The Sand Trap Louver systems are made to take out sand, dust and other particulate matter on the incoming airstream in extreme conditions. Envitech systems Limited is a company that provides Sand Tap Louver solutions that are high efficiency and can be use in coastal, desert areas and industrial use. These louvers safeguard HVAC systems, gas turbines, and ventilation equipment through... https://www.envirotechltd.com/sand-trap-louver