cen:proj:77641

Energy Performance of Buildings — Operational rating — Requirements for assessing Operational rating

Scope

This document provides a methodology for data acquisition and data processing, to obtain a measured energy performance assessment and an operational rating of a building. The measured energy performance may be used for the purpose of:

- rating and entire building and/or providing partial performance indicators;
- validating a calculated energy performance;
- confirming the improvement of the energy performance following the implementation of an energy conservation measure.

A non-exhaustive list of the open topics in the field includes:

1. Procedures to provide a measured energy performance assessment
2. The definition of a reference building or the reference values of the Operational Rating.
3. The definition of normalization procedures for the various parameters affecting the actual performance of a building, mainly the climatic-related parameters as well as the indoor environmental data (IEQ including indoor air quality, thermal comfort or lighting), level of service, domestic hot water use and the person occupancy.
4. The determination of the performance indicators which will be assessed with the Operational Rating
5. The properties which need to be measured to define the operational energy rating of a building (like the non-EPB energy use).
6. Procedures to compare the calculated and the measured energy performance rating and indicators.
7. The definition of the minimum classification requirements for the case of the operational rating (see EN ISO 52003-1).
8. The minimum requirements in relation to the equipment and the data acquisition, such as the time step, the accuracy and the postprocessing of the measurements.

The above issues are defined at this stage as the most significant challenges the EU member states should address in order to reach a common understanding in relation to the way the Operational Rating of buildings will be implemented.

To assess the outcome of energy monitoring devices in products (generators and emitters), reference will be made to relevant documents from other TCs, like CEN/TC 156 and CEN/TC 228. The results of regular inspections according to relevant standards will also be consider.

Related legislation

Legislation related to this standard