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.

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When and where will the next tests take place?

The next tests will occur during the night between the following stations:

  • De Castelnau and Jean-Talon·(From July 3 to 4, 2020)
  • Parc and De Castelnau (From June 19 to 20 and July 3 to 4, 2020)
  • Côte-des-Neiges and Université-de-Montréal (From June 19 to 20, 2020)
  • West of Snowdon station (From June 19 to 20, 2020)
  • Plamondon and Namur (From June 19 to 20, 2020)
  • Laurier and Mont-Royal (From July 3 to 4, from July 10 to 11 and from July 24 to 25, 2020)
  • Jarry and Jean-Talon (From July 3 to 4, 2020)
  • Crémazie and Sauvé (From July 3 to 4, 2020)
  • D'Iberville and Saint-Michel (From July 3 to 4, 2020)
  • Papineau and Frontenac (From July 10 to 11 and from July 24 to 25, 2020)
  • Préfontaine and Joliette (From July 10 to 11, 2020)
  • Pie-IX and Viau (From July 10 to 11, 2020)
  • Mont-Royal and Sherbrooke (From July 10 to 11 and from July 24 to 25, 2020)

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, 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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