747 CFM on 124 Watts From the 8 Inch EC
On the 8 inch S-Prime EVO EC, 747 CFM from 124W works out at about 6 CFM per watt. That is strong for a fan carrying this much acoustic insulation. Maximum current is 1.6A and the impeller tops out at 3,170 RPM. The motor is rated IP54 behind an IP44 terminal box. Galvanized steel puts the weight at 20.3 lbs, roughly double a bare plastic-bodied fan of the same duct size.
Running a Sound Insulated EC Fan on a Controller
An EC fan without a controller spends most of its advantage, so it is worth budgeting for one alongside it. Any 0-10V source will drive it, the MTP 21 included. Turning it down drops the noise and the draw together, which a triac-dimmed AC fan cannot manage. Space is the thing to check before it arrives. At 27.17 inches long this needs a straight run to sit in and will not tuck into a tent corner. It is rated from -22°F to 104°F, built in Germany, and covered for three years.
Key Features
- 747 CFM: Mixed flow output for an 8 inch duct.
- Sound Insulated Casing: Galvanized steel lined to damp noise off the fan body.
- EC Motor: Draw falls with speed on a 0-10V input.
- Stepless 0-10V Control: Works with the MTP 21 and most climate controllers.
- Motor in the Hub: Kept out of the airstream, so airflow is not disrupted.
- Made in Germany: Built and tested at the Ruck factory.
- 3-Year Warranty: Covered for three years, German built.
Technical Specifications
| Specification | Value |
|---|---|
| Duct Size | 8 in |
| Airflow | 747 CFM |
| Power | 124 W |
| Max Current | 1.6 A |
| Impeller Speed | 3,170 RPM (max) |
| Motor Protection Rating | IP54 |
| Terminal Box Rating | IP44 |
| Complete Unit Rating | IPX4 |
| Weight | 20.3 lbs |
| Dimensions | 27.17 x 12.60 x 13.58 in |
| Operating Temperature | -22 to 104 °F |
| Voltage | 120V, 60 Hz |
| Motor | EC, one-phase |
| Speed Control | Stepless 0-10V (MTP 21 compatible) |
| Thermal Protection | TEC cut-out |
| Insulation Class | F |
| Casing | Sound insulated galvanized sheet steel |
| Impeller | Mixed flow, motor in the hub |
| Warranty | 3 years |
| Origin | Made in Germany |