Is my fan defective? For such a small fan it is extremely loud.

Use light weight clipper oil on the moter behind fan blades, also use tape to hold to pieces together after twisting back together. I own three need to add oil to all. All have been running non stop for over 6 months.

Can you attach a variable speed controller to this

You can, however, with just 200 CFM of air movement you may want to just keep it on full. The motor will make more humming noise if you use a speed controller to decrease speed. I found it makes less noise on full than it does if you decrease the speed which increases motor hum noise considerably.

If i use this fan as my exhaust fan for my 3ft×3ft×6ft grow tent, and use the cheaper less powerful 100cfm as an inline fan would that suffice?

Hey man i dont know where you live? But im in new england and heat is usaully temporary problem for a few months. But the 4 in didnt cut it i ended up buying the 6 inch kit with carbon filter and still have the 4 inch. This year is brutal and glad i switched in april. Honestly i would get the 6 or even the 8 with adjustable speed. I struggled to justify the costs myself but its gonna save money down the line and You will have room for lose of efficency with bends and dirty blades. But hey everyone journey is different. Its just cheaper to go bigger then at the minimum CFM or btu or any hvac project. It wont work as hard and run hard at 100% power

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VIVOSUN D4 4 Inch 195 CFM Inline Duct Ventilation Fan HVAC Vent Blower for Hydroponics Grow Tent

Product ID: 253746898

Details

Brand
VIVOSUN
Colour
Black
Electric fan design
Floor Fan
Mounting type
Duct Mount
Power source
Corded
Product dimensions
17.8D x 18.5W

💨195 CFM airflow

🔇30 dB ultra-quiet

🔥ETL safety & auto-reset

$180.14

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Description

💨 Elevate your airflow game — quiet, powerful, and safe ventilation that keeps you ahead of the curve!

SAFETY FIRST DESIGN - ETL-listed motor with automatic reset and flame-retardant junction box keeps your environment secure and worry-free.
WHISPER QUIET OPERATION - Enjoy near-silent performance at just 30 dB, ensuring your workspace or grow area stays peaceful and distraction-free.
POWERFUL 195 CFM AIRFLOW - Turbocharge your grow tent or room ventilation with a robust 2500 RPM motor delivering optimal air circulation.
VERSATILE VENTILATION SOLUTION - Perfect for hydroponics, kitchens, basements, or any space needing humidity control, odor blocking, and temperature regulation.
EFFORTLESS INSTALLATION MAINTENANCE - Quick-lock flanges and a 5.9-foot cord make setup a breeze, while detachable blades simplify cleaning.

The VIVOSUN D4 4 Inch Inline Duct Ventilation Fan delivers a powerful 195 CFM airflow at 2500 RPM with whisper-quiet 30 dB operation. Designed with safety in mind, it features an ETL-listed brushless motor with automatic reset and flame-retardant components. Easy to install and maintain, this compact fan is ideal for hydroponic grow tents, kitchens, basements, and more, ensuring optimal air quality, temperature, and humidity control.

Specifications

ASIN	B01M7S46YZ
Air Flow Capacity	195 Cubic Feet Per Minute
Best Sellers Rank	#118,830 in Kitchen ( See Top 100 in Kitchen ) #2,197 in Cooling Fans
Blade Length	4 Inches
Blade Material	Plastic
Brand Name	VIVOSUN
Collection Name	Greenhouse Ventilation Equipment
Color	Black
Connector Type	Standard wall outlet connector
Control Method	Push Button
Controller Type	Button Control
Customer Reviews	4.2 4.2 out of 5 stars (12,962)
Electric Fan Design	Floor Fan
Finish Type	Powder Coated
Included Components	Cord
Indoor Outdoor Usage	Indoor
Installation Type	Portable
Is Electric	Yes
Is Product Cordless	No
Item Dimensions D x W x H	17.8D x 18.5W x 17H centimeters
Item Weight	1.13 kg
Main Power Connector Type	Standard household electrical outlet connector
Manufacturer	VIVOSUN
Material	Plastic
Model Name	GDFPA
Model Number	GDFPA-100
Motor Type	brushless
Mounting Type	Duct Mount
Noise Level	42 Decibels
Number of Blades	3
Number of Power Levels	1
Number of Speeds	1
Part Number	GDFPA-100
Power Source	Corded Electric
Recommended Uses For Product	Ventilating
Room Type	Kitchen
Size	D4 4 Inch
Smart Home Compatibility	Not Smart Home Compatible
Special Features	Lightweight
Specification Met	ETL
Speed	2500 RPM
Standby Power Shutoff	High Efficiency
Style	Industrial
Switch Type	Push Button
Theme	No Theme
UPC	714119465567
Unit Count	1 Count
Voltage	120 Volts
Wattage	28 watts

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$180.14

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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The delivery time was excellent, and the packaging was secure.

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