Just to give more context, we have 2 fire ratings for our Hyg-ie-clad: C S3 D0 and B S3 D0.
Per his explanation:
All products are now under an EU standard, the top being A, next B, next C, next D next E etc.
The next code you see is S and a number so our product is S3 this relates to ‘smoke’ and the level of smoke that is emitted in a fire - the lower the number the better.
Under the European classification system for reaction to fire as defined in the standard EN13501 part 1, building products are tested for reaction to fire and divided into seven Euroclasses:
- A1 and A2
- B, C, D, E
- F for materials for which performance has not yet been determined or failing Euroclass E criteria
In a summary,
There are 7 reactions to fire classification levels available.
This part determines how much a material contributes to the spread of flame:
- A1, A2: Non-Combustible Materials
- B, C, D: Material very limited to medium contribution to fire.
- E, F: High contribution to fire.
- S1: a little or no smoke
- S2: quite a lot
- S3: substantial smoke
- D0: none
- D1: some
- D2: quite a lot
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