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LWDA-100 (4")U-MWN-03 product photo
  • ImpellerØ100 mm3.9 in
  • Max airflow410 m³/h241 CFM
  • Voltage110-120 V
  • Speed3,350 rpm
  • Input power41 W
  • Noise51 dB(A)

LWDA-100 (4″)U-MWN-03 AC Ultra Silent Metal Duct Fan Ø100 mm

Ø100 mm | AC | Max airflow 410 m³/h | 51 dB(A)

SKU: LWDA-100 (4")U-MWN-03 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-100 (4")U-MWN-031 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-100 (4")U-MWN-03

Powerful & Quiet: The Reliable Choice – Longwell Duct Fan | LWDA-100(4″)S-PWN-14 · open in video library

Longwell AC Plastic Duct Fan, Breathe Fresh Vitality into Your Space | LWDA-100(4)S-PWN-18 · open in video library

Dimensional drawing LWDA-100 (4")U-MWN-03

Dimensional drawingDimensions in mm. Confirm against the final approval drawing before machining cut-outs.
LWDA-100 (4")U-MWN-03 Dimensional drawing

Files for LWDA-100 (4")U-MWN-03: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWDA-100 (4")U-MWN-03

LWDA-100 (4")U-MWN-03 is a LONGWELL AC Ultra Silent Metal Duct Fan from the Ultra Silent Duct Fans range, impeller Ø100 mm, rated 110-120 V AC, maximum airflow 410 m³/h, noise 51 dB(A), input power 41 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.

Technical data

Model LWDA-100 (4")U-MWN-03
Series LWDA100
Motor type AC
Phase 1-phase
Rated voltage 110-120 V
Frequency 60 Hz
Input power 41 W
Speed 3,350 rpm
Max. airflow 410 m³/h
Noise 51 dB(A)
Impeller diameter Ø100 mm
Inlet diameter 100mm

Typical applications

  • Residential and commercial fresh-air systems
  • Kitchen and bathroom exhaust
  • Local pressurisation and booster duty
  • Hotel and office ventilation

Series LWDA100: 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-100 (4")U-MWN-03

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 (Ø100 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-100 (4")U-MWN-03 this model 410 m³/hsee curve 3,350 rpm41 W51 dB(A)110-120 V
LWDA-100(4")S-MWN-08 140 m³/h58 Pa 2,800 rpm20 W48 dB(A)220 V View
LWDA-100(4")U-PWN-17 205 m³/h135 Pa 1,900 rpm34 W24 dB(A)115 V View
LWDA-100(4")S-PWN-15 205 m³/h135 Pa 1,900 rpm25 W24 dB(A)230 V View
LWDA-100S-MBN-14 242 m³/h326 Pa 2,450 rpm60 W59 dB(A)230 V View
LWDA-100S-PWN-15 319 m³/h185 Pa 2,550 rpm40 W25 dB(A)230 V View
LWDA-100(4")U-PWN-16 325 m³/h163 Pa 2,360 rpm34 W30 dB(A)115 V View
LWDA-100(4")S-PWN-14 325 m³/h163 Pa 2,360 rpm36 W30 dB(A)230 V View
LWDA-100 (4")U-PWN-01 410 m³/hsee curve 3,350 rpm41 W52 dB(A)110-120 V View
LWDA-100 (4")S-PWN-02 605 m³/h168 Pa 2,900 rpm41 W51 dB(A)220-240 V View
LWDA-100 (4")S-MWN-04 605 m³/hsee curve 2,900 rpm41 W49 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 LWDA100 seriesSame impeller, different speed grade or wiring

AC Metal Inline Duct Fan — series representative image for LWDA-100S-MBN-14LWDA-100S-MBN-14Ø100 mm · 242 m³/h · 326 Pa · ACsame seriesLWDA-100 (4")S-MWN-04 product photoLWDA-100 (4")S-MWN-04Ø100 mm · 605 m³/h · ACsame seriesLWDA-100 (4")U-PWN-01 product photoLWDA-100 (4")U-PWN-01Ø100 mm · 410 m³/h · ACsame seriesLWDA-100 (4")S-PWN-02 product photoLWDA-100 (4")S-PWN-02Ø100 mm · 605 m³/h · 168 Pa · ACsame seriesLWDA-100(4")S-PWN-14 product photoLWDA-100(4")S-PWN-14Ø100 mm · 325 m³/h · 163 Pa · ACsame seriesLWDA-100(4")S-PWN-15 product photoLWDA-100(4")S-PWN-15Ø100 mm · 205 m³/h · 135 Pa · ACsame series

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

EC Plastic Inline Duct Fan — series representative image for LWDE3G100-IS-01LWDE3G100-IS-01Ø98 mm · 385 m³/h · 269 Pa · ECadjacent sizeEC Plastic Inline Duct Fan — series representative image for LWDE3G100-IS-03LWDE3G100-IS-03Ø98 mm · 385 m³/h · 269 Pa · ECadjacent sizeLWDD-125M-MBN-08 product photoLWDD-125M-MBN-08Ø125 mm · 270 m³/h · 365 Pa · DCadjacent sizeLWDA-125S-PWN-11 product photoLWDA-125S-PWN-11Ø125 mm · 319 m³/h · 185 Pa · ACadjacent sizeLWDA-125 (5")S-PWN-02 product photoLWDA-125 (5")S-PWN-02Ø125 mm · 605 m³/h · 168 Pa · ACadjacent sizeLWDA-125 (5")U-PWN-01 product photoLWDA-125 (5")U-PWN-01Ø125 mm · 410 m³/h · ACadjacent size

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

LWDE-400 (16")S-MWN-04 product photoLWDE-100 (4")U-MWN-03Ø100 mm · 410 m³/h · ECsimilar dutyLWDE-125 (5")S-PWN-02 product photoLWDE-125 (5")U-PWN-01Ø125 mm · 410 m³/h · ECsimilar dutyLWDA-125 (5")U-MWN-03 product photoLWDA-125 (5")U-MWN-03Ø125 mm · 410 m³/h · ACsimilar dutyLWDE-125 (5")S-PWN-02 product photoLWDE-100 (4")U-PWN-01Ø100 mm · 410 m³/h · ECsimilar duty

See all Impeller Ø100–150 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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