Delegates from the UK, USA and other countries gathered for the12th annual CIBSE ASHRAE Technical Symposium, which was held at the Dublin Institute of Technology, from 3 to 4 April.
The event focused on the problem of buildings failing to perform to their design intentions and presented new processes, technologies and best practice to tackle this issue. It also showed where international comparisons could provide lessons in how to improve building performance.

Andy Ford, past president of CIBSE, chaired a session on Evaluating the performance gap at which Esfandiar Burman of UCL looked at the lessons that could be learned in the UK from ASHRAE's building energy labelling programme 'building Energy Quotient (bEQ)'. Greater consistency in baselines defined for the 'As Designed' and 'In Operation' schemes, attention to key determinants of energy use based on building type, and an integrated approach to operational rating and indoor environmental quality are among the key contributions of bEQ that can help to improve building energy certification programmes.

Further lessons from the USA came from Daniel Wright of the Pratt Institute who outlined how New York could reduce its carbon footprint by 90% by 2050. He said: 'Deep energy efficiency retrofits can lower building energy use by more than 50% and with these retrofits, New York buildings can eliminate fuel use and operate on the electric energy now used.'

The discrepancy between design and operation of buildings was a recurring theme, as was the need for effective benchmarking to drive improved building performance. Bill Bordass, Usable Buildings Trust, used the example of schools to highlight the need for an integrated benchmarking system for non-domestic buildings. He said 'Energy benchmarks are too often poorly-matched to the characteristics of the buildings being benchmarked. Procedures that focus on CO2 emissions can also distance people from the physical realities of energy use by source and end use.'

In addition, Judit Kimpian of Aedas Architects presented an analysis of real energy data from CarbonBuzz, a database of actual building energy performance data.

Prizes were presented to the following speakers:

· Most effective delivery of material: Richard Rooley and Alex MacLaren - Teambuild: training for collaboration, human failures and success in a technical industry.

· Most significant contribution to the art and science of building services engineering: Benjamin Skelton - It's not easy being green: Walgreen's net-zero energy store.

The full programme of speakers and posters is at www.cibse.org/symposium2014 and supporting documentation is available from bit.ly/Dublin2014.

Next year's Symposium will be hosted by the Energy Institute at University College London and will take place from 16-17 April 2015.