Envirotech Systems Limited produces the Sand Tap Louver system which is a high efficiency system used to shield HVAC and ventilation systems against dust and sand particles. These louvers are the best to be used in industrial establishments, power plants and infrastructure projects in high dust areas. Our Sand Taps Louver is designed to provide the best performance in terms of airflow as well as reducing the ability to maintain the product as well as damage caused in its operation.