Humidity resistance
Ceiling producers must ensure that ceiling tiles have sufficient strength to support their own weight once installed, and potentially an additional point/linear/distributed load.
This is done by testing Flexural Tensile Strength according to EN 13964:2014 (Annex F for ceiling panels, and Annex J for Baffles) under determined conditions and classes according to Table 8, EN 13964:2014.
The performance of Ecophon ceiling panels can be found in their respective Declaration of Performance.
Table 8, EN 13964:2014
| Class | Conditions |
| A | Building components exposed to varying relative humidity up to 70 % and varying temperature up to 25 °C but without corrosive pollutants. |
| B | Building components exposed to varying relative humidity up to 90 % and varying temperature up to 30 °C but without corrosive pollutants. |
| C | Building components 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. |
| D | More severe than the above. |