Representative image of the series — dimensions and configuration of this model are given in the drawing and data table below.
- ImpellerØ250 mm9.8 in
- Max airflow2,075 m³/h1,221 CFM
- Voltage220-240 V
- Speed3,000 rpm
- Input power195 W
- Noise62 dB(A)
LWDE-250 (10″)S-MWN-04 EC Ultra Silent Metal Duct Fan Ø250 mm
Ø250 mm | EC | Max airflow 2,075 m³/h | 62 dB(A)
- Direct from LONGWELL
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 12-month warranty
- CE · RoHS · ETL on request
CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center
Dimensional drawing LWDE-250 (10")S-MWN-04
Files for LWDE-250 (10")S-MWN-04: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.
Technical description LWDE-250 (10")S-MWN-04
LWDE-250 (10")S-MWN-04 is a LONGWELL EC Ultra Silent Metal Duct Fan from the Ultra Silent Duct Fans range, impeller Ø250 mm, rated 220-240 V EC, maximum airflow 2,075 m³/h, noise 62 dB(A), input power 195 W. The EC motor integrates the drive electronics: stepless speed control by 0–10 V or PWM signal, speed feedback and high efficiency at part load.
Technical data
| Model | LWDE-250 (10")S-MWN-04 |
|---|---|
| Series | LWDE250 |
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 220-240 V |
| Frequency | 50 Hz |
| Input power | 195 W |
| Speed | 3,000 rpm |
| Max. airflow | 2,075 m³/h |
| Noise | 62 dB(A) |
| Impeller diameter | Ø250 mm |
| Inlet diameter | 250mm |
Typical applications
- Residential and commercial fresh-air systems
- Kitchen and bathroom exhaust
- Local pressurisation and booster duty
- Hotel and office ventilation
Series LWDE250: models in the same series share the impeller and motor platform and differ in speed grade, voltage or lead-out / terminal-box configuration — compare them in the table below or ask for the best fit at your duty point.
Nameplate values: maximum airflow is measured at zero static pressure and maximum static pressure at zero airflow; the two never occur together. Confirm the operating point on the performance curve. Final selection is subject to the duty point (airflow / static pressure / voltage / control mode) and project verification.
Company certificates
Scans of original documents held by Ningbo Longwell Electric Technology Co., Ltd.: the company ISO 9001 / 14001 / 45001 management-system certificate. Click a scan to open the original.
ISO 9001 / 14001 / 45001Management systems of Ningbo Longwell Electric Technology Co., Ltd. (company certificate).
PDFISO 9001 / 14001 / 45001 management system certificateNeed a Declaration of Conformity for this model and your destination market? Ask us — we arrange additional certification on request.
How to order LWDE-250 (10")S-MWN-04
Most first orders follow the same eight steps. Quantities, terms and lead times are confirmed in your quotation.
- 1SelectFind models by duty point in the selector or by model number, compare on the curve and add them to your RFQ list.
- 2Engineering checkWithin 1 business day you receive the duty-point check on the curve, price and lead time.
- 3SamplesStock models ship in 1–3 days.
- 4Validation supportDatasheets, drawings, wiring diagrams and DoC per model; test reports, CAD and register maps after a short project check or NDA.
- 5Order & paymentProforma invoice; first orders on T/T 30 / 70.
- 6Production & release15–30 days at the partner factory that builds your model, then inspected and released to LONGWELL standards with outgoing sampling to AQL 2.5.
- 7ShippingFOB / CIF / DDP by sea from Ningbo or Shanghai; express and air on EXW / FCA / DAP.
- 8After-sales12 months standard, extendable to 18–24 months by project agreement; test records retained for 5 years; 8D closed-loop for any issue; annual technical review for framework customers.
Test & release at LONGWELL
Specified and drawn by LONGWELL; built to LONGWELL drawings by qualified partner factories; inspected and released to LONGWELL standards before shipment.
See test and release photos (8)
Alternatives with the same impeller (Ø250 mm · EC)
Same impeller, different speed grade, power or wiring. Step up for more airflow, step down for lower noise.
| Model | Max airflow | Max static pressure | Speed | Power | Noise | Voltage | |
|---|---|---|---|---|---|---|---|
| LWDE-250 (10")S-MWN-04 this model | 2,075 m³/h | see curve | 3,000 rpm | 195 W | 62 dB(A) | 220-240 V | |
| LWDE-250 (10")U-MWN-01 | 1,219 m³/h | see curve | 3,000 rpm | 195 W | 69 dB(A) | 110-120 V | View |
| LWDE-250 (10")U-MWN-03 | 1,219 m³/h | see curve | 3,000 rpm | 195 W | 62 dB(A) | 110-120 V | View |
| LWDE-250S-MBN-07 | 1,231 m³/h | 1,030 Pa | 2,700 rpm | 170 W | 71 dB(A) | 230 V | View |
| LWDE-250 (10")S-MWN-02 | 2,075 m³/h | see curve | 3,000 rpm | 195 W | 69 dB(A) | 220-240 V | View |
Not sure which one? Send us the duty point (airflow / static pressure / noise limit) — use the selector or ask an engineer.
Other models in the LWDE250 seriesSame impeller, different speed grade or wiring
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWDE-200 (8")S-MWN-04Ø200 mm · 1,310 m³/h · ECadjacent size
LWDE-200 (8")S-MWN-02Ø200 mm · 1,310 m³/h · ECadjacent size
LWDE-300 (12")U-MWN-01Ø300 mm · 1,763 m³/h · ECadjacent sizeLWDE-300 (12")S-MWN-02Ø300 mm · 3,500 m³/h · ECadjacent size
LWDA-200(8")S-PWN-09Ø200 mm · 910 m³/h · 384 Pa · ACadjacent size
LWDA-300 (12")S-MWN-04Ø300 mm · 3,150 m³/h · ACadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
See all Impeller Ø200–400 mm · select by duty point
Go deeper on longwellfans.com
Application guides, project stories and engineering calculators for inline duct fans — on our main site.
Solutions
- Residential ventilationERV / HRV, bathroom and duct fans
- Commercial HVACAHU, rooftop, fan coil, air curtain