Envirotech Systems Limited is a company that provides high performance Sand Trap Louver systems that will block the entry of sand, dust, and other debris into the HVAC and ventilation systems. The products are also designed to withstand tough weather conditions so that they can have clean air flows and better protection of equipment. Sand Trap Louver solutions offer durability and eff... https://www.envirotechltd.com/blog-detail-premium-sand-trap-louvers-for-industrial-and-commercial-use