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![](https://upload.digoodcms.com/758/1658832308877/111.png)
Two key performance areas
1. Rain Defence ClassificationThe ability to prevent rain water from penetrating the Louvre
Class | Effectiveness | Max. allowed Rain penetration I/h/m2 |
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 |