Need a non-standard size or another format? Ask an engineer or search the download center.
Representative image of the series — dimensions and configuration of this model are given in the drawing and data table below.
- ImpellerØ300 mm11.8 in
- Max airflow3,500 m³/h2,060 CFM
- Voltage220-240 V
- Speed3,200 rpm
- Input power352 W
- Noise70 dB(A)
LWDE-300 (12″)S-MWN-04 EC Ultra Silent Metal Duct Fan Ø300 mm
Ø300 mm | EC | Max airflow 3,500 m³/h | 70 dB(A)
- Factory direct
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 12-month warranty
- CE · RoHS · ETL on request
All files for LWDE-300 (12")S-MWN-041 files · direct download
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: Central ventilation units · Building & agricultural ventilation · Vertical farming — all industries
LWDE-300 (12")S-MWN-04 is a LONGWELL EC Ultra Silent Metal Duct Fan from the Ultra Silent Duct Fans range, impeller Ø300 mm, rated 220-240 V EC, maximum airflow 3,500 m³/h, noise 70 dB(A), input power 352 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-300 (12")S-MWN-04 |
|---|---|
| Series | LWDE300 |
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 220-240 V |
| Frequency | 50 Hz |
| Input power | 352 W |
| Speed | 3,200 rpm |
| Max. airflow | 3,500 m³/h |
| Noise | 70 dB(A) |
| Impeller diameter | Ø300 mm |
| Inlet diameter | 300mm |
Typical applications
- Residential and commercial fresh-air systems
- Kitchen and bathroom exhaust
- Local pressurisation and booster duty
- Hotel and office ventilation
Series LWDE300: 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 (Ø300 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-300 (12")S-MWN-04 this model | 3,500 m³/h | see curve | 3,200 rpm | 352 W | 70 dB(A) | 220-240 V | |
| LWDE-300 (12")U-MWN-01 | 1,763 m³/h | see curve | 3,200 rpm | 352 W | 74 dB(A) | 110-120 V | View |
| LWDE-300 (12")U-MWN-03 | 1,763 m³/h | see curve | 3,200 rpm | 352 W | 70 dB(A) | 110-120 V | View |
| LWDE-300 (12")S-MWN-02 | 3,500 m³/h | see curve | 3,200 rpm | 352 W | 74 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 LWDE300 seriesSame impeller, different speed grade or wiring
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWDE-315S-MBN-01Ø315 mm · 1,839 m³/h · 793 Pa · ECadjacent size
LWDA-315(12.6'')S-PWN-05Ø315 mm · 2,500 m³/h · 450 Pa · ACadjacent size
LWDA-315S-MBN-02Ø315 mm · 1,680 m³/h · 593 Pa · ACadjacent size
LWDE-350 (14")U-MWN-01Ø350 mm · 3,467 m³/h · ECadjacent size
LWDE-250 (10")S-MWN-04Ø250 mm · 2,075 m³/h · ECadjacent size
LWDE-250 (10")S-MWN-02Ø250 mm · 2,075 m³/h · ECadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
See all Impeller Ø200–400 mm · select by duty point