Specification Brand : Spider Farmer BulletPoint1 : 【QUIET & POWERFUL】Mixed flow design combined with a EC motor that powers high-quality impellers makes this fan truly energy efficient than a traditional line fan. With only 35 watts of power but gives a strong airflow up to 205 CFM, very low noise level, only produces 28 DB, this 4” exhaust fan is silent. Lightweight ABS blades reduce the airflow resistance, add airflow by 40%. BulletPoint2 : 【BUILT TO LAST】Made of premium ABS plastic housing for superior durability, IP42 rated, making it highly resistant to dust and liquids, and performs well even in harsh environments. The exhaust fan is ETL/FCC listed. BulletPoint3 : 【ADJUSTABLE SPEED】The fan speed controller allows you to set your fan speed freely and it is essential for optimal growth of your plant. BulletPoint4 : 【WIDE APPLICATIONSL】 Designed for air circulation boosting of cooling and heating systems and air-circulation. The 4 Inch Inline duct fan is a great option for grow tents, closet, storage rooms, kitchens, bathrooms, basements and more. BulletPoint5 : 【WORRY FREE SHOPPING】Spider Farmer promises to provide excellent customer service support before and after buying. If you have any questions, please feel free to contact us via email. CenterToCenterSpacing : 18 inches Collection : Inline Fan Kits Color : White CompatibleMaterial : Plastic ControllerType : Button Control ControlMethod : application CustomerPackageType : Standard Packaging ElectricFanDesign : exhaust_fan ExternallyAssignedProductIdentifier1 : 0782429188322 ExternallyAssignedProductIdentifier2 : 782429188322 IndoorOutdoorUsage : indoor ItemName : Spider Farmer 2023 update Quiet 4‘’ Inline Duct Fan with Speed Controller, 205 CFM EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, Indoor Growing and Planting ItemPackageDimensions_Height : 32.258 centimeters ItemPackageDimensions_Length : 23.368 centimeters ItemPackageDimensions_Width : 26.416 centimeters ItemPackageQuantity : 32 ItemShape : Rectangular ItemTypeKeyword : greenhouse-ventilation-equipment Manufacturer : GRELWT Material : Plastic Material1 : Polyethylene (PE) Material2 : Aluminum ModelNumber : 4 inch with speed contoller MountingType : spider NoiseLevel : 28 decibels NumberOfBlades : 4 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : SF-4Inlinefan PowerSourceType : Corded Electric ProductDescription : Greenhouse Film 6 mil Thickness, Covering Plastic, UV Resistant ProductSiteLaunchDate : 2022-11-23T17:04:14.013Z RecommendedUsesForProduct : Indoor, Outdoor RecommendedUsesForProduct1 : Cooling RecommendedUsesForProduct2 : Air Circulation SafetyWarning : [The product_description's safety instructions combined with packaging safety warnings, if available] Size : 4inch Style : Modern SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Plastic UltravioletLightProtection : True UnitCount : 1 Voltage : 240 volts WaterResistanceLevel : waterproof Wattage : 30 watts