Revised from ANSI/AMCA Standard 500-L, ANSI/AMCA Standard 500-L-12 (Rev. 2015) establishes uniform laboratory test methods for louvers and includes test procedure for rating sand louvers. Revised from AMCA Publication 511, AMCA Publication 511-10 (Rev. 2015) dictates proper presentation of data and other required technical procedures for certification of air control devices under AMCA Certified Ratings Program and adds sand louver certification.