External Louvres 4 Large Format Fixed Blade External Louvres WG-EF WG-RF 6 72 78 Introduction WG large format louvres are suitable for most external walling / screening applications. Available systems include horizontal and vertical continuous or mullion screens, doors, access panels, penthouse units, mansard roof panels and enclosures. Product Description or mullion style joints t Continuous t 65, 75 and100mm pitches for mansard, standard and sheltered installations t Vertical blade option with pitches at 75, 100 & 150mm t Blade alignment strips provided on continuous sections Nom. Nom. + 60 Nom. - 20 Features Nom. - 6 Nom. - 32 External Flanged Louvre Recessed Frame Louvre Drip Cill Nom. WG-EF WG-RF DC Finishes PPM9006 (RAL 9006 Matt Silver) PPM9010 (RAL 9010 20% Gloss White) PPG9010 (RAL 9010 Gloss White) available on request Other colours or anodised Weight WG 13.0 kg/m 2 panel Sizes Nom. W 125 - 2000 mm Nom. H 200 - 2015 mm For larger sizes please contact head WG-RF WG-EF Panel Sizes From 300mm x 300mm to 2000mm wide x 1500mm high 1500mm wide x 2000mm high. Maximum height for multiple panel assembly is 4000mm but may be greater if suitable structural support work is available. Fixing SF LF STS NF The above drawing shows a multiple WG-EF split along the width - Aluminium strips allow for expansion and contraction, due to changes in temperature. Screw Rear lug Screw through stack No Screen Options BS Galvanised steel bird screen IS Aluminium insect screen Other options available on request Support angles to be supplied by others to suit site conditions Advantages t Lightweight, extruded aluminium frame and blade system t Weather resistant design on each blade t Rear rain trap Order Example Continuous is also available for joining multiples WG-EF/800/500/PPM9006/SF/BS Louvre Type Nominal Width Nominal Height Finish Fixing Screen Option Waterloo 3.0 LF - Rear Free Area WG 24% - 55% Tel: +44 (0) 1622 717861 External Louvres 5 Large Format Fixed Blade External Louvres WG-EF WG-RF Selection Example for a 2000mm wide x 1500mm high louvre with 75 and 100mm blade pitches handling 4000 l/s 250 +5 500 +2 1k 0 2k -6 :4000/2 = 2000 l/s/m From nomogram dBA Pa Mean Jet Velocity Free Area x width 75mm pitch 50 12 2.8 m/s 0.76 x 2 = 1.52m2 dBA is the noise rating of the louvre based on sound power level. To determine octave band sound power levels, apply the correction factors shown to the dBA level. 4k -12 DUCT HEIGHT, H (mm) FREE AREA, FA (m 2/m WIDTH) AIR FLOW RATE l/s PER m WIDTH 65mm PITCH 13000 MEAN AIR VELOCITY THROUGH BLADES (m/s) 6000 EXHAUST STATIC PRESSURE LOSS (Pa) 300 NOISE LEVEL dBA LW 5000 0.1 3000 500 0.2 2500 75 2000 65 1500 55 1000 45 800 35 25 600 8 7 6 5 4 3 2 100 50 10 5 150 100 600 0.11 1 500 500 0.23 600 600 0.29 1000 0.52 1200 0.64 1500 0.81 1800 0.98 2000 1.1 3000 1.7 0.24 0.28 20 10 5 400 0.5 1000 0.46 1200 0.56 1000 0.48 1200 0.6 1 0.5 PIVOT LINE LOUVRE EFFECTIVENESS (%) 300 20 1 100 H (mm) FA ( m 2/m) 0.12 50 500 300 300 100mm PITCH SUPPLY STATIC PRESSURE LOSS (Pa) 4000 100 75mm PITCH H (mm) FA (m 2/ m) H (mm) FA (m2/m) 10000 9000 8000 7000 200 100mm pitch 47 9 2.6 m/s 0.81 x 2 = 1.62m 2 Static pressure scale is for exhaust applications with or without birdscreen. A factor of 1.5 should be applied for intake louvres and a factor of 1.1 should be applied for Insect Screen. Frequency Spectrum Corrections (Hz) 125 +6 Total air volume/width WEATHER RESISTANCE 1500 0.72 0.26 1500 1800 0.86 2000 0.96 80 0.76 1800 0.92 2000 1.0 60 40 3000 20 0 0 1.0 2.0 3.0 FACE / DUCT VELOCITY (m/s) 4.0 1.5 3000 1.56 louvre based on tests to HEVAC Technical - 'Laboratory Testing & Rating of Weather Louvres when subjected to simulated rain' Waterloo 3.0 Tel: +44 (0) 1622 717861