DIN EN 1946-1:1999-04

Thermal performance of building products and components - Specific criteria for the assessment of laboratories measuring heat transfer properties - Part 1: Common criteria; German version EN 1946-1:1999

Building products and components - Supplementary criteria for the assessment of instrument accuracy and personal competence in laboratories performing heat transfer property measurements - Part 1: Common guidelines and general criteria; German version prEN 1946-1:1995