Ventilation improvement testing

Ventilation improvement testing in the métro system

Aeraulic testing  may be performed on several mechanical ventilation stations. The tests involve measuring the air displacement rate during the application of various emergency ventilation scenarios.

Texte important

When and where will the next tests take place?

The next tests will occur during the night of October 10 to 11 and October 24 to 25 between the following stations: 

  • Jarry and Jean-Talon
  • Sauvé and Crémazie

Questions and answers

You might hear a low humming noise, if your home is located near one of the ventilation stations.

For the tests to obtain conclusive results, the métro must not be operating at the same time, as the movement of the trains would displace the air and distort the data.

 Mechanical ventilation stations serve three essential purposes:

  • Comfort ventilation: Regulates the ambient temperature for transit users by exchanging air between the métro system and outside.
  • Night-time ventilation: Supplies fresh air for night workers carrying out routine maintenance.
  • Emergency ventilation: In the event of an incident, allows for smoke control so that transit users can evacuate safely by the nearest métro station and emergency first responders can access the site with no obstructions.

For more information, call 514-STM-INFO

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