Genuine Daikin 1705430 Indoor Air Suction Grille Assembly is the intake (suction) grille that draws room air into the indoor unit across its filters. When it cracks or loosens it can rattle in the airflow, sit proud, or disturb the even intake the unit relies on. The genuine suction grille is moulded to the unit's opening, seating flush and quiet where a generic substitute can gap or vibrate.