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LWDA-250 (10")S-MWN-04 product photo
  • ImpellerØ250 mm9.8 in
  • Max airflow1,900 m³/h1,118 CFM
  • Voltage220-240 V
  • Speed2,750 rpm
  • Input power162 W
  • Noise60 dB(A)

LWDA-250 (10″)S-MWN-04 AC Ultra Silent Metal Duct Fan Ø250 mm

Ø250 mm | AC | Max airflow 1,900 m³/h | 60 dB(A)

SKU: LWDA-250 (10")S-MWN-04 Categories: , ,
  • Direct from LONGWELL
  • OEM / ODM
  • Samples in 1–3 days
  • Production 15–30 days
  • 12-month warranty
  • CE · RoHS · ETL on request
PDFRequest datasheetsent by an engineer within 1 business day
All files for LWDA-250 (10")S-MWN-041 files · direct download
WEBPDimensional drawing

CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center

Used in
Central ventilation unitsBuilding & agricultural ventilationVertical farmingAll industries →
Proven in projects
Smart home ERVRange hoods, ovens & fan coilsDrying, heat treatment & ovensAll case studies →
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Video LWDA-250 (10")S-MWN-04

LWDA-250 Fan Test | LWDA-250(10″)S-MWN-06 · open in video library

Dimensional drawing LWDA-250 (10")S-MWN-04

Dimensional drawingDimensions in mm. Confirm against the final approval drawing before machining cut-outs.
LWDA-250 (10")S-MWN-04 Dimensional drawing

Files for LWDA-250 (10")S-MWN-04: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWDA-250 (10")S-MWN-04

LWDA-250 (10")S-MWN-04 is a LONGWELL AC Ultra Silent Metal Duct Fan from the Ultra Silent Duct Fans range, impeller Ø250 mm, rated 220-240 V AC, maximum airflow 1,900 m³/h, noise 60 dB(A), input power 162 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.

Technical data

Model LWDA-250 (10")S-MWN-04
Series LWDA250
Motor type AC
Phase 1-phase
Rated voltage 220-240 V
Frequency 50 Hz
Input power 162 W
Speed 2,750 rpm
Max. airflow 1,900 m³/h
Noise 60 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 LWDA250: 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).

ISO 9001 / 14001 / 45001 management system certificate — LONGWELL certificatePDFISO 9001 / 14001 / 45001 management system certificate

Need a Declaration of Conformity for this model and your destination market? Ask us — we arrange additional certification on request.

How to order LWDA-250 (10")S-MWN-04

Most first orders follow the same eight steps. Quantities, terms and lead times are confirmed in your quotation.

  1. 1SelectFind models by duty point in the selector or by model number, compare on the curve and add them to your RFQ list.
  2. 2Engineering checkWithin 1 business day you receive the duty-point check on the curve, price and lead time.
  3. 3SamplesStock models ship in 1–3 days.
  4. 4Validation supportDatasheets, drawings, wiring diagrams and DoC per model; test reports, CAD and register maps after a short project check or NDA.
  5. 5Order & paymentProforma invoice; first orders on T/T 30 / 70.
  6. 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.
  7. 7ShippingFOB / CIF / DDP by sea from Ningbo or Shanghai; express and air on EXW / FCA / DAP.
  8. 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.

See terms, QC and FAQ →

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)
LONGWELL Semi-anechoic chamber
Semi-anechoic chamber
LONGWELL Semi-anechoic chamber
Semi-anechoic chamber
LONGWELL Test laboratory
Test laboratory
LONGWELL Test laboratory
Test laboratory
LONGWELL Burn-in test
Burn-in test
LONGWELL Burn-in test
Burn-in test
LONGWELL Inspection
Inspection
LONGWELL Warehouse
Warehouse

Test labs and all certificate scans →

Alternatives with the same impeller (Ø250 mm · AC)

Same impeller, different speed grade, power or wiring. Step up for more airflow, step down for lower noise.

ModelMax airflowMax static pressureSpeedPowerNoiseVoltage
LWDA-250 (10")S-MWN-04 this model 1,900 m³/hsee curve 2,750 rpm162 W60 dB(A)220-240 V
LWDA-250S-MBN-10 1,034 m³/h515 Pa 2,615 rpm165 W71 dB(A)230 V View
LWDA-250 (10")U-MWN-01 1,219 m³/hsee curve 3,000 rpm228 W69 dB(A)110-120 V View
LWDA-250 (10")U-MWN-03 1,219 m³/hsee curve 3,000 rpm228 W62 dB(A)110-120 V View
LWDA-250(8'')S-PWN-05 1,600 m³/h420 Pa 2,500 rpm175 W50 dB(A)230 V View
LWDA-250 (10")S-MWN-02 1,900 m³/hsee curve 2,750 rpm162 W68 dB(A)220-240 V View
LWDA-250(10")S-MWN-06 2,100 m³/h215 Pa 2,800 rpm100 W65 dB(A)220 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 LWDA250 seriesSame impeller, different speed grade or wiring

LWDA-250S-MBN-10 product photoLWDA-250S-MBN-10Ø250 mm · 1,034 m³/h · 515 Pa · ACsame seriesLWDA-250 (10")U-MWN-03 product photoLWDA-250 (10")U-MWN-03Ø250 mm · 1,219 m³/h · ACsame seriesLWDA-250 (10")U-MWN-01 product photoLWDA-250 (10")U-MWN-01Ø250 mm · 1,219 m³/h · ACsame seriesLWDA-250 (10")S-MWN-02 product photoLWDA-250 (10")S-MWN-02Ø250 mm · 1,900 m³/h · ACsame seriesLWDA-250(8'')S-PWN-05 product photoLWDA-250(8'')S-PWN-05Ø250 mm · 1,600 m³/h · 420 Pa · ACsame seriesLWDA series product photo (series image)LWDA-250(10")S-MWN-06Ø250 mm · 2,100 m³/h · 215 Pa · ACsame series

Adjacent sizesOne size up when airflow is short, one size down when it is too much

LWDE-400 (16")S-MWN-04 product photoLWDE-200 (8")S-MWN-04Ø200 mm · 1,310 m³/h · ECadjacent sizeLWDE series product photo (series image)LWDE-200 (8")S-MWN-02Ø200 mm · 1,310 m³/h · ECadjacent sizeLWDE-300 (12")S-MWN-02 product photoLWDE-300 (12")U-MWN-01Ø300 mm · 1,763 m³/h · ECadjacent sizeLWDE-300 (12")S-MWN-02 product photoLWDE-300 (12")S-MWN-02Ø300 mm · 3,500 m³/h · ECadjacent sizeLWDA-200(8")S-PWN-09 product photoLWDA-200(8")S-PWN-09Ø200 mm · 910 m³/h · 384 Pa · ACadjacent sizeLWDA-300 (12")S-MWN-04 product photoLWDA-300 (12")S-MWN-04Ø300 mm · 3,150 m³/h · ACadjacent size

Alternatives at a similar dutySimilar airflow, different construction or motor platform

LWCD-120780MN-06 product photoLWCD-120780MN-06Ø120 mm · 1,900 m³/h · 140 Pa · DCsimilar dutyLWCE-120780SN-06 product photoLWCE-120780SN-06Ø120 mm · 1,900 m³/h · 141 Pa · ECsimilar dutyLWDA-300 (12")U-MWN-03 product photoLWDA-300 (12")U-MWN-03Ø300 mm · 1,900 m³/h · ACsimilar dutyLWDA-300 (12")U-MWN-01 product photoLWDA-300 (12")U-MWN-01Ø300 mm · 1,900 m³/h · ACsimilar dutyLWAE3G300SS-5PEW-12 product photoLWAE3G300SS-5PEW-12Ø300 mm · 1,906 m³/h · 118 Pa · ECsimilar duty

See all Impeller Ø200–400 mm  ·  select by duty point

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Ningbo Longwell Electric Technology Co., Ltd. · No. 100 Henan Road, Ditang, Yuyao, Ningbo, Chinasales@longwellfans.com · WhatsApp +86 183 5827 4663 · Mon–Fri 8:30–17:30 (UTC+8), reply within 1 business dayHow to order · Privacy notice
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