inline duct fan 4 inch best sellers

#1 D4 4 Inch 195 CFM Inline VIVOSUN D4 4 Inch 195 CFM Inline Duct Ventilation Fan, HVAC Vent Blower for Grow Tent, Attic, Basements or Kitchen, Hydroponics Exhaust Booster Fan

$25.64 on Amazon

#2 4 Inch Inline Booster Hon&Guan 4 Inch Inline Booster Duct Fan with Speed Controller - 130 CFM Airflow with 6W Ultra-Low Power and Low Noise

$27.99 on Amazon

#3 4 Inch Draft Blocker KIKERIKE 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector

$9.77 on Amazon

#4 4 Inch Air Carbon Filter VIVOSUN 4 Inch Air Carbon Filter Smellines Control with Australia Virgin Charcoal for Inline Duct Fan, Grow Tent, Pre-filter Included, Reversible Flange 4" x 12"

$31.99 on Amazon

#5 4 Inch Duct Fan Inline Voltset 4 Inch Duct Fan, Inline Ventilation Exhaust Fan, 280 CFM Duct Intake High Efficiency Air Fan for Vent Bathroom, Kitchen, Grow Tent, Hydroponics, 3D Printer

$44.99 on Amazon

#6 🔥 Inline Duct Fan 4 Inch VEVOR Inline Duct Fan, 4-Inch 205 CFM with Temperature Humidity Controller, Quiet EC-Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

$48.92 on Amazon

#7 Grow Tent Ventilation VIVOSUN Grow Tent Ventilation System, 4 Inch Inline Duct Fan with Speed Controller, 4'' Carbon Filter, and 8ft. Ducting Combo, Air Cooling and Filtration Kit for Grow Tent, Hydroponics

$89.99 on Amazon

#8 4 Inch Inline Duct Fan ONVEAN 4 Inch Inline Duct Fan with Speed Controller, Upgraded Inline Fans High-Efficiency Exhaust Duct Fan, Low Noise HVAC Ventilation in Basement Bathroom Workshop Attic Grow Tent

$26.99 on Amazon

#9 R4 4 Inch 190 CFM Inline VIVOSUN R4 4 Inch 190 CFM Inline Duct Ventilation Fan with Variable Speed Controller for Grow Tent

$53.99 on Amazon

#10 4 Inch Air Carbon Filter ATOUR 4 Inch Air Carbon Filter with Australian Virgin Charcoal – Odor Control. Built-in 5.5" Quiet Fan with Speed Control, for Inline Duct Fans & Grow Tents. Includes Vent Cover + Pre-Filter 4"x13.4"

$35.97 on Amazon

#11 4 to 3 Inch Duct Reducer 4 to 3 Inch Duct Reducer, Hon&Guan Galvanized Steel Duct Increaser 4 to 3 Duct Reducer for 3/4 Inch Duct, Inline Duct Fan, Grow Tent Ventilation System-Black.

$13.99 on Amazon

#12 🔥 4 Inch Inline Duct Fan FanGoFast 4 Inch Inline Duct Fan 130CFM Airflow with Stepless Speed Control Low Noise Energy Saving Ventilation Booster Fan for Grow Tents,Workshops,Basements

$23.19 on Amazon

#13 🔥 4 inch Air Carbon Filter MELONFARM 4 inch Air Carbon Filter Smelliness Control with Australia Virgin Charcoal, Built-in 14cm Fan Low Nois and Speed Controller, Smelliness Scrubber for Inline Duct Fan, Grow Tent 4" x 14"

$47.99 on Amazon

#14 2x2 Grow Tent Kit with VIVOSUN 2x2 Grow Tent Kit with Plant Grow Light LED 100W, Complete Indoor Grow Tent 24"x24"x48" Indoor Greenhouse 4 Inch 190CFM Inline Fan, Carbon Filter and 8ft Ducting Combo

$269.99 on Amazon

#15 4" Air Filtration Kit Hon&Guan 4" Air Filtration Kit: 4 Inch Inline Duct Fan with Speed Controller, 10" High Carbon Filter, 8 Ft Ducting & Rubber Coupler, Ventilation System for Grow Tents, Indoor Gardening, Hydroponics

$75.99 on Amazon

#16 4 Inch Inline Booster iPower 4 Inch Inline Booster Duct Fan 100 CFM HVAC Exhaust Ventilation Blower with Low Noise for Grow Tent, Basements, Bathrooms, Kitchens and Attics

$15.37 on Amazon

#17 🔥 4 Inch Air Carbon Filrer Spider Farmer 4 Inch Air Carbon Filrer Smelliness Control with Premium Australia Virgin Charcoal for Inline Duct Fan, Grow Tent Odor Control, Hydroponics, Pre-Filter Included, Reversible Flange

$46.99 on Amazon

#18 🔥 4 Inch Air Carbon Filter HYDROWE 4 Inch Air Carbon Filter for Grow Tent,Smellines Control with Australia Virgin Charcoal for Inline Duct Fan，Hydroponic Growth,Pre-Filter Included

$30.99 on Amazon

#19 🔥 4 Inch 195 CFM Inline iPower 4 Inch 195 CFM Inline Fan, Air Carbon Filter, 8 Feet PVC Ducting, Speed Controller, Rope Hanger, Vent Exhaust for Grow Tent Ventilation

$96.90 on Amazon

#20 🔥 4 Inch 195 CFM Exhaust HealSmart 4 Inch 195 CFM Exhaust Inline Vent Booster Blower and 8 Feet Non-Insulated Flex Air Aluminum Foil 2 Clamps for Indoor Grow Tent Hydroponics Ventilation, Quiet, Fan+Ducting

$38.22 on Amazon