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Employee
Mar 25, 2025 7:56 PM UTC

Calculation for ventilation duct.

For return ducts, air volume sum is going corectly for few air terminals and then suddenly start to subtract values.(see picture below) Do you have any solution for that issue?

afbeelding

    6 replies

    Known Participant
    Mar 25, 2025 9:18 PM UTC

    Bonjour,

    Vérifiez les classifications de système de vos bouches et de votre réseau. Il faut que l'ensemble soit dans la même classification.

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    Employee
    Mar 25, 2025 9:18 PM UTC

    System classification and system type are the same for every part of instalation

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    Employee
    Mar 25, 2025 9:18 PM UTC

    Please check if the air terminals have proper flow directions.

    See the linked article.

    https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Return-Air-Flow-rate-calculation-incorrect-in-Revit.html

     

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    Employee
    Mar 25, 2025 9:18 PM UTC

    Also please make sure that there are no open connections (except of 1) in your network.

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    Employee
    Mar 25, 2025 9:18 PM UTC

    @Kamil Pluciennik​ Thank you for tips ! Indeed flow direction for air terminals has been set not correct. Now everyting is working as it should.

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    Employee
    Mar 25, 2025 9:18 PM UTC

    Great to hear you found a solution!

    Miłego dnia :) / have a nice day.

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