Fresh Air Systems
CDR Series External Rotor Round Inline Duct Fan
| Product | CDR Series External Rotor Round Inline Duct Fan |
| Category | Fresh Air Systems |
| Description | The CDR series external rotor centrifugal duct fan consists of an external rotor single-phase capacitor-run asynchronous motor, volute casing, impeller and mounting bracket. The inlet and outlet share the same diameter as the round duct and are coaxially aligned, allowing direct in-line installation without reducers — significantly cutting duct design and installation costs. With the impeller mounted directly on the motor outer rotor, the unit is compact in axial length and structure. It delivers large airflow, high static pressure, low vibration and low noise. Every unit is dynamically balanced and performance-tested before shipment for reliable long-term operation. Available in 220/240V, 50/60Hz. Airflow 250–1200 m³/h, static pressure up to 830 Pa, noise as low as 47 dB(A). Ideal for hotels, clubs, hospitals, libraries and any low-noise forced ventilation application. |
Key Features
- External rotor design: impeller mounted directly on the motor rotor for short axial length and compact size
- Coaxial inlet/outlet: same diameter as the duct for direct in-line installation, no reducer needed
- High airflow & pressure: up to 1200 m³/h airflow and 830 Pa static pressure
- Low noise: optimized impeller and volute aerodynamics, down to 47 dB(A)
- Low vibration, long life: strictly balanced impeller with high-quality bearings
- OEM/ODM available: custom voltage, frequency and airflow on request
Applications
- Hotels, clubs, hospitals and libraries where quiet operation matters
- Offices, shops and restaurants — ducted supply and exhaust
- Home ventilation, kitchen and bathroom duct exhaust
- Equipment rooms, storerooms and small-space ventilation
FAQ
Q1: Can the CDR fan be installed directly into my existing duct?
Yes. The inlet and outlet match standard round duct diameters and are coaxially aligned — connect directly with flanges or clamps, no reducer required.
Q2: How noisy is it?
47–60 dB(A) depending on model and speed. Smaller sizes are especially quiet, ideal for hotels and hospitals.
Q3: Can you customize voltage and frequency?
Yes. Standard is 220/240V, 50/60Hz. We customize for destination countries and support OEM/ODM.
Q4: What is the lead time?
Stock models 7–15 days; custom models usually 25–35 days, subject to order confirmation.
Technical Specifications
| Model | Power (W) | Airflow (m³/h) | Static Pressure (Pa) | Noise dB(A) |
|---|---|---|---|---|
| CDR2E-100 | 75 | 250 | 350 | 47 |
| CDR2E-200 | 180 | 800 | 550 | 53 |
| CDR2E-315 | 270 | 1200 | 830 | 60 |
| CDR2E-125 | 80 | 275 | 390 | 47 |
| CDR2E-150 | 140 | 370 | 400 | 52 |
| CDR2E-160 | 145 | 590 | 420 | 52 |
| CDR2E-250 | 190 | 850 | 570 | 55 |
* Parameters are for reference only; the actual product prevails. Custom specifications are available on request.
Get the Full Catalog & a Quote
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.