The hENS have developed for each glass type, e.g. basic soda lime silicate, coated, toughened, laminated, insulating glass units, etc. Multiple functions will be covered by the intended use of the product and its declared values.
The organisation placing the product on the market is required to show, through appropriate reference to the relevant hENs and declaration of essential product characteristics, that the product is suitable for its declared purpose.
E.g.1: Pilkington Pyrostop® containing a Solar Control glass where the intended use is 'fire resistance'.
In this case the relevant hEN is EN14449 (laminated glass) and fire resistance and solar performance characteristics will be stated under the CE declaration.
E.g. 2: An Insulating Glass Unit (IGU) incorporating the same Pilkington Pyrostop® product and carrying a similar intended use of 'fire resistance' must comply with hEN 1279-5 (IGUs) and fire and solar performance characteristics will again be stated in the CE declaration.
Note: Any product with claims for fire, explosion or bullet resistance intended uses must comply with System of Attestation 1 requirements.
The date of applicability of the hEN for IGUs and laminated glass has yet to be confirmed.