Labels:anechoic chamber | book | shelf | sky OCR: AMCA International Certified Ratings Program The Certified Ratings Program requires periodic retesting fevery three years to verify performance The program also allows for challenge testing which can be initiated by competing manufacturers The AMCA Certified Ratings Program is far more rigorous than any progr am commonly used in the UK The Building Services Research and Information Association (BSRIA) has developed test standards on behalf of the Heati na and Ventilating and Air Conditioning Manufacturers Associ ation (HEVAC However there no system with the BSRIA/HEVAC program supply performance information for product compar isons nor there periodic re-testing The bottom- -line is that AMCA International's Certified Ratings Program helps people make informed decisions on purchasing and sp ...