ISO DIS 3468

Description / Abstract: This International Standard specifies the test method for passenger car (term 3.1.1 in ISO 3833:1977) windscreen defrosting and demisting systems, when these are fitted.

This International Standard does not specify reference areas or levels of performance.

The test condition of -18°C ± 3°C specified for defrosting systems will meet the majority of cold climatic requirements.

The tests for demisting systems are conducted at a temperature of -3°C ± 1°C, since this is the practical minimum temperature at which mist, as defined in 3.7, can normally occur.