CEN/TC 89/WG 13 - In-situ thermal performance of materials, elements and structures

This document specifies a test method for the in situ measurement of the thermal performance of buildings, both newly built and existing.
This document specifies the data to be collected during and after the test.
NOTE   The analysis of the data and the reporting format for the analysis are referred to in prEN 17887-2:2022 Thermal performance of buildings - In situ testing of completed buildings - Part 2: Steady-state data analysis for aggregate heat loss test.
This document is applicable to domestic scale detached buildings and attached domestic scale buildings, such as semi-detached houses, terraced houses and apartments.

This document specifies the steady-state data analysis methods to evaluate the data from ‘the aggregate heat loss test method’. These analysis methods enable the actual in situ aggregate heat loss (building heat transfer coefficient) to be estimated.
NOTE   The aggregate heat loss method is specified in prEN 17888-1:2022, Thermal performance of buildings - In situ testing of building test structures - Part 1: Data collection for aggregate heat loss test.

This document specifies a test method for the in situ testing of the thermal performance of building structures especially built for the purpose of the test.
This document also specifies the apparatus to be used and the measurement procedures to collect the data and the reporting format for the apparatus including the building test structure and the test conditions.
NOTE   The analysis of the data and the reporting format for the analysis are referred to in prEN 17888-2.
This document does not apply to:
-   existing buildings;
-   building structures allowing direct solar gains through glazing surfaces;
-   the determination of the thermal performance of a specific building product, material, component or element.

This document specifies the steady-state data analysis methods to evaluate the data from ‘the aggregate heat loss test’. These analysis methods enable the actual in situ aggregate heat loss (building heat transfer coefficient) to be estimated.
NOTE   The aggregate heat loss method is specified in prEN 17887-1:2022 Thermal performance of buildings - In-situ testing of completed buildings - Part 1: Data collection for aggregate heat loss test.