Description

The method given in this Standard provides data on frames that can be used in calculations of the overall thermal performance of windows and doors according to EN ISO 10077-1, Thermal performance of windows, doors and shutters – Calculation of thermal transmittance – Part 1: Simplified method (ISO 10077-1).

This Standard specifies a method, based on EN ISO 8990 and EN ISO 12567-1, to measure the thermal transmittance of frame and sash components of windows and doors, including mullions and transoms. The thermal bridging effect of window or door components (handles, hinges, closing devices, etc.) is included.

The test procedure is designed to take into account the whole developed area of the frame or sash surface, but  excludes the influence of the thermal bridge introduced through the spacer in sealed glazing units. Edge effects occurring outside of the perimeter of the specimen are excluded. Furthermore, energy transfer due to solar radiation is not taken into account, and air leakage is excluded. The measurements are performed under defined conditions to facilitate the comparison of measured values.