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The prevention of the snow entrance to the HVAC systems.

Author(s) : ASIKAINEN V., PASANEN P.

Summary

Entrance of snow into the HVAC systems is a common problem in arctic and subarctic climates and may cause moistening or wetting of filters and outdoor air chambers which promotes microbe growth. Blocking the filters also increases pressure drop or even damages the filters. The design features and velocity of air in the outdoor air intake play key role when the problems occurs. To eliminate the snow entrance into the HVAC systems the face velocity of the outdoor air shall be below 1 m/s at the intake louvre. The pressure caused by wind is one of the external conditions that influence the snow penetration through the intake louvre and some solutions for elimination of this problem are presented. If the snow, however, is entranced to the HVAC system good design and hygiene control of the intake section of the HVAC system is important which is discussed more detailed in this paper.

Details

  • Original title: The prevention of the snow entrance to the HVAC systems.
  • Record ID : 2008-2655
  • Languages: English
  • Source: Clima 2007. WellBeing Indoors. Proceedings of the 9th REHVA World Congress [CD-ROM + Abstract book].
  • Publication date: 2007/06/10

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