BGP index: an approach to the certification of building global performance

In order to improve life quality into buildings, the present paper proposes a certification model for indoor total comfort.The first part of the paper concerns energy certification of buildings, with attention to energy efficiency, renewable sources, heating and air-conditioning. In the second part of the paper certificate concept is extended to factors which contribute to ideal requirements into buildings: acoustics and lighting, use of water, safety and technology are studied according to standards. Finally, an overall building quality certificate is proposed, based on indexes concerning specific performances. Every index is assigned a weight to characterize different contributions to Building Global Performance (BGP) index, which expresses total indoor quality. Weights are estimated according to objective criteria. Measurements and provisional models allow to analyse and classify a private flat as a case study. A reliable approach is shown to improve indoor environments and to support comfortable and sustainable buildings.