NATURAL VENTILATION SYSTEM The Complete Solution - Gilberts ...

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Intake LouvresGilberts Natural Ventilation intake louvres provide a highweather efficiency design with only a standard single louvrebank arrangement. Under driving wind and rain conventionalsingle bank louvres will allow some degree of water ingress.With motorised dampers (and possibly coils) behind the louvrethis is undesirable and for this reason Gilberts NaturalVentilation louvres are all of a high efficiency design asstandard.Our slender weather efficient, patented louvre design is not onlynarrow but also offers a much lower pressure resistance thanconventional double bank high weather protection designs.This allows us to use smaller louvre areas for any given airrequirement or, in effect, simply provide more air, size for size ascompared to competitive designs. A key benefit here is that thisreduces the size requirements not only for the louvre but alsofor expensive associated components like dampers andheating/cooling coils to ensure maximum design cost efficiency.Manufactured from extruded aluminium our louvres arestructurally very strong and can be fitted into either thewindow openings or into the walls.All louvres are fitted with bird guard screens as standardwith insect screens and weather cills also optionally available.A durable polyester powder finish to any BS/RAL colour alsoallows architectural choice to blend or contrast with the buildingstructure as requiredType NV-WHF/75- Flange Face BorderStructural Opening = List Width or Height5mmList Width or Height _10mm7PitchDimension over Flanges = List Height +45 (+ _ 1mm)121mmType NV-WHC/75- Channel Frame BorderStructural Opening = List Width or Height75m mP i t c hDimension over Channel = List Height _ 10 ( + _ 1mm)121mm14
Efficiency GraphTesting in accordance with European Standard EN13030 forweather louvre Performance shows our WH unit be 99.5%effective in screening/exhaust applications and 99% effectiveeven with face velocities of up to 1m/sec (rated at class ‘A’).The performance graphs below illustrate effectiveness underdiffering weathering parameters.All testing was conducted in accordance with EuropeanStandard EN 13030 ie: simulated conditions of 13m/sec (30mph)wind speed with heavy rain. Even at extremes of selection theunit offers excellent weather protection.Similarly the pressure loss graph clearly indicates the minimalpressure losses incurred by the WH design. Performance atthis level ranks the units alongside the very best in performancelouvres.Water Repellent & Drainage FeaturesAll Natural Ventilation assemblies are normally provided asstandard with a high efficiency weather louvre on the outside.These units have been classified to the current weather louvretest standard reference BS EN 13030 and offer a high degreeof water protection.If however a small amount of water does pass through theweather louvre blades, provision has been built in to the NaturalVentilation design which will cater for collection and the drainageof this water back to the outside via the lower section of theassembly.This design is similar to the design used on some double glazedunits and prevents water lodging in any part of the assembly.It is however recommended that the units are cleaned on aregular basis with all drain channels checked.ing parameters.vc Pressure/Volume Graph Effectiveness/Volume FlowGraphLOUVRE PRESSURE DROP Pa807060504030201052A I R F L O W R E S I S T A N C E0 . 5V E N T I L A T I O N R A T E P E R m2O F L O U V R EF A C E A R E A ( m3/ s / m2)T a b l e 11 . 02 . 03 . 0EFFECTIVENESS %10090807060500W E A T H E R E F F I C I E N C YV E N T I L A T I O N R A T E P E R M3( m / s / m0 . 5 1 . 0 1 . 5 2 . 02L O U V R E F A C E A R E AN O T E : A ) 13m / s W I N D S P E E D I N A L L T E S T S2B ) 75m m / m W A T E R S P R A Y O N T O L O U V R E F A C EI N A L L T E S T S2)T a b l e 215
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Page 6 and 7: Mistrale NaturalVentilationOur Mist
Page 8 and 9: Mistrale NaturalVentilationMistrale
Page 10 and 11: Mistrale NaturalVentilationModel EE
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Page 16 and 17: Volume Control DamperControllabilit
Page 19 and 20: Heat output against temperature dif
Page 21 and 22: Roof Top Penthouse LouvreThe Gilber
Page 23 and 24: Type 2 - Exhaust Turret Terminal wi
Page 25 and 26: Airflow DiagramsIntake or Exhaust T
Page 27 and 28: 27UnitVNT/1VNT/2PressureDrop@1m/s0.
Page 29 and 30: Acoustic InformationExtensive acous
Page 31 and 32: Control StrategyThe system maintain
Page 33 and 34: System PerformanceNatural Ventilati
Page 35 and 36: Ordering SpecificationPenthouse Ter

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