(all buildings)
| Number of credits available | Minimum standards |
|---|---|
| 3 | No |
Aim
To recognise and encourage the specification of energy efficient transport systems.
Assessment criteria
The following is required to demonstrate compliance:
One credit - Energy consumption
| 1 | Where lifts, escalators, or moving walkways (transport types) are specified: |
| 1.a | An analysis of the transport demand and usage patterns for the building has been carried out to determine the optimum number and size of lifts, escalators, or moving walkways. |
| 1.b | The energy consumption has been estimated in accordance with ISO 25745 Energy performance of lifts, escalators and moving walks, Part 2: Energy calculation and classification for lifts (elevators) or Part 3: Energy calculation and classification for escalators and moving walks, for one of the following: |
| 1.b.i | At least two types of system (for each transport type required); OR |
| 1.b.ii | An arrangement of systems (e.g. for lifts, hydraulic, traction, machine room-less lift (MRL)); OR |
| 1.b.iii | A system strategy which is 'fit for purpose'. |
| 1.c | The use of regenerative drives should be considered, subject to the requirements in CN6 |
| 1.d | The transport system with the lowest energy consumption is specified. |
Two credits - Energy efficient features
| 2 | Criterion 1 is achieved. |
Lifts
| 3 | For each lift, the following three energy efficient features are specified: |
| 3.a | The lifts operate in a standby condition during off-peak periods. For example, the power side of the lift controller and other operating equipment such as lift car lighting, user displays and ventilation fans switch off when the lift has been idle for a prescribed length of time. |
| 3.b | The lift car lighting and display lighting provides an average lamp efficacy (across all fittings in the car) of greater than 70 lamp lumens per circuit watt. |
| 3.c | The lift uses a drive controller capable of variable speed, variable-voltage, and variable-frequency (VVVF) control of the drive motor. |
| 4 | Where the use of regenerative drives is demonstrated to save energy, they are specified. |
Escalators or moving walkways
Each escalator or moving walkway complies with at least one of the following:
| 5 | It is fitted with a load sensing device that synchronises motor output to passenger demand through a variable speed drive. |
OR
| 6 | It is fitted with a passenger sensing device for automated operation (auto walk), so the escalator operates in standby mode when there is no passenger demand. |
Checklists and tables
None.
Compliance notes
| Ref |
Terms |
Description |
|---|---|---|
| Shell and core (non-residential and residential institutions only) | ||
|
CN1 |
Applicable assessment criteria |
Shell only: This issue is not applicable. Shell and core: All criteria relevant to the building type and function apply. 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: All criteria relevant to the building type and function apply. 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 |
Scope of this issue | The criteria relating to lifts apply to any lifting device with a rated speed greater than 0.15 m/s, inclusive of goods lifts, vehicle lifts, and passenger lifts. This means that lifts in single dwellings, or those installed in other low-rise buildings, specifically for the use of persons with impaired mobility are usually excluded from the assessment. |
|
CN4 |
Transport analysis - Disabled access and goods lifts | The transport analysis can be in the form of a written statement justifying the lift selection for the following conditions: where a single lift is provided in a low rise building for the purpose of providing disabled access only; or where a goods lift is selected based on the size of the goods it is intended to carry. |
|
CN4.1 |
Transport analysis – Carried out by lift manufacturer |
BREEAM recognises that lift manufacturers / suppliers are often engaged to provide such specialist advice. Where the assessor is satisfied that the analysis has been carried out correctly, the analysis can be submitted as compliant evidence. (KBCN0232) |
|
CN5 |
Building has no lifts, escalators, or moving walkways | This issue will be filtered out where a building contains no lifts, escalators or moving walkways with a rated speed greater than 0.15 m/s. Where only one of the transport systems is present, the two credits can be awarded where the one system is compliant with the relevant criteria. |
|
Lifts - Regenerative drives. |
A regenerative drive should only be considered where it produces an energy saving greater than the additional standby energy used to support the drives. Regenerative drives will typically be appropriate for lifts with high travel and high intensity use. However, where it can be demonstrated that this is not financially viable, accounting for payback over the service life of the installation, this option can be discounted. |
|
|
CN6.1 |
Lifts - Counterbalancing ratio fixed |
The requirement to analyse the counterbalancing ratio can be omitted if the project team can provide a statement confirming that it has been set by the manufacturer due to existing standards and to maximise efficiency. The remaining criteria must be met. (KBCN0327) |
|
CN6.2 |
Lifts - Extending a lift shaft |
Where the scope of works regarding a lift only includes extending the lift shaft to other floors, then assessment of this lift is not appropriate. Where changes are made to the lift system, then assessment is required. Where changes to lift systems are made, these lifts need to be included in the assessment to encourage specification of energy efficient transport systems. (KBCN0802) |
|
CN6.3 |
Lifts - Evacuation lifts |
Evacuation lifts, which will be used during an emergency only, can be excluded from the relevant BREEAM criteria. However, if these lifts are used during the normal operation of the building, then they still need to be assessed. (KBCN0437) |
|
CN6.4 |
Lifts - New build extension using existing lifts |
Where the assessment is only of a new build extension (and not the existing building), lifts present in the existing building fall outside the scope of Ene 06 and do not need to be assessed. The applies only when the lifts are not being renewed or undergoing a major refurbishment. (KBCN0444) |
Methodology
None.
Evidence
| Criteria | Interim design stage | Final post-construction stage |
|---|---|---|
| 1 | Professional report or study of transport analysis or calculations. | As design stage. |
| 3 – 6 |
The relevant section or clauses of the building specification or contract AND Manufacturer's product details OR A formal letter of commitment from the system's manufacturer or supplier AND Where the regenerative drive unit is to be excluded as an energy efficient feature, written confirmation from the electricity utility supplier and the design team giving reasons for its exclusion. |
Manufacturer's product details. BREEAM Assessor’s site inspection report and photographic evidence or as-built drawings. |
Additional information
Relevant definitions
- Idle condition
- A condition when a lift is stationary at a floor following a run before the standby mode is entered (ISO 25745-1: 2012).
- Machine room-less lift (MRL)
- All equipment is contained in the lift well, not in a separate machine room.
- Standby condition - lifts
- A condition when a lift is stationary at a floor and may have reduced the power consumption to a lower level set for that particular lift (from ISO 25745-1: 2012). The period between when a lift was last used and when a standby condition is entered is defined in ISO 25745-1 as 5 minutes.
- Standby condition - escalators and moving walkways
- A condition when the escalator or moving walkway is stationary and powered on, and it can be started by authorised personnel.
Other information
ISO 25745 - Energy performance of lifts, escalators and moving walks
ISO 25745 consists of three parts, under the general title "Energy performance of lifts, escalators and moving walks":
- Part 1: Energy measurement and verification
- Part 2: Energy calculation and classification for lifts (elevators)
- Part 3: Energy calculation and classification for escalators and moving walks.
In Part 1, it has been estimated that approximately 5% of a building's total energy consumption can be attributed to the operation of lifts and a large proportion of this can be attributed to standby mode in many situations. ISO 25745 Parts 2 and 3 have been prepared in response to the rapidly increasing need to ensure and support the efficient and effective use of energy, providing:
- A method to estimate energy consumption on a daily and an annual basis for lifts, escalators and moving walks
- A method for energy classification of new, existing or modernised lifts, escalators and moving walks
- Guidelines for reducing energy consumption that can be used to support building environmental and energy classification systems.