This standard lays down the principles for the design of the apparatus and minimum requirement that shall be met for determination of the laboratory steady-state thermal transmission properties of building components and similar components for industrial use. It does not, however, specify a particular design since requirements vary, particularly in terms of size, and also to a lesser extent in terms of operating conditions.
Number of pages: 36
Date of approval: 1997-03-19
EN ISO 8990:1996 IDTISO 8990:1994 IDT