Display® vs. Portuguese public buildings certification scheme

Indicator/ThematicDisplay Portuguese system MethodologyOperational rating Total energy consumption over 1 year Energy efficiency indicator – (includes energy bills for existing buildings) Surface calculatedGross internal floor areaGross Internal floor area Validity1 year Buildings where the “Regulation for Buildings’ Thermal Behaviour Characteristics” applies: - 10 years; Buildings where the “Regulation for Buildings’ Air conditioning Energy Systems” applies: - up until new Energy Audit or Internal Air Quality Audit, according to building type: 2, 3 or 6 years. Similarities and differences methodology/administration 1

Indicator/ThematicDisplay Portuguese system ObligationVoluntary, all public buildings Mandatory for buildings more than 1000 m² Into forceSince Independent Certifier required No, Auto-labellingYes, Qualified experts Climate correctionYes, local correctionYes Similarities and differences methodology/administration 2

Similarities and differences benchmarks/energy Classification systemDisplayPortuguese system Building types1131 (for asset rating) ClassesA-GAlso A-G, but A is a A to A+ and B is B- to B (9) Benchmark scaleLinear INDICATOR  Energy  Energy Primary E. Conversion factor SourceÖko-Institut (DE) DGGE (National Energy Directorate) Natural gas1,17 1,00 Electricity3,35 3,37 RESDepends on source Wood : 1,04 - 1,13 PV : 1,6 1,00

Indicator/thematicDisplay Portuguese system - CO 2 emissionsyesno Conversion factor Natural gas0,253- Electricity0,108- RES0,021 – 0, Wateryesno - CostsNo, but can be indicated in the Towards class A section No (except for extra energy efficiency measures – CHP, PV, other renewable electricity generation) Recommendations for improvement of building performance yes Technical solutions Simple actions on communication poster Yes Technical solutions with expected payback time and achievable rating Similarities and differences CO 2 /others