ImpellerØ146 mm5.7 in
Max airflow752 m³/h442 CFM
Max static pressure567 Pa2.28 in. wg
Voltage230 V
Speed2,400 rpm
Input power115 W
Noise66 dB(A)

LWFE3G146-072DS-04 EC Dual Inlet Forward Centrifugal Blower Ø146 mm

Ø146 mm | EC | Max airflow 752 m³/h | Max static pressure 567 Pa | 66 dB(A)

SKU: LWFE3G146-072DS-04 Categories: Centrifugal Fans, Dual Inlet Forward Curved Blowers, Impeller Ø120–146 mm

Direct from LONGWELL
OEM / ODM
Samples in 1–3 days
Production 15–30 days
12-month warranty
CE · ETL · RoHS

PDFDatasheet (PDF)electrical & performance dataPDFFull product catalogueEC EC Dual Inlet Forward Centrifugal Blower · SKU on PDF p. 16

All files for LWFE3G146-072DS-046 files · direct download

PDFFull product catalogue · model on PDF p. 16 WEBPDimensional drawing WEBPPerformance curve WEBPWiring diagram PDFDrawing

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

Cross-reference: same impeller size class as ebm-papst D2E146 — side-by-side comparison on longwellfans.com. Mounting is confirmed against the LONGWELL drawing before ordering.

Used in

Range hoods Air heaters Fan coil units Appliances All industries →

Proven in projects

AHU & ventilation unit fans CRAH FanGrid retrofit Heat pump fan programme All case studies →

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 publicly downloadable. Tell us the project; an engineer sends the file after a short check, normally within 1 business day.

Get a quote · LWFE3G146-072DS-04

Price, curve check and lead time within 1 business day.

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WhatsApp / Phone+86 183 5827 4663 E-mail an engineersales@longwellfans.com Files for LWFE3G146-072DS-04datasheet · catalogue · drawings · curves — listed above

Samples 1–3 days · fee credited to your order
Typically 50–200 pcs · ~30 pcs for a first validation order
T/T 30 / 70 · FOB / CIF / DDP
Released to LONGWELL standards · 12-month warranty
How ordering works →

Performance curve (P-Q) LWFE3G146-072DS-04

Required airflow Required static pressure

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 curve re-digitised 2026-09-20 (axis-calibrated, cross-checked). 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.

Video LWFE3G146-072DS-04

LONGWELL 146mm EC Dual Inlet Centrifugal Blower Fan | LWFE3G146 · open in video library

Intelligent Wind Power, High Efficiency—Longwell EC Forward-Curved Centrifugal Fan | LWFE3G146-092DS-09 · open in video library

Drawing, Curve & Wiring LWFE3G146-072DS-04

LWFE3G146-072DS-04 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWFE3G146-072DS-04 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

LWFE3G146-072DS-04 Wiring diagram — **Wiring diagram**Lead colours and terminal assignment; TK = motor thermal contact.

Files for LWFE3G146-072DS-04: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWFE3G146-072DS-04

LWFE3G146-072DS-04 is a LONGWELL EC Dual Inlet Forward Centrifugal Blower from the Dual Inlet Forward Curved Blowers range, impeller Ø146 mm, rated 230 V EC, maximum airflow 752 m³/h, maximum static pressure 567 Pa, noise 66 dB(A), input power 115 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	LWFE3G146-072DS-04
Series	LWFE3G146
Motor type	EC
Phase	1-phase
Rated voltage	230 V
Frequency	50 Hz
Current	0.85 A
Input power	115 W
Speed	2,400 rpm
Max. airflow	752 m³/h
Max. airflow (CFM)	442 CFM
Max. static pressure	567 Pa
Noise	66 dB(A)
Ambient temperature	-25 ~ 60 °C
Storage temperature	-25 ~ 70℃
Humidity	0 ~ 85 % RH
Altitude	< 1000m
Impeller diameter	Ø146 mm
Rotor diameter	72 mm
Impeller material	Plastic ( Impeller )
Protection class	IP55
Insulation class	B
Bearing	Maintenance-free deep groove ball bearings
Duty	S1
Balance grade	G6.3
Vibration standard	JB/T 8689
Service life	40,000Hours(L10), At 40 °Croom, humidity 15%~65%RH

Typical applications

Air handling units (AHU) and rooftop units (RTU)
Data-center CRAH / CRAC units and fan walls
Dust extraction and process ventilation
Fan filter units and air purifiers

Series LWFE3G146: 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.

Product-line certificates

Scans of original documents held by Ningbo Longwell Electric Technology Co., Ltd.: the company ISO management-system certificate and the certificates whose model list covers this model. 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 certificate

PDFISO 9001 / 14001 / 45001 management system certificate

ETLIntertek Authorization to Mark, control no. 5022563; the covered model ranges are stated on the document.

ETL Authorization to Mark · report 220400508HAN-001 · LWBE3G / LWDE3G / LWFE3G — LONGWELL certificate

PDFETL Authorization to Mark · report 220400508HAN-001 · LWBE3G / LWDE3G / LWFE3G

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

How to order LWFE3G146-072DS-04

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

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

Test labs and all certificate scans →

Alternatives with the same impeller (Ø146 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
LWFE3G146-072DS-04 this model	752 m³/h	567 Pa	2,400 rpm	115 W	66 dB(A)	230 V
LWFE3G146-092DS-02	855 m³/h	536 Pa	1,300 rpm	80 W	59 dB(A)	230 V	View
LWFE3G146-072DS-01	989 m³/h	474 Pa	1,350 rpm	120 W	72 dB(A)	230 V	View
LWFE3G146-092DS-03	1,009 m³/h	670 Pa	1,450 rpm	115 W	61 dB(A)	230 V	View
LWFE3G146-092DS-05	1,133 m³/h	876 Pa	3,200 rpm	220 W	74 dB(A)	230 V	View