| Number of credits available | minimum standards |
|---|---|
Building type dependent | Yes |
To recognise and encourage the installation of energy sub-metering that facilitates the monitoring of operational energy consumption.
Please note:
The following is required to demonstrate compliance:
| 1 | Energy metering systems are installed that enable at least 90% of the estimated annual energy consumption of each fuel to be assigned to the various end-use categories of energy-consuming systems (see Methodology ). |
| 2 | The energy-consuming systems in buildings with a gross internal area greater than 1,000m² are metered using an appropriate energy monitoring and management system. |
| 3 | The systems in smaller buildings are metered either with an energy monitoring and management system or with separate accessible energy sub-meters with pulsed or other open protocol communication outputs, to enable future connection to an energy monitoring and management system (see Relevant definitions ). |
| 4 | The end energy-consuming uses are identifiable to the building users, for example through labelling or data outputs. |
| 5.a | In most circumstances, sub-metering should be per floor, or per floor plate where there are multiple service risers, cores, or floor plates. |
| 5.b | It is possible to sub-meter per entire core or service riser, where the number of rooms served by the riser is less than the number of rooms on a typical floor (served by all risers). |
| 5.c | In the instance of a number of service risers that each serve a large number of rooms on each floor in high-rise building; sub-metering by ‘floor plate’ which would mean sub-metering each of the risers at each floor is preferable. |
None.
| Ref | Terms | Description |
|---|---|---|
| Shell and core (non-residential and residential institutions only) | ||
CN1 | Applicable assessment criteria | Sub-metering of major energy-consuming systems, criteria 1 to 4 Shell only: These criteria are not applicable. Shell and core: All criteria relevant to the building type and function apply. Sub-metering of high energy load and tenancy areas, criterion 5 Shell only: This criterion is not applicable. Shell and core: All criteria relevant to the building type and function apply, subject to the following: Meters must be installed on the energy supply to each separate tenanted unit or floor plate within the assessed development. Refer to Appendix D – Shell and core project assessments for a more detailed description of the shell and core assessment options. |
| Residential - Partially fitted and fully fitted | ||
CN2 | Applicable assessment criteria - Single and multiple dwellings | Both options: This issues does not apply to residential dwellings. Refer to Appendix E – Applicability of BREEAM New Construction to single and multiple dwellings, partially and fully fitted for a more detailed description of residential assessment options. |
| General | ||
CN3 | Extensions to existing buildings | Where an existing building is being extended and it has existing building services plant and systems that will be common to both the new extension and existing building, the criteria only apply to the extension. In this case, energy services supplying energy-consuming systems from the existing building shall, as a minimum, be metered at the entry points to the extension, e.g. hot water, chilled water, gas and electricity. However, the best practice approach would usually be to ensure that the energy metering covers the entire building. |
CN3.1 | Modular boiler systems. See criterion 1 . | Modular boiler systems can be monitored as a whole. See Relevant definitions |
CN3.2 | Lighting and small power. See criterion 5 . | Due to traditional distribution methods, it can be difficult to separate lighting and small power cost effectively. It is acceptable, within a single floor, for lighting and small power to be combined for metering purposes, provided that sub-metering is provided for each floor plate. |
CN3.3 | Small function areas or departments. See criterion 5 . | For a building consisting of a number of small function areas or departments, sub-metering the heating, hot water and combined electricity energy uses is sufficient to achieve this credit. Individual electricity energy uses within each unit do not need to be sub-metered. For the purpose of this BREEAM issue, a small function area or department is defined as less than 250m². |
CN3.4 | Heating and hot water. See criterion 5 . | Space heating and domestic hot water may be combined with a single heat or gas meter per tenanted area or function area or department, where it is impractical to sub-meter these items separately. |
CN3.5 | Significant majority. See criterion 5 . | A significant majority of the energy supply to the tenanted areas or function areas or departments covers most of the energy uses, but does not have to include very small ones. As a guide, energy uses that cumulatively make up less than 10% of the energy supply for that area may be excluded. |
| Building type specific | ||
CN4 | Buildings situated on campus developments. See criterion 5 . | The systems for buildings situated on campus developments must be monitored using either an appropriate energy monitoring and management system or another automated control system, e.g. outstations linked to a central computer, for monitoring energy consumption. The criteria only apply to the assessed building. Where energy services are supplied from an existing building on the campus, they shall be metered at the entry points to the assessed building, e.g. hot water, chilled water, gas and electricity. Provision of a pulsed or other open protocol communication output is not sufficient to award the credit for these building types. |
CN4.1 | Small tenanted office, industrial or retail units. See criterion 5 . | For a development consisting of a number of small tenanted units, a single meter per unit for electricity and another for heating is sufficient to achieve this credit. Individual areas within each unit do not need to be sub-metered. For the purpose of this BREEAM issue, a small unit is defined as less than 250m². |
CN4.2 | Large office, industrial or retail units. See criterion 5 . | For a development consisting of one or more larger units (i.e. greater than 250m²), sufficient sub-metering to allow for monitoring of the relevant function areas or departments within the unit must be specified, in addition to metering of the unit as a whole. |
CN4.3 | Single occupant buildings: relevant function areas or departments. See criterion 5 . | The lists below summarise the commonly found functions by building types. These lists are not exhaustive and where other areas or departments exist, these should also be separately metered. |
CN4.4 | Office buildings |
|
CN4.5 | Retail buildings |
|
CN4.6 | Industrial units |
|
CN4.7 | Education buildings |
Individual sub-metering of standard classrooms or seminar rooms is not required. |
CN4.8 | Hotel Buildings | In assessment criterion 5 , relevant areas include (where present): 1. Office areas 2. Catering (kitchens or restaurant) 3. Conference suites 4. Swimming pool or leisure facilities 5. Hotel bedrooms metered per floor, core, floor plate, in a strategy that would provide benefit to facility management. For hotel type, it is acceptable, within a single floor, for the electric heating system to be combined with lighting and small power for metering purposes, provided that sub-metering is provided for each floor, core or floor plate. Benefit to facility management is measured by carrying out a comparison of similar building areas that would make it possible to identity any unusual or excessive energy consumption. |
Detailed guidance on how to develop an appropriate metering strategy for the energy criteria of a building is available in General Information Leaflet 65: Metering energy use in new non-domestic buildings and CIBSE TM39 Building energy metering1TM39 Building energy metering. CIBSE. 2009..
Where the total consumption of any single end-use category (or a combination of end-use categories added together) is estimated to account for less than 10% of the annual energy consumption for a given fuel type, it is not necessary for this end-use to be sub-metered. In this instance, the design team should demonstrate that the respective end-uses are expected to account for less than 10% of the annual energy consumption for the fuel type. Where a given end-use will clearly account for less than 10% of the total annual energy consumption for the fuel type in question, a simple hand calculation or use of benchmark data to demonstrate this is acceptable.
Where it is unclear whether an end-use would account for 10% of the annual energy consumption for a given fuel type or not, more detailed calculations should be provided. The total annual energy consumption should be estimated using a method that estimates actual energy consumption. The energy consumption for each end-use may be estimated by using methods described in CIBSE TM54: Evaluating operational energy performance of buildings at the design stage2TM54 Evaluating operational energy performance of buildings at the design stage. CIBSE. 2013., using actual operational inputs. The weather data used should be the average current weather data for the local area from a credible and verifiable source (e.g. a regional, national or international meteorological organisation, data source or equivalent). The data on water consumption from the Wat 01 Water consumption issue may be used as inputs for evaluating the energy use of domestic hot water.
| Criteria | Interim design stage | Final post-construction stage |
|---|---|---|
| All | Relevant section or clauses of the building specification or contract. Design drawings. | BREEAM Assessor’s site inspection report and photographic evidence. |
None.
BREEAM International New Construction 2016
Reference: SD233 – Issue: 2.0
Date: 03/07/2017
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