An essential component for ventilation of a building is an air louver. It enables to pass through the air while preventing unwanted elements such as dirt, water, and debris from entering. The design of air louver involves a number of fixed or movable blades mounted in a frame. An air intake louver is used to provide fresh air to a building. Its the arrangement of a louvers fixed blades that allows air to flow while preventing water from entering at a nominal inlet speed. The purpose of air louvers in a building is to provide resistance to rainwater, outside noise, speedy winds, etc.