Digitised from the catalogue curve at standard air (20 °C, 101.3 kPa, 1.2 kg/m³); one curve per voltage / speed grade (1 here, rated 230 V). Data version: catalogue 2026-08. The system resistance curve depends on the actual ductwork — confirm the operating point on site. Need an engineer to verify the duty point? Contact us or add the model to your RFQ and note the duty point.
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 airflow1,231 m³/h725 CFM
- Max static pressure1,030 Pa4.14 in. wg
- Voltage230 V
- Speed2,700 rpm
- Input power170 W
- Noise71 dB(A)
LWDE-250S-MBN-07 EC Metal Inline Duct Fan Ø250 mm
Ø250 mm | EC | Max airflow 1,231 m³/h | Max static pressure 1,030 Pa | 71 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 12-month warranty
- CE · RoHS · ETL on request
PDFDatasheet (PDF)electrical & performance dataPDFFull product catalogueAC&DC&EC AC&DC&EC Metal duct fans · SKU on PDF p. 18
All files for LWDE-250S-MBN-075 files · direct download
PDFFull product catalogue · model on PDF p. 18WEBPDimensional drawingWEBPPerformance curveWEBPWiring diagram
CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center
Proven in: Smart home ERV · Range hoods, ovens & fan coils · Drying, heat treatment & ovens — all case studies on longwellfans.com
Typical applications: Building & agricultural ventilation · Vertical farming — all industries
Engineering files (on request)
CAD files exist for this model and can be released for assembly checks in SolidWorks / CATIA / Creo / Inventor.
CAD models contain the blade geometry and are not downloadable. Tell us the project; an engineer sends the file after a short check, normally within 1 business day.
Downloads for LWDE-250S-MBN-07
PDFDatasheetPDFFull product catalogue · AC&DC&EC AC&DC&EC Metal duct fans · model on PDF p. 18 · 16.4 MBNeed a non-standard size or another format? Ask an engineer or search the download center.
LWDE-250S-MBN-07 is a LONGWELL EC Metal Inline Duct Fan from the Metal Inline Duct Fans range, impeller Ø250 mm, rated 230 V EC, maximum airflow 1,231 m³/h, maximum static pressure 1,030 Pa, noise 71 dB(A), input power 170 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-250S-MBN-07 |
|---|---|
| Series | LWDE250 |
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 230 V |
| Frequency | 50 Hz |
| Current | 1.1 A |
| Input power | 170 W |
| Speed | 2,700 rpm |
| Max. airflow | 1,231 m³/h |
| Max. static pressure | 1,030 Pa |
| Noise | 71 dB(A) |
| Storage temperature | -25 ~ 70℃ |
| Humidity | 0 ~ 85 % RH |
| Altitude | < 1000m |
| Impeller diameter | Ø250 mm |
| Inlet diameter | 250mm |
| Impeller material | PA66+GF ( Impeller ) |
| Protection class | IP55 |
| Insulation class | B |
| Vibration standard | JB/T 8689 |
| Service life | 40,000Hours(L10), At 40 °Croom, humidity 15%~65%RH |
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.
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-250S-MBN-07 this model | 1,231 m³/h | 1,030 Pa | 2,700 rpm | 170 W | 71 dB(A) | 230 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-250 (10")S-MWN-02 | 2,075 m³/h | see curve | 3,000 rpm | 195 W | 69 dB(A) | 220-240 V | View |
| LWDE-250 (10")S-MWN-04 | 2,075 m³/h | see curve | 3,000 rpm | 195 W | 62 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
LWAD3G200MS-7MKB-01Ø200 mm · 1,236 m³/h · 278 Pa · DCsimilar duty
LWAD3G200HS-7MKB-02Ø200 mm · 1,236 m³/h · 278 Pa · DCsimilar duty
LWFD3G146-092DZ-03Ø146 mm · 1,236 m³/h · 525.3 Pa · DCsimilar duty
LWFA4D200-102NT-01Ø200 mm · 1,236 m³/h · 226.6 Pa · ACsimilar duty
LWFA4E200-102NS-02Ø200 mm · 1,236 m³/h · 226.6 Pa · ACsimilar duty
LWBE3G250-072NS-18Ø250 mm · 1,236 m³/h · 515 Pa · ECsimilar dutySee all Impeller Ø160–315 mm · select by duty point