What is AMCA 550?

AMCA 550 is the Test Method for High Velocity Rain Resistant Louvers and is not to be confused with AMCA 500-L Wind Driven Rain. The International Mechanical Code and Florida Mechanical Code dictates that all intake and exhaust louvers located in the Hurricane Prone need to comply with AMCA 550. The AMCA 550 standard subjects a louver to 35, 70, 90 and 110 MPH external wind while spraying horizontal driving rain at a rate of 8.8 in./hr. The louver must show that no more than 1% of the total sprayed water volume is measurable in the water collection apparatus positioned in the test chamber behind the louver.