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.
- ImpellerØ400 mm15.7 in
- Max airflow6,850 m³/h4,032 CFM
- Voltage220-240 V
- Speed2,800 rpm
- Input power1,200 W1.61 hp
- Noise70 dB(A)
LWDE-400 (16″)S-MWN-04 EC Ultra Silent Metal Duct Fan Ø400 mm
Ø400 mm | EC | Max airflow 6,850 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-400 (16")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-400 (16")S-MWN-04 is a LONGWELL EC Ultra Silent Metal Duct Fan from the Ultra Silent Duct Fans range, impeller Ø400 mm, rated 220-240 V EC, maximum airflow 6,850 m³/h, noise 70 dB(A), input power 1,200 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-400 (16")S-MWN-04 |
|---|---|
| Series | LWDE400 |
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 220-240 V |
| Frequency | 50 Hz |
| Input power | 1,200 W |
| Speed | 2,800 rpm |
| Max. airflow | 6,850 m³/h |
| Noise | 70 dB(A) |
| Impeller diameter | Ø400 mm |
| Inlet diameter | 400mm |
Typical applications
- Residential and commercial fresh-air systems
- Kitchen and bathroom exhaust
- Local pressurisation and booster duty
- Hotel and office ventilation
Series LWDE400: 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 (Ø400 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-400 (16")S-MWN-04 this model | 6,850 m³/h | see curve | 2,800 rpm | 1,200 W | 70 dB(A) | 220-240 V | |
| LWDE-400 (16")U-MWN-01 | 4,032 m³/h | see curve | 2,800 rpm | 1,200 W | 81 dB(A) | 110-120 V | View |
| LWDE-400 (16")U-MWN-03 | 4,032 m³/h | see curve | 2,800 rpm | 1,200 W | 70 dB(A) | 110-120 V | View |
| LWDE-400 (16")S-MWN-02 | 6,850 m³/h | see curve | 2,800 rpm | 1,200 W | 81 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 LWDE400 seriesSame impeller, different speed grade or wiring
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWDE-355 (14")U-MWN-03Ø355 mm · 3,467 m³/h · ECadjacent size
LWDA-355 (14")S-MWN-04Ø355 mm · 6,450 m³/h · ACadjacent sizeLWDE-355 (14")S-MWN-04Ø355 mm · 6,200 m³/h · ECadjacent size
LWDA-355 (14")U-MWN-03Ø355 mm · 2,130 m³/h · ACadjacent size
LWDE-350 (14")S-MWN-02Ø350 mm · 6,200 m³/h · ECadjacent sizeLWDE-350 (14")U-MWN-01Ø350 mm · 3,467 m³/h · ECadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWAA4E500B-5MKB-12Ø500 mm · 6,850 m³/h · ACsimilar duty
LWA-500S(T)M-03EØ490 mm · 6,800 m³/h · 185 Pa · ACsimilar dutyLWWAF-5A-0.37-4P-1-0026,920 m³/h · ACsimilar duty
LWBE3G355-188NT-29Ø355 mm · 6,756 m³/h · 2,523.5 Pa · ECsimilar duty
LWBE3G355-188PT-26Ø355 mm · 6,756 m³/h · 2,524 Pa · ECsimilar dutySee all Impeller Ø200–400 mm · select by duty point