Labels:anechoic chamber | door | shelf | sky | windowpane OCR: Standard 500-L Louvers Rejection Effectiveness Classes 99% to 100% 95% to 98 9% 94 9% 80% below 80% 3 rain/29 mph wind rain/50 mph wind Four performance classed and two levels of simulated weather conditions are obtained with his test. Again, no per hour rain/50 mph wind category in the BSRIAIHEVAC standard. Jevels BSRIA HEVAC
