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Class A Building component exposed to varying relative humidity up to 70% and varying temperature up to 25°C but without corrosive pollutants
Class B Building component exposed to varying relative humidity up to 90% and varying temperature up to 30°C but without corrosive pollutants
Class C Building component exposed to varying relative humidity up to 95% and varying temperature up to 30°C and accompanied by a risk of condensation but without corrosive pollutants
Class D More severe than above
Armstrong has a wide range of ceilings products that perform to the different classes of exposure as showed above. To download the products performance table, please click here.
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