The UK non-domestic sector accounts for 2 million buildings and 19% of national CO 2 emissions, representing a significant opportunity for emission reductions. However, substantial improvement of the stock requires a greater understanding of current energy performance characteristics. This paper explores energy consumption in English schools, using data from the Display Energy Certificates (DECs) database. DECs are a key step in understanding the non-domestic stock, incorporating national-scale statistical data, covering bottom-up details of the individual buildings. Significant variations in emissions between primary and secondary schools and academies exist, primarily caused by large differences in electricity consumption. Considering pupil numbers is shown to accentuate the differences, revealing a 47% rise in CO 2 emissions per pupil from primary to secondary schools, and a further increase between secondary schools and academies. The extent to which building characteristics, including location, heating, ventilation and air-conditioning (HVAC) and size, influence performance has also been evaluated. Location, HVAC and school density are shown to correlate with variations in energy use. Finally, a comparison of current school performance against past data reveals considerable reductions in fossil-thermal energy consumption over the last decade. However, this has been offset by a significant increase in electricity consumption, resulting in rising typical emissions across the school types.Le secteur non domestique britannique représente 2 millions de bâ timents et 19% des émissions de CO 2 du pays, ce qui constitue une importante opportunité de réduction des émissions. Cependant, une amélioration substantielle du parc exige une plus grande compréhension des caractéristiques actuelles des performances énergétiques. Cet article examine la consommation d'énergie dans les écoles anglaises, en utilisant les données provenant de la base de données des Display Energy Certificates (DEC -Certificats de Performance Energétique à afficher). Les certificats DEC sont une étape clé pour mieux connaître le parc non domestique, intégrant des données statistiques à l'échelle nationale et couvrant en détail selon une approche ascendante les différents bâ timents. D'importantes variations des émissions entre les écoles primaires, les écoles secondaires et les académies existent, principalement dues à de grandes différences dans la consommation électrique. Il est démontré que la prise en compte du nombre d'élèves accentue les différences, révélant une hausse de 47% des émissions de CO 2 par élève entre les écoles primaires et secondaires, une hausse supplémentaire intervenant entre les écoles secondaires et les académies. A également été évalué le degré d'influence sur les performances des caractéristiques des bâ timents, au nombre desquelles l'emplacement, le chauffage, la ventilation mécanique et la climatisation (CVCA), ainsi que la taille. Il est démontré que l'emplacement, la CVCA et la densité des écoles sont en corrélation ...

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The influence of internal and external characteristics on energy use in the public sector office stock in England and Wales is explored using a database of 2600 Display Energy Certificates (DECs) combined with other sources of disaggregated office information. The DEC office benchmarks are shown to match the median fossil thermal and electrical consumptions well. Analyses of heating, ventilation and air-conditioning (HVAC), size, occupancy density, building age, location and rateable value are considered. While newer offices are shown to have lower typical fossil-thermal consumption than older offices, this is counterbalanced by higher electrical consumption, resulting in higher typical CO 2 emissions. This has implications for the UK's emissions reduction targets for 2050, indicating that while building regulations that focus on thermal performance have been successful, a focus on electrical consumption (both regulated and unregulated) is key. The results are also compared with existing benchmarks for all UK offices, splitting the sample into four generic types, and compared with a similar smaller study of private offices. This indicates that public offices typically used less energy than the general benchmarks had previously predicted, particularly for prestige offices.

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