Division 3.3 Calculation on the limitation of the exhaust air

United Kingdom

1. 3.3.1Domestic range hoods with a maximum air flow in any of the available setting higher than 650 m3/h shall automatically revert to an air flow lower than or equal to 650 m3/h in a time tlimit. This is the time limit to extract a volume of air of 100 m3 by the domestic range hood operating with an airflow higher than 650 m3/h, before automatically switching to an airflow of 650 m3/h or lower. It is calculated, expressed in minutes and rounded to the nearest integer as:
2. 3.3.2For domestic range hoods with automatic functioning mode during the cooking period: