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POLICY DISPLAY ENERGY CERTIFICATES


Many larger private buildings will have to


display energy certifi cates


AIR AND VENTILATION POLLUTION


Clients are prepared to accept the wider use of Display Energy Certifi cates, but will insist on improvements. Ewen Rose reports from a CIBSE seminar


T


he extended scope of Display Energy Certifi cates (DECs), announced as part of the 2010 ‘recast’ Energy Performance of


Buildings Directive (EPBD), has received a qualifi ed welcome from building clients. They like the concept, but insist that what they regard as serious fl aws in the current arrangements are ironed out. Under the EPBD, the size threshold for


public buildings that must display a DEC will be reduced from to 500 sq m from July 2013. Many larger private buildings will also have to display certifi cates. The new rules demand that each individual building over the size threshold has its own certifi cate. This could require a substantial increase in the number of energy meters deployed. The CIBSE Benchmarks Committee feels that this is not necessary. Clients who attended a CIBSE seminar


www.cibsejournal.com


on the topic: ‘All Hands on DEC’, did not appear daunted by the requirements of the recast, but they now expect something in return; namely, a better class of DEC. They questioned the ‘robustness’ of


the current system and called for more consistent results to make it easier for property professionals to compare buildings. They also set engineers the challenge of closing the gap between DECs and Energy Performance Certifi cates (EPCs) – that is, making buildings perform closer to their design intent. Most clients prefer an actual rating based


on energy use, rather than sustainability or carbon, because cost is the main driver for prospective tenants. The seminar heard that eventually tenants


will refuse to take on a building if it does not have a DEC rating of C or above. However, that day is still some way off because of the


April 2012 CIBSE Journal 47


DECs are driving the installation of meters so we are all getting a better handle on energy data


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