First, the swirl diffusers Product description ?? Material: Aluminum ?? structure:? Frame fixed, adjustable inner core swirl blades. ? ?? Features: a swirl characteristics of the temperature decay faster, prevent low variable air, etc., is a versatile new delivery outlet, is widely used in the exhibition hall, swimming pool, airport halls, workshops and other large venues storey . ?? ?? In the cooling conditions, adjusting the fan blades to make it through the cold open, distributed evenly spread around, so to achieve the best cooling effect. ? ?? Adjust fan in heating conditions, so that overlap, so that hot air can quickly reach the ground, so as to achieve the best results blast. ? ?? Can add accessories: air flow control valve, electric actuator.