About This For Mini Greenhouse: the package includes 2 sets of 4 inch inline duct fans and 4 duct clamps, which will facilitate stable fixation of the exhaust fans; 2 way of connecting the duct fans: the parallel connection helps you double the air ventilation volume to 220 CFM and the series connection solve insufficient power for long duct ventilation Safety Protection: The 4 inch exhaust fans can prevent overheating or other safety issues; The built in fixed motor design can prevent the hazards of electrocution caused by leakage; A switch controller is designed into the 6.5 feet power cord, and there is no need to plug and unplug the power plug frequently and worried about the leakage caused by the wet plugging ares in humid conditions. Powerful Airflow and Durability: these 7 blades vent blower with a fan speed of 2800 RPM can create an airflow of 110CFM; As made of rustproof blades and coated with corrosion proof material, these 4 inch inline booster fan have a longer service life, even in hot and humid environments Low Noise Operation: the inline fans adopt advanced noise reducing technology that ensures the sound output to just 30 dB, which would not disturb you; Ideal for use in spaces where noise is a concern, like bedrooms, kitchen and living rooms Wide Applications: These exhaust fans can improve airflow to reduce humidity of grow tent, block odors, and lower temperatures in grow rooms, basements, or kitchens; These are also widely applied in bathrooms, workshops, garages, attics and etc., and boost airflow in HVAC systems Overview Brand : Dreyoo Color : Black Electric fan design : Exhaust Fan Power Source : Corded Electric Style : 4'' Product Dimensions : 6.69"D x 6.1"W x 6.1"H Room Type : Bathroom, Bedroom, Kitchen Special Feature : Value Package, Powerful Airflow, Low Noise Recommended Uses For Product : Air Circulation Mounting Type : Duct Mount
