Ingleton Wood’s multidisciplinary team are experienced in applying TM54 methodology to help clients better understand and optimise their buildings’ energy performance.
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about TM54
site energy consumption
Ingleton Wood’s multidisciplinary team are experienced in applying TM54 methodology to help clients better understand and optimise their buildings’ energy performance. Whether you’re delivering a new development or upgrading an existing site, we can provide robust TM54 assessments, dynamic energy modelling, and practical design recommendations to support energy efficiency, carbon reduction, and long-term cost savings.
Building management, and related training, commissioning, controls and metering have a major impact on how long and at what intensity services or equipment operate each day
Evaluating operational energy forms an important part of demonstrating a building’s energy consumption before it has been handed over to the client, whether that is a new build or refurbishment. As Part L excludes servers, lifts and unregulated systems, the operational energy use can be vastly different to Part L calculations.The ‘TM54:2022 Evaluating operational energy use at the design stage’ document provides a methodology that enables designers to more accurately predict a building’s operational energy consumption, based on the proposed systems and specifications during the design stage. Importantly,TM54 also considers the operational hours and occupancy on a per-room basis. If the building or specific rooms are expected to be used during weekends, or have multiple shifts extending into the night, the predicted energy consumption (and the associated running costs) can be far higher than indicated by standard Part L calculations. While no method can 100% predict a building’s actual operational energy use, the TM54 methodology seeks to provide the most accurate estimate possible. It is recommended that TM54 is treated as a dynamic report and calculation that adapts as the design stage moves through to the build stage.
Occupant density beyond compliance assumptions can affect energy use but can be difficult to estimate or verify
Operating hours beyond those assumed in compliance consumption, including intermittent occupancy are not required to be considered for compliance Special functions are specialists activities that can cause a major increase in energy consumption such as lifts, swimming pools, medical equipment etc. Small power equipment including plug loads and other electrical equipment are excluded from the compliance stage tools
ICT including servers, telecoms, security etc. can have a major impact on energy use
Assumptions and simplication in the energy model (e.g. weather, infiltration etc.) can increase or reduce energy use
to learn how our sustainability can support your project with TM54, click here .
Part L calculations include heating, hot water, coiling, ventilation and fixed lighting at set occupancy and operating hours
annual site energy demand (MWh)
The energy profile of the building can be calculated based on heating and cooling profiles against local weather data and dynamic building heat loss models. On-site renewable generation should also be considered where possible.
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the goal of TM54 The goal of TM54 is to provide a more comprehensive operational energy analysis than Part L, which only accounts for regulated energy.TM54 goes further by including unregulated loads such as external lighting, server rooms, catering equipment, and other specialised electrical systems, capturing as much additional energy as possible. The energy usage from as many loads in the design should be considered, and these should match occupancy and how the building will be used. Accurately evaluating a building’s operational energy use beyond the standard Part L calculation is an important step in the design process. It enables clients to better understand future energy costs, identify major energy demands early on, and highlight opportunities for efficiency improvements while changes can still be easily integrated into the design.
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Heating Hot water
Lifts Catering Small Power ICT equipment Est PV offset
Internal lighting External lighting Fans and pumps Cooling
sustainability@ingletonwood.co.uk www.ingletonwood.co.uk
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