Air Louver

A louver is a ventilation product that allows air to pass through it while keeping out unwanted elements such as water, dirt, and debris. A number of fixed or operable blades mounted in a frame can provide this functionality.
The basic considerations for selecting louvers are Free Area and Resistance to airflow (Pressure loss). Once these concepts are understood, they can be used to properly apply a louver.
The fresh air louver is used in cooling and ventilation application.The existence of filter provide the entrance of clean air to the system.
The FAL is a simple form of filter louvers. It is composed of an exhaust louver with an aluminum filter fixed at the back.