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    • Bokmerker
    • Rørhåndboka 2025 Pluss
    • Prenøk
    • Styring og regulering av tekniske anlegg i bygg.
    • VVS-TV
    • Ventøk
    • Varmenormen (2017)
    • Vannbaserte oppvarmings- og kjølesystemer (2014)
    • Ventilasjonsteknikk Del I (utgave 2019)
    • Ventilasjonsteknikk Del II (utgave 2019)
    • VVS-tegning med oppgavesamling
    • Kompendium for Fgass-sertifisering (2019)
    • Praktisk kuldeteknikk
    • RHB digitalt tillegg
    • Sanitærteknikk - Prosjektering og utførelse av sanitærinstallasjoner i bygg
    • Stensaas, Leif I. Ventilasjonsteknikk Del I - Grunnlaget og systemer (1998)
    • Tekniske bestemmelser - Standard abonnementsvilkår for vann og avløp
    • Kuldehåndboka 2007
    • Veileder for vannbehandling i lukkede energianlegg
    • Klimadata M21
    • Driftøk
    • Arbeidsdokument
      • Introduction to ventilation
      • Indoor climate
      • Humid air
      • Varmeoverføring
      • Basic fluid mechanics
      • Airflow requirements
      • Main types of ventilation systems
      • Airflow patterns in rooms (under construction)
      • Sound and noise reduction in ventilation systems
      • Energy use in buildings
      • Demand-controlled ventilation
      • Ducts
        • Ducts
        • Air tightness
        • Round ducts
        • Rectangular ducts
        • Joining of rectangular ducts
        • Pressure drop
        • Pressure loss in ducts
        • Pressure loss over components
        • System characteristics
        • Fan characteristic and operating point
        • Material requirements
        • Cleanness
        • Check of cleanness
        • Gravimetric measurement
        • Film thickness
        • Optical measurement
        • Duct cleaning
        • Manual methods vacuuming and wiping
        • Rotating brushes
        • Compressed air
        • Dry ice
        • Hanging
        • Labelling
        • Planning the duct system
        • Duct design for CAV systems
        • Supply air ducts
        • Bahco's 1/3 method
        • The velocity method
        • Constant pressure drop method
        • Static pressure recovery method
        • Constant size
        • Extract ducts
        • Duct desig of demand-controlled systems

    Arbeidsdokument

    • 12
      Ducts
    • 12.1
      Air tightness
    • 12.2
      Round ducts
    • 12.3
      Rectangular ducts
    • 12.3.1
      Joining of rectangular ducts
    • 12.4
      Pressure drop
    • 12.4.1
      Pressure loss in ducts
    • 12.4.2
      Pressure loss over components
    • 12.4.3
      System characteristics
    • 12.4.4
      Fan characteristic and operating point
    • 12.5
      Material requirements
    • 12.6
      Cleanness
    • 12.6.1
      Check of cleanness
    • 12.6.1.1
      Gravimetric measurement
    • 12.6.1.2
      Film thickness
    • 12.6.1.3
      Optical measurement
    • 12.6.2
      Duct cleaning
    • 12.6.2.1
      Manual methods vacuuming and wiping
    • 12.6.2.2
      Rotating brushes
    • 12.6.2.3
      Compressed air
    • 12.6.2.4
      Dry ice
    • 12.7
      Hanging
    • 12.8
      Labelling
    • 12.9
      Planning the duct system
    • 12.10
      Duct design for CAV systems
    • 12.10.1
      Supply air ducts
    • 12.10.1.1
      Bahco's 1/3 method
    • 12.10.1.2
      The velocity method
    • 12.10.1.3
      Constant pressure drop method
    • 12.10.1.4
      Static pressure recovery method
    • 12.10.1.5
      Constant size
    • 12.10.2
      Extract ducts
    • 12.11
      Duct desig of demand-controlled systems
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