Fresh Air Systems
ST Silent Inline Mixed-Flow Booster Fan
| Product | ST Silent Inline Mixed-Flow Booster Fan | ||
| Category | Fresh Air Systems | ||
| Description | The ST series silent inline booster fan uses high-quality imported ball bearings and motors with overload protection. All models feature a two-speed motor for more flexible use. Optimized air collectors, distributors and deflectors greatly improve airflow effect, achieving high wind pressure while ensuring low noise. Featuring a world-first buckle-link structure, the full product line is manufactured to high technical specifications for quick and easy installation — all procedures take only minutes, saving time and money. Models range from ST-75 to ST-315, with airflow of 220–2900 m³/h and static pressure of 150–630 Pa. It suits ventilation systems needing duct boosting, especially quiet upgrades of existing ductwork. Customization and OEM/ODM are supported. | ||
| ST-75 | 35 | 220 | 150 |
| ST-100 | 35 | 220 | 150 |
| ST-125 | 40 | 310 | 180 |
| ST-150 | 40 | 310 | 180 |
| ST-200 | 75 | 540 | 300 |
| ST-250 | 130 | 900 | 380 |
| ST-300 | 225 | 1450 | 488 |
| ST-315 | 320 | 2900 | 630 |
Key Features
- Silent operation: optimized airflow channels, low noise and high pressure
- Two-speed motor: two speed options for flexible use
- Imported bearings: high-quality ball bearings, long life and stable operation
- Overload protection: built-in motor protection for safety
- Quick install: buckle-link structure, minutes to install and maintain
- Full range: ST-75 to ST-315, airflow up to 2900 m³/h
Applications
- Boosting airflow in existing ventilation ducts
- Quiet ducted supply for residential and commercial spaces
- Pressure compensation in long-distance duct runs
- Duct ventilation systems requiring low-noise operation
FAQ
Q1: Is it a two-speed motor?
Yes, all models feature a two-speed motor for flexible speed selection.
Q2: Is installation easy?
Very. The buckle-link structure completes installation, removal and maintenance in minutes.
Q3: How noisy is it?
The whole series is silent-design, 31–69 dB(A) depending on model — ideal for noise-sensitive places.
Q4: Can it be connected into existing ducts?
Yes, the ST series is designed for in-line duct boosting with simple, quick installation.
Technical Specifications
| Model | Power (W) | Airflow (m³/h) | Static Pressure (Pa) |
|---|---|---|---|
| ST-75 | 35 | 220 | 150 |
| ST-200 | 225 | 900 | 300 |
| ST-100 | 35 | 220 | 150 |
| ST-125 | 40 | 310 | 180 |
| ST-150 | 40 | 310 | 180 |
| ST-250 | 130 | 900 | 380 |
| ST-300 | 225 | 1450 | 488 |
| ST-315 | 320 | 2900 | 630 |
* Parameters are for reference only; the actual product prevails. Custom specifications are available on request.
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Zhejiang Jiayi Fan Co., Ltd. — professional ventilation and air compressor manufacturer since 2003, exporting to 50+ countries. Send us your requirement for a full catalog and quotation.