Storm-proof Louver

Storm-proof Louver

Introduction



Vertical Double Bank Louvre VDL150-3
Blade Pack Depth 145mm
Frame Depth 150mm
Pitch 75mm
Visual Impact Hidden
Free Area /


Rainwater Penetration
VENTILATION RATE WATER FLOW RATES Effectiveness Class
Volume
m³/s
Velocity
m/s
Supply
I/h
Penetrated
I/h
0.00 0.00 97.2 0 100% A
0.46 0.50 97.2 0 100% A
0.93 1.00 97.2 0 100% A
1.39 1.50 97.2 0 100% A
1.86 2.00 97.2 0 100% A
2.32 2.50 97.2 0 100% A
2.79 3.00 97.2 0 100% A
3.26 3.50 97.2 0 100% A

Coefficient Of Entry
  louvre face velocity air flow rate  
louvre pd
Pascals
m/s test
m³/s
theoretical
m³/s
coefficient
Ce
10.3 1.10 1.026 3.836 0.268
24.2 1.72 1.596 5.881 0.271
37.5 2.17 2.022 7.320 0.276
52.7 2.57 2.395 8.678 0.276
66.2 2.90 2.693 9.726 0.277
79.9 3.20 2.973 10.685 0.278
95.4 3.47 3.232 11.676 0.277
112.0 3.72 3.459 12.651 0.273
130.0 4.01 3.735 13.630 0.274
143.0 4.27 3.969 14.295 0.278
      mean Ce 0.275
      Class 3

Tested by BSRIA-EN-13030:2001



Design
Our performance louver systems are designed using air flow simulation by CFD(computatainal fluid dynamics)software to get best balance between air flow and rain defence performance



Testing
Weather Louvre: UK BSRIA/US AMCA Testing
The industry standard for weather testing of Louver in the UK was developed by BSRIA(Building Services Research & Information Association) and HEVAC adopted in 2001 as a British & European Standard: BS EN 13030:2001. The principles of EN 13030 are replicated in the USA under the AMCA Standard 500-L, “Laboratory Methods of Testing Louvers for Rating”
All of our louver systems have been tested either by BSRIA or by AMCA



Two key performance areas:
1. Rain Defence Classification
The ability to prevent rain water from penetrating the Louvre
Class Effectiveness Max. allowed rain penetration l/h/㎡
A 1 to 0.99 0.75
B 0.989 to 0.95 3.75
C 0.949 to 0.80 15.00
D Below 0.80 Greater than 15.00

NOTE: Water Penetration Effectiveness is measured for each of eight face velocities between 0m/s and 3.5m/s under fan driven wind at a speed of 13m/s and water sprayed as rainfall at a rate of 75 l/h condition.

2. Discharge Loss Coefficient Classification
A high coefficient means low resistance and high airflow performance
Class Airflow Effectiveness Performance Rating
1 0.4 to 1 Excellent
2 0.3 to 0.399 Very Good
3 0.2 to 0.299 Good
4 0.199 & below Fair


Bird Mesh Screen




Notes:
W--Width of the mesh
D--Diameter of the wire
Regular Size of Insect/Bird Mesh Screen(mm)
Mesh Width of the mesh Diameter of the wire


Insect Mesh Screen
1.5*1.5 0.25
2*2 0.5
2.5*2.5 0.5



Bird Mesh Screen
5*5 0.8
10*10 1、1.6
11.2*11.2 1.6
12.5*12.5 1.6

Notes:
S--SWD
L--LWD
T--Strand thickness
Bird Mesh Screen(Diamond)
Mesh Width of the mesh Stand thickness

Bird Mesh Screen(Diameter)
10*20 1、1.5
20*40 1、1.5

Project

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