Case Study to EN ISO 52010-1 – Climatic Data

This document presents the case study on f EN ISO 52010-1:2017, “Energy performance of buildings — External climatic conditions — Part 1: Conversion of climatic data for energy calculations”.

It also shows how the output can be directly used as input for EN ISO 52016-1 Energy performance of buildings — Energy needs for heating and cooling, internal temperatures and sensible and latent heat loads — Part 1: Calculation procedures (ISO 52016-1:2017).

EN ISO 52016-1 contains a choice between a monthly or hourly calculation interval. An hourly calculation interval is strongly preferred, as it is much more straightforward and transparent, providing a richer output: e.g. includes a score on thermal comfort.. Consequently, in this document also attention is paid to demonstrate how publicly available hourly datasets for all locations in Europe (and beyond), made available by the EC Joint Research Centre can be easily generated, converted and used.

Some of the work has been applied in the frame of webinars from the EPB Center, recordings of which are available under

The case study on this EPB standard concentrated on the demonstration of the calculation procedures applied to different sources of data:

  • The Test Reference Years according to NEN 5060:2018 in The Netherlands.
  • The reference climate for the IEA / ANSI BESTEST cases (Dry Cold climate of Denver, Col., USA).
  • Three datasets generated by the JRC TMY climatic data generator.


The main objective was to show that the module correctly handles the hourly input data for a full year and to show that the conversion of hourly solar irradiance on a horizontal plane to the solar irradiance of a plane at any arbitrary orientation and tilt angle works correctly and easily.

The calculations also demonstrate that the hourly output from EN ISO 52010-1 can be used (read in) directly as input for other EPB standards, in particular EN ISO 52016-1 (including hourly solar position, distinction between direct and diffuse irradiance (for shading by obstacles and for control of blinds).

The calculations with the datasets generated by the JRC TMY climatic data generator also demonstrate that the working of the conversion tool that has been made to convert the output from the JRC generator into input for EN ISO 52010-1.


More details on the calculation methodology and the impact it has on various building types, either residential or corporate, can be found in the full document, which can be accessed at the link below:

Report Case Study to EN ISO 52010-1 – Climatic Data