About the Calculation Method “Workplace Directives (1984/2013)”
Explains the concept of determining the required air volumes for rooms in non-residential buildings based on the calculation method Workplace Guidelines.
In the air volume calculation for workplaces, two methods are used based on the default values of the Workplace Directive A4.1 (2013) and Workplace Directive A5 (1984). The calculation based on Workplace Guideline A4.1 is used for sanitary rooms and the calculation based on Workplace Guideline A5 is used for all other room types in workplaces. When determining the air volume, it is ensured that all loads (material, moisture and heat loads) are reliably dissipated.
In the Workplace Directive A5, the required outdoor air volume flows are determined based on the number of people and the physical intensity of the activity. You can also take into account additional air volumes required due to customes and visitors. You can also include other factors such as high heat loads or unpleasant odors in the room in the calculation. Furthermore, it is possible to reduce the total air volume flow rate by up to 50 percent when the outside temperatures are between 26 °C and 32 °C, and between 0 °C and -12 °C.
The Workplace Directive A4.1 ensures that the area-related volume flow rate required by the directive is complied with.