Public Sector Decarbonisation Guidance: BMS intervention estimator - Net Zero Go
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Public Sector Decarbonisation Guidance: BMS intervention estimator

This estimator is designed to provide an estimation of the costs and energy efficiency benefits of upgrading or installing a new building management system (BMS) on a campus-style site or at an organisational portfolio level.

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Provided by: Energy Systems Catapult

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Part of: Public sector decarbonisation guidance (PSDG)

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Building decarbonisation and retrofit Non-domestic energy efficiency

This estimator is designed to provide an estimation of the costs and energy efficiency benefits of upgrading or installing a new building management system (BMS) on a campus-style site or at an organisational portfolio level. Using this estimator also provides a repository of site information to be assembled in a consistent format.

This guidance is produced as part of the development of a consistent approach to assessing decarbonisation for scaled delivery.

This tool can be used standalone or as part of the Public Sector Decarbonisation Guidance feasibility and design process to assess the impact of re-commissioning or installing a new BMS on a given site's energy usage. It provides an estimation of the financial cost as well as the energy and cost savings to recommission/upgrade a site's BMS. Unit costs used in this estimator have been collated from SPON'S 2020 (SPON'S is an industry-standard approach to calculate the cost of projects by using UK-specific price data). These have been adjusted and compound inflation has been added to represent expected 2023 pricing. To do this, two years of CPI have been applied (2.5% for 2021 and 7.9% for 2022) – Source: ONS Inflation and Price Indices.

The benefits from fitting or upgrading a BMS will be dependent on the condition of the current system. A site-by-site assessment should be made as to whether these savings should apply to both electricity and heat. In general, large savings in electricity demand should not be expected for sites with predominantly natural ventilation, but it might be achievable for sites with large air-handling and air-conditioning systems. Where annual savings cannot be applied to both electric and heat consumption on site (e.g., a site is mostly naturally ventilated but the heating controls need upgrading), then demand should be split and savings applied to each accordingly.

ESC is making this report available under the following conditions. This is intended to make the Information contained in this report available on a similar basis as under the Open Government Licence, but it is not Crown Copyright: it is owned by ESC. Under such licence, ESC is able to make the Information available under the terms of this licence. You are encouraged to Use and re-Use the Information that is available under this ESC licence freely and flexibly, with only a few conditions. Using information under this ESC licence Use by You of the Information indicates your acceptance of the terms and conditions below. ESC grants You a licence to Use the Information subject to the conditions below. You are free to:

  • copy, publish, distribute and transmit the Information
  • adapt the Information
  • exploit the Information commercially and non-commercially, for example, by combining it with other information, or by including it in your own product or application.

You must, where You do any of the above:

  • acknowledge the source of the Information by including the following acknowledgement: “Information taken from Business models and complementary funding mechanisms to support heat pump deployment, by Energy Systems Catapult”
  • provide a copy of or a link to this licence
  • state that the Information contains copyright information licensed under this ESC Licence.
  • acquire and maintain all necessary licences from any third party needed to Use the Information.

These are important conditions of this licence and if You fail to comply with them the rights granted to You under this licence, or any similar licence granted by ESC, will end automatically.

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