Flores, Joaquim2017-08-022017-08-022016-10Flores, Joaquim. The investigation of energy efficiency in Oporto World Heritage Site traditional buildings, In EECHB - Energy Efficiency and Comfort of Historic Buildings. Second International Conference Proceedings, Bruxelas, 2016.http://hdl.handle.net/10400.26/18721Oporto traditional buildings are the major contributors for shaping the World Heritage Site significance. Despite this, and as it occurs in most of the European historic cities, these are not individually listed and their adaptation to comply with the current energy efficiency requirements may cause negative impacts on their authenticity and integrity. This paper aims to identify which energy efficiency improvement measures can be applied without damaging their heritage value. Fieldwork and simulation data of ten case studies were used. Onsite results revealed that its energy consumption was below the European average. The households expressed that their home comfort sensation was overall positive. Simulations showed that the introduction of insulation and solar thermal panels would be ineffective in terms of energy, cost and comfort. This study reinforces the idea that traditional buildings perform better than expected and can be retrofitted and updated at a low-cost and with passive solutions.engOporto traditional buildingsEnergy efficiencyAssessment and simulationFieldworkconference object2017-07-28