An air filter in an air conditioner is used to help keep dust, dirt and airborne particles from entering in to your home while the air conditioner is operating. The air filter is beige in color and measures 17” W x 10” H. This filter is for the right side, the left side must be ordered separately. Over time the filter will become dirty, clogged, or damaged and will need to be cleaned or replaced. A dirty or clogged filter will prevent cool from air circulating in the room. This is a genuine OEM part.