What High Output Means on a 14 Inch Duct
HO stands for high output, and here it means 2,819 CFM out of a 14 inch duct. That is some 46 percent more air than the standard Prime EVO EC version manages. Maximum current is 3.4A at 120V. The motor is rated IP20 rather than the IP30 or IP54 used elsewhere in the range, so it prefers a drier mounting position. It is ETL listed and rated down to -13°F.
When a High Output EC Inline Fan Is the Right Call
Reach for the high output version when the duct size is fixed and the standard fan cannot keep up. Long runs, heavy filter banks and rooms with high air-change targets are the real cases. If the ducting can grow instead, the 16 inch moves more air for a similar current and is usually the better call. The lower motor rating is the thing to design around, so keep this one well clear of splash zones and standing damp. Ruck publishes no dB figure here either, which is worth bearing in mind at this kind of airflow. It comes with 0-10V control and three years of warranty.
Key Features
- 2,819 CFM: Peak mixed flow output for a 14 inch duct.
- EC Motor: Draw falls with speed, unlike a dimmed AC motor.
- Stepless 0-10V Control: Works with the MTP 21 and most climate controllers.
- 3D Impeller and Guide Vanes: Blade and vane pairing that holds pressure on long runs.
- IPX4 Plastic Housing: Corrosion-resistant and splash-rated for humid rooms.
- TEC Motor Protection: Thermal cut-out built into the motor windings.
- ETL Listed: Third-party safety certification for commercial installs.
- 3-Year Warranty: German-built, and covered for three years.
Technical Specifications
| Specification | Value |
|---|---|
| Duct Size | 14 in |
| Airflow | 2,819 CFM |
| Max Current | 3.4 A |
| Motor Protection Rating | IP20 |
| Minimum Ambient Temperature | -13 °F |
| Voltage | 120V, 60 Hz |
| Motor | EC, one-phase |
| Speed Control | Stepless 0-10V |
| Thermal Protection | TEC cut-out |
| Insulation Class | F |
| Impeller | 3D shaped, mixed flow with guide vanes |
| Housing | Corrosion-resistant injection moulded plastic, IPX4 |
| Certification | ETL listed |
| Mounting | Bracket included |
| Cord Length | 5.5 ft |
| Warranty | 3 years |
| Origin | Made in Germany |