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 D12 Intelligent Environmental Dehumidifier

Product ID: 261686506

Details

Brand
VIVOSUN
Capacity
1 gallons
Colour
White Or Gray
Floor area
215 Square
Included components
Drain Hose
Model name
VSE-ADD

💨195 CFM airflow

🔇30 dB ultra-quiet

🔥ETL safety & auto-reset

₩1307152

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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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 housing ensures your setup stays safe and reliable 24/7.
WHISPER QUIET OPERATION - Enjoy near-silent 30 dB performance thanks to advanced flow deflector tech—no distractions, just pure airflow.
POWERFUL 195 CFM AIRFLOW - Turbocharge your ventilation with a robust 2500 RPM fan that keeps your grow tent or room fresh and perfectly climate-controlled.
VERSATILE CLIMATE CONTROL - Perfect for hydroponics, grow tents, basements, or kitchens—reduce humidity, block odors, and maintain ideal temperatures.
EFFORTLESS INSTALLATION MAINTENANCE - Quick-lock flanges and a 5.9-foot cord make setup a breeze, while detachable blades simplify cleaning.

The VIVOSUN Inline Duct Fan 100 mm delivers a powerful 195 CFM airflow at 2500 RPM with whisper-quiet 30 dB operation. ETL-listed for safety with an automatic reset motor and flame-retardant housing, it’s designed for easy installation and maintenance. Ideal for hydroponics, grow tents, and general ventilation, it efficiently controls humidity, temperature, and air quality to optimize your environment.

Specifications

ASIN	B0F43NRD96
Best Sellers Rank	1,473,456 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 1,830 in Dehumidifiers
Brand Name	VIVOSUN
Capacity	1 gallons
Colour	White Or Gray
Country of Origin	China
Customer Reviews	4.3 4.3 out of 5 stars (100)
Dehumidification Capacity	12 Liters per Day
Floor Area	215 Square Feet
Included Components	Drain Hose
Item Dimensions D x W x H	27.5D x 48.2W x 18.5H centimetres
Item Highlight	Up To 12L/Day, 2L Water Tank,Temperature & Humidity Sensor Probe
Manufacturer Contact Information	VIVOSUN
Model Name	VSE-ADD
Model Number	VSE-ADD12
Number of Items	1
Number of Packs	1
Operation Mode	Automatic
Other Special Features of the Product	with Temperature & Humidity Sensor Probe, Smart Remote Control, Designed for Grow Tents
Recommended Uses For Product	Residential
Tank Volume	2 Litres
Unit Count	1.0 count

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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