ISO 25745-3:2015

Overview

ISO 25745-3:2015 - "Energy performance of lifts, escalators and moving walks - Part 3: Energy calculation and classification of escalators and moving walks" provides standardized, repeatable methods to estimate and classify the operational energy consumption of escalators and moving walks. The standard focuses on in-service, modernized, and new units during their operational life cycle (running and standby), covering inclined escalators and moving walks up to a rise of 8 m and horizontal moving walks up to 60 m (≈85% of installed units worldwide). Ancillary systems (e.g., HVAC, most lighting, alarms, power sockets) are excluded except for essential lighting: comb plate lighting, step gap lighting, and traffic lights.

Key technical topics and requirements

• Energy estimation methods
  • Two accepted approaches: calculation using default values (planning/estimation) and power measurement (site-specific).
  • Annex A supplies calculation methods and default tables for planners and engineers.
• Energy performance classification process
  • Normalize power consumption via a calculated reference power consumption (handrail, step band, control systems).
  • Measure or calculate the specified unit's power in standardized operating modes (no-load, nominal speed, standby, etc.).
  • Compute the energy performance ratio and reference operation mode performance ratio to assign classification.
  • Consideration of ancillary power where applicable (per standard rules).
• Reporting and documentation
  • Required data sets and formats are defined (see Annex A and Tables A.3/A.4), enabling consistent comparisons and reclassification after modernization.
• Accuracy guidance
  • Calculated estimates are based on average factors; deviations from measured values may occur. Differences greater than 20% warrant investigation.

Practical applications

• Energy benchmarking and retro-commissioning of escalators and moving walks.
• Supporting energy-efficient building design and environmental certification programs.
• Justifying modernization investments (e.g., drive upgrades, control changes) through standardized re-classification.
• Regulatory compliance and local jurisdictional energy performance assessments.

Who should use this standard

• Building developers and owners
• Facility managers and energy managers
• Elevator/escalator installers and maintenance contractors
• Architects, consultants, and specifiers
• Inspection authorities and third-party energy assessors

Related standards

• ISO 25745-1 - Energy measurement and verification
• ISO 25745-2 - Energy calculation and classification for lifts (elevators)

Keywords: ISO 25745-3, energy performance, escalators, moving walks, energy calculation, energy classification, operational energy, energy efficiency.