λdesign,mas thermal conductivity rated valueAUT

λ_design,mas thermal conductivity rated value_AUT

Austrian rated heat conductivity value. This value is to be used for thermal performance calculations (energy performance certificates, etc.).

Definition for masonry: The rated heat conductivity value of the masonry (including the material, brick geometry and joint proportion) is indicated with λ_design,mas and determined in terms of 50% fractile values.
Source: ÖNORM 8110-7

Proof: Test report of an accredited or notified testing body on the calculation of the thermal design value according to ÖNORM EN 1745, ÖNORM B 3200 and ÖNORM EN ISO 10456.

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