice through to future-proofing your assets, our team delivers real, data-driven solutions.
Frequently Asked Questions
Q: How is TM54 different from a traditional EPC?
A: TM54 reports actual energy consumption when buildings are operating, while EPCs report only regulated loads. TM54 paints a better picture of real building performance.
Q: Do the new Part L regulations make TM54 compulsory?
A: While not yet mandatory, TM54 is more and more encouraged by regulators and highly recommended for buildings looking to reach net zero aspirations.
Q: Which building types are most helped by TM54 modelling?
A: High-specification, high-occupancy or complex buildings are most helped, particularly those seeking Level 5 EPCs or MEES compliance.
