Louder than I thought too. Have a muffler and an enclosure made from 2" fiberglass ceiling tiles...back looking for something else.

How loud is this fan?

Best value for the money...If you have ever lived anywhere that had A/C compressors outside of your window...it's as loud as that. Yes, what you here is more the whooshing from the air movement than the fan motor. Too help with that...I ran my exhaust tubing to the back of the tent...away from the door...helped a lot.. Also; there is no "hum" in this controller whatsoever. A problem I had with another brand. Hung motor using HD zip ties...stopping any potential vibration...This fan is also very strong...I have to run it as low as it goes...more than enough...kinda too much for the 2 X 4 X 6. As a kicker...Vivosun has been around for a long time and have always treated me right.BUY IT it you'll like it!....

Is it discret shipping?

No discrete shipping. The box has Vivosun's name and inline fan all over the box. Amazon doesn't tell you that. They do on some things but this isn't one of them.

How many watts would this fan use running it at say half volume using the included controller?

If the information for the electrical rating is correct as stated. The fan at full speed draws 1.1 amps. That would be 132 watts at full speed so one could conclude an approximate watt draw of 66 watts. But electricity being what it is and the construction of the component parts I believe you could safely say 75-100 watts. May I ask why you are concerned with the watts?

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Inline Duct Fan, 100 mm, 345 m³h with Variable Speed Control for Grow Tent, Ventilation, Plant Tent, Indoor, Garden, Ventilation Fan, Z4 Pipe Fan, Black

Inline Duct Fan, 100 mm, 345 m³h with Variable Speed Control for Grow Tent, Ventilation, Plant Tent, Indoor, Garden, Ventilation Fan, Z4 Pipe Fan, Black

Product ID: 263761209

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Details

Brand
VIVOSUN
Colour
Black
Electric fan design
Blower
Power source
Corded
Style
Industrial
Product dimensions
23.6D x 24.6W

⚡68W power efficiency

🌬️345 m³/h airflow capacity

🎚️stepless variable speed control

Description

🌿 Elevate your indoor garden with silent, smart airflow—because your plants deserve the best.

CUSTOM AIRFLOW CONTROL - Stepless speed adjustment lets you dial in the perfect ventilation level for every growth stage.
WHISPER QUIET OPERATION - At only 49 dB, enjoy powerful airflow without the distracting noise—perfect for focused indoor gardening.
POWERFUL YET ENERGY SMART - Maximize airflow with just 68 watts—eco-friendly ventilation that keeps your grow tent thriving.
EFFORTLESS SETUP MAINTENANCE - Quick-install mounting bracket and rope hangers make setup a breeze—get growing faster with less hassle.
VERSATILE VENTILATION SOLUTION - Ideal for grow tents, indoor gardens, and climate control—engineered for professional-grade air quality.

The VIVOSUN Inline Duct Fan (100 mm) delivers a robust 345 m³/h airflow powered by an energy-efficient 68W motor. Featuring a stepless variable speed controller and ultra-quiet operation at 49 dB, it’s designed for seamless ventilation in grow tents and indoor gardens. Lightweight and easy to install with mounting brackets and rope hangers, this fan combines axial and centrifugal technology for optimal air circulation and temperature control.

Specifications

Brand	VIVOSUN
Model Number	Z4
Colour	Black
Product Dimensions	24.64 x 23.62 x 10.16 cm; 3.67 kg
Power / Wattage	68 watts
Voltage	5 Volts
Noise Level	49 Decibels
Special Features	Lightweight
Item Weight	3.67 kg

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