Ventiflex Ventilation Calculator
Easy to use for your project
The calculator also gives recommended fan size and expected air pressure for supplying the necessary fresh air to the face. The calculator is based on SIA recommendations and current European standards for tunnel ventialtion. That i swhy the return air velocity is automatically set to 0.5 m/s.
Three key parameters
You only need to specify three key parameters for the calculator to do the sums:
- Tunnel cross-section
- Tunnel length
- SIA class
With the quality offered by Ventiflex, we recommend using class S for TBM tunnels and class A for conventional D&B tunnels.
The Ventiflex Ventilation Calculator is a guide. In most cases it will therefore be necessary to carry out a more detailed calculation to check that the ventilation requirement has been dimensioned correctly.
You only need to specify three key parameters for the calulator: