what is a weather louvre?
TRANSCRIPT
Air tightness Understanding the Part L requirements
Meet the author Weather Louvre Specification Guide
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Copyright 2008 IHS Inc. All Rights Reserved.Mark RoperPrincipal Test Engineer at BSRIAWeather Louvre TestingHigh Temperature FansControls testing
Copyright 2008 IHS Inc. All Rights Reserved.What is a Weather Louvre?A passive device, intended to allow the passage of air into or out of a building or ventilation system, while restricting the entry of rain
Copyright 2008 IHS Inc. All Rights Reserved.Weather Louvre SelectionAirflow/Pressure dropWater Penetration PerformanceBuilding LocationAestheticsAcousticsSecurityCost
Copyright 2008 IHS Inc. All Rights Reserved.AirflowCritical value is Air Velocity, at the Louvre Face
What air volume is required?How large is the louvre?
Face velocity (m/s) = Volume flow rate (m3/s) / Face area (m2)
Increased Face VelocityIncreased Pressure DropIncreased Energy Requirement==
Copyright 2008 IHS Inc. All Rights Reserved.Water PenetrationCritical value is Air velocity, at the louvre faceLocal weather conditionsLocation of the louvre exposed/sheltered?Level of weather tightness requiredIncreased Face VelocityIncreased Water Penetration=
Copyright 2008 IHS Inc. All Rights Reserved.Test MethodBS EN 13030:2001Ventilation for buildings. Terminals. Performance testing of louvres subjected to simulated rain
Copyright 2008 IHS Inc. All Rights Reserved.BSRIA Test Facility
Copyright 2008 IHS Inc. All Rights Reserved.
Copyright 2008 IHS Inc. All Rights Reserved.
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Copyright 2008 IHS Inc. All Rights Reserved.Water Penetration Test Results
Copyright 2008 IHS Inc. All Rights Reserved.Airflow Test Results
Copyright 2008 IHS Inc. All Rights Reserved.What the test cant tell you!Its not real life!Like car mileage figures good for comparisonsOnly one weather conditionOnly a 1m2 sampleAirflow issues framing effectsRain issues drainageInstallation Ongoing product quality
Copyright 2008 IHS Inc. All Rights Reserved.In SummaryAssess site conditionsUnderstand airflow requirementsIdentify permissible water penetrationUse test performance figures to inform selection
Copyright 2008 IHS Inc. All Rights Reserved.Thank you! Any Questions?
Mark [email protected]
Copyright 2008 IHS Inc. All Rights Reserved.