Ruck 8 Inch Prime Mixed Flow Moves 656 CFM
Mixed flow sits between axial and centrifugal. The impeller pushes air along the duct and outward at once, which is how a compact housing still makes pressure. This one moves 656 CFM on 176W at 1.6A, from a one-phase AC motor turning about 3,223 RPM. Housing is plastic, the impeller is 3D-shaped, and a mounting bracket is in the box. It is ETL listed and made in Germany.
Sizing a Grow Room Ventilation Fan at 656 CFM
On an 8-inch run this suits a tent pair or a small room pulling through a carbon filter. Mixed flow holds up better than an axial booster when the filter loads. The limitation to plan around is speed. There is no switch on the fan, so it runs flat out unless you wire an external controller ahead of it. Budget for one if the room is anywhere near living space. The bracket is included and the cord is 5.5 ft.
Key Features
- 656 CFM: Mixed flow output that holds pressure against a loaded filter.
- 176W at 1.6A: Published draw on 120V, so the circuit can be planned properly.
- 3D Shaped Impeller: The blade form Ruck uses to lift efficiency and drop noise.
- Plastic Housing: Keeps weight low, though it carries more noise than metal.
- Mounting Bracket Included: Hangs on its own support rather than loading the ductwork.
- Motor in the Hub: The motor sits inside the fan hub, out of the weather and the dust.
- Fixed Speed: Turndown comes from an external controller, not a built-in switch.
Technical Specifications
| Specification | Value |
|---|---|
| Duct Size | 8 in |
| Airflow | 656 CFM |
| Power | 176 W |
| Current | 1.6 A |
| Voltage | 120V |
| Motor | One-phase AC |
| Impeller | 3D shaped, mixed flow |
| Housing | Plastic |
| Mounting | Bracket included |
| Speed Control | Fixed speed, external controller |
| Cord Length | 5.5 ft |
| Warranty | 3 years |