Crawley Library Building

• A detailed assessment of annual energy consumption and generation was undertaken using CIBSE TM22 procedures. Actual energy performance was compared to benchmarks and other buildings.
• Sub-metering arrangements were be calibrated, and energy demand profiles analysed using BMS data.
• Long-term monitoring was undertaken of temperatures, humidity and CO2 levels to investigate the effect of ‘thermal mass’ in moderating temperatures.
• To determine technical performance, spot checks and measurements took place in different seasons, using thermography, true power meters and luminance meters. Walkthrough surveys identified any wastage of energy.
• Feedback from staff and visitors using BUS questionnaires ascertained whether needs were met in terms of performance, usability of controls for ventilation and lighting. Structured interviews with management investigated reliability, maintenance and maintainability.

The study of Crawley Library provides insights into the issues that emerge and lessons to be learned in relation to design, commissioning, handover and management of a low carbon public building.

Initial findings of the study reveal insufficient handover training and documentation, frequent change in FM staff, unintended space usage and usability issues of controls and windows. Constant monitoring and feedback is crucial for fine-tuning the building’s operation and achievement of its environmental and service delivery targets.

It is crucial that this approach is absorbed and carried over after the end of the study to ensure future fine tuning and trouble shooting.