ANNEX II Requirements for windscreen defrosting and demisting systems

1. SPECIFIC REQUIREMENTS

1.1. Windscreen defrosting

1.1.1. Every vehicle shall be equipped with a system for removing frost and ice from the exterior glazed surface of the windscreen. The windscreen defrosting system shall be effective enough to ensure adequate visibility through the windscreen in cold weather.

1.1.2. The efficiency of the system shall be verified by determining the defrosted area of the windscreen periodically after starting, the vehicle having been kept in a cold chamber for a certain amount of time.

1.1.3. The requirements of paragraphs 1.1.1 and 1.1.2 shall be checked using the method set out in paragraph 2.1 of this Annex.

1.1.4. The following requirements shall be satisfied:

1.1.4.1. 20 minutes after the start of the test period, vision area A, as determined in accordance with Appendix 3 to Annex II, shall be 80 % defrosted;

1.1.4.2. 25 minutes after the start of the test period, the defrosted area of the windscreen on the passenger side shall be comparable to that specified in paragraph 1.1.4.1 for the driver’s side;

1.1.4.3. 40 minutes after the start of the test period, vision area B, as determined in accordance with Appendix 3 to Annex II, shall be 95 % defrosted.

1.2. Windscreen demisting

1.2.1. Every vehicle shall be equipped with a system for removing mist from the interior glazed surface of the windscreen.

1.2.2. The demisting system shall be effective enough to restore visibility through the windscreen in case it is fogged up with mist. Its efficiency shall be verified by the procedure described in paragraph 2.2 of this Annex.

1.2.3. The following requirements shall be satisfied:

1.2.3.1. Vision area A, as determined in accordance with Appendix 3 to Annex II, shall be 90 % demisted in 10 minutes;

1.2.3.2. Vision area B, as determined in accordance with Appendix 3 to Annex II, shall be 80 % demisted in 10 minutes.