The UK governmental strategy for fulfilling Article 3 of the Directive on Energy Performance of Buildings was implemented through the introduction of the Building and Approved Inspectors (Amendment) Regulations 2006 (England and Wales). These regulations defined the ‘National Calculation Methodology’ as the unified route for demonstrating compliance with energy performance criteria and required the use of accredited building energy performance prediction tools to implement associated calculations. A mixed-method study was used to synthesize a comprehensive assessment of the viability of adopting this approach for the new non-domestic sector. Key parameters of success measuring the adaptive capability of the UK construction industry, applicability of the methodology and suitability of accredited tools were developed as the framework for evaluation. The main findings outline shortcomings in the adaptation strategy adopted by industry, inconsistent implementation/enforcement approaches and fundamental tool limitations. The research concludes that although a number of positive aspects can be associated with the use of this approach for compliance demonstration, considerable efforts are required to extend its usefulness as a credible legislative support tool. Key recommendations are provided in the fields of research and development, policy formulation, and future industry practice. La stratégie gouvernementale britannique pour s'acquitter des obligations prévues à l'Article 3 de la Directive sur la performance énergétique des bâtiments a été mise en oeuvre grâce à l'introduction de la Réglementation 2006 (Modifiée) relative au Bâtiment et aux Inspecteurs Agréés (Angleterre et Pays de Galles). Cette réglementation a défini la « Méthodologie Nationale de Calcul » comme étant la voie unifiée pour démontrer la conformité aux critères de performance énergétique et a fait obligation d'utiliser des outils agréés de prévision des performances énergétiques des bâtiments pour mettre en oeuvre les calculs associés. Il a été utilisé une étude à méthodologie mixte pour synthétiser une évaluation globale de la viabilité de l'adoption de cette approche pour le nouveau secteur non domestique. Il a été développé comme cadre d'évaluation des paramètres clés de réussite mesurant la capacité d'adaptation de l'industrie britannique du bâtiment, l'applicabilité de la méthodologie et la pertinence des outils agréés. Les principaux résultats obtenus exposent les défauts de la stratégie d'adaptation adoptée par l'industrie, les incohérences dans les approches adoptées pour la mise en oeuvre/en vigueur et les limites fondamentales des outils. Ce travail de recherche conclue que, bien qu'un certain nombre d'aspects positifs puisse être associé à l'utilisation de cette approche pour démontrer la conformité, des efforts considérables sont nécessaires pour étendre son utilité en tant qu'outil crédible de soutien législatif. Il est fourni des recommandations clés dans les domaines de la recherche et développement, de la formulation des politiques et des pratiques futures de l'industrie. Mots clés: performances des bâtiments, réglementation du bâtiment, évaluation de la conformité, prévision énergétique, politique européenne, réglementation basée sur les performances
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