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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🌿 Elevate your grow space with stealthy airflow and odor control—because your plants deserve the best.

BUILT TO LAST - Durable metal construction paired with Australian native activated carbon ensures long-lasting odor control and performance.
SPACE SAVVY DESIGN - Compact and lightweight with a reversible flange, fitting seamlessly into tight grow tents or ventilation setups.
CUSTOM AIRFLOW CONTROL - Stepless speed controller lets you dial in the perfect ventilation setting for any environment or need.
POWERFUL YET WHISPER QUIET - Experience robust 203 CFM airflow with noise levels as low as 49 dB—ventilation that won’t disrupt your space.
EFFORTLESS INSTALLATION MAINTENANCE - Includes mounting bracket and pre-filter for quick setup and easy upkeep—get your system running in no time.

The VIVOSUN Activated Carbon Filter Grow Air Carbon Filter features a powerful 203 CFM centrifugal fan with ultra-quiet 49 dB operation and stepless speed control. Designed for compact spaces, it includes a reversible flange and pre-filter for easy installation and maintenance. Built with durable metal and Australian native activated carbon, it ensures efficient odor control and ventilation for indoor gardening and climate control.

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Blade Length	4 Inches
Blade Material	Plastic
Color	Black
Size	Z4 4 Inch
Style	4'' with Speed Controller
Height	9.7 inches
Length	12 inches
Weight	8.1 Pounds
Width	10.2 inches
Shape	Round
Material Type	Metal
Number of Blades	1
Number of Speeds	3
Power Source	Corded Electric
Features	Lightweight
Wattage	68 watts
Included Components	Cord
Batteries Included?	No
Brand	VIVOSUN
Manufacturer	VIVOSUN
Item model number	Z4
Product Dimensions	24.64 x 23.62 x 10.16 cm; 3.67 kg
ASIN	B01CTM0H6I

VIVOSUN Activated Carbon Filter Grow Air Carbon Filter Odour Control with Australian Native Activated Carbon for Inline Fan Grow Tent, Pre-Filter Included, Reversible Flange

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