Measurement of thermal emittance
Thermal emittance is defined as the ratio between the thermal emission of a surface and the maximum emission theoretically possible at the same temperature. It ranges from 0 to 1. A surface with high thermal emittance can dissipate easily heat towards the ambient towards which it is exposed. On the contrary, a low thermal emittance can reduce heat transfer between a surface and its surrounding environment. The control of thermal emittance can allow to reduce the summer heat gain of the opaque elements of buildings, or to reduce thermal loss during winter.
EELab makes measurement of thermal emittance in compliance with:
- ASTM C 1371, using a D&S emissometer. Test is accredited ISO 17025.
- UNI EN 15976, using a TIR emissometer. Test is accredited ISO 17025.