All about glass > Fire resistance : E, EW & EI

The level of resistance to fire of a glazing is stated by a class & a duration expressed in minutes:

Class E	Class EW	Class EI
Integrity= ability of the element to prevent the passage of flammes	Integrity + low heat radiation,   limit  the level of heat transfert	Integrity + low heat radiation + Insulation, block the heat transfert

The integrity E and Insulation I performances of fire rated glass are measured according to European Standards for complete glazed systems