Ventiflex Tunnel Ventilation Calculator

The Ventiflex Ventilation Calculator is a simple tool for calculating the recommended diameter of ventilation ducts for a tunnel project.

Ventiflex Ventilation Calculator

The Ventiflex Ventilation Calculator is a simple tool for calculating the recommended diameter of ventilation ducts for a tunnel project.

Ventiflex ventilation calculator for tunnels

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.

Guide

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.

Open the calculator HERE.

You only need to specify three key parameters for the calulator:

  • tunnel cross-section
  • length
  • SIA class