Vortex VTX-Series Powerfan, 8", 739 CFM

Steel Inline Duct Fan With Speed-Controller Support, 8in

A grow room's exhaust fan has to run for months without babysitting, so a fixed-speed, unreliable blower turns into a recurring maintenance headache rather than a set-and-forget component. The Vortex VTX-Series Powerfan is a steel inline duct blower with a hammertone powder coat finish and an extended collar that simplifies duct hook-up and taping, built for growers who want dependable, speed-controllable exhaust instead of a fixed-speed fan. Independent AMCA certification backs its published airflow and sound ratings, giving growers an audited number to compare against rather than marketing copy alone.

At 739 CFM, this 8-inch model is sized for mid-size grow rooms needing more static pressure, and it ships ready to mount horizontally or vertically with the included galvanized brackets.

Key Features & Benefits

• Extended collar — simplifies duct hook-up and taping during installation.
• Balanced motorized impeller — permanently lubricated ball bearings keep operation vibration-free over long runs.
• 6 ft power cord and galvanized brackets — support both horizontal and vertical mounting.
• 100% speed-controllable — the factory-installed 120V cord is compatible with the ACSC2 speed controller for external control.
• AMCA certified — performance and sound ratings are verified by the Air Movement and Control Association.

Who Should Use the VTX-Series

Growers running a single-fan exhaust setup who want the option to dial in airflow with an external speed controller, rather than living with a fixed-speed fan, are the target fit for the VTX-Series.

About Atmosphere

Atmosphere Inc., headquartered in Terrebonne, Quebec, Canada, manufactures the Vortex line of inline duct fans, including the VTX-Series, and holds AMCA certification covering both centrifugal and mixed-flow fan categories.

Frequently Asked Questions

What CFM does the 8-inch VTX-Series move?

This 8-inch VTX-Series model is rated to 739 CFM. Certified ratings for this and every other Atmosphere Vortex model can be looked up in AMCA's public certified-product database.

How do I mount this fan?

The included galvanized brackets support both horizontal and vertical mounting, so it fits inline runs in either orientation. The 6 ft factory power cord gives enough slack to position the fan away from the nearest outlet.

Is it compatible with a speed controller?

Yes, the factory-installed 120V power cord is 100% speed-controllable and works with the ACSC2 fan speed controller for external control. Running it on a controller lets you match airflow to changing temperature or humidity instead of leaving it at full speed.

How is the VTX-Series different from the V-Series or S-Line?

The base VTX-Series uses a standard balanced impeller design, while the V-Series adds a mixed-flow impeller that runs at a lower RPM for quieter operation, and the S-Line uses an AC brushless motor with dual mixed-flow impellers in a polycarbonate housing. All three share Atmosphere's AMCA-certified testing, so the choice mostly comes down to noise, airflow, and housing material.

Is the airflow rating independently verified?

Yes, this fan is AMCA certified, meaning its performance and sound ratings were verified by the Air Movement and Control Association rather than self-reported. That certification lets you compare it against other AMCA-listed duct fans on equal footing.