Representative image of the series — dimensions and configuration of this model are given in the drawing and data table below.

ImpellerØ225 mm8.9 in
Max airflow1,442 m³/h849 CFM
Max static pressure288.4 Pa1.16 in. wg
Voltage380 V
Speed1,390 rpm
Input power400 W
Noise73 dB(A)

LWFA4D225-138ST-02 AC Single Inlet Forward Centrifugal Blower Ø225 mm

Ø225 mm | AC | Max airflow 1,442 m³/h | Max static pressure 288.4 Pa | 73 dB(A)

SKU: LWFA4D225-138ST-02 Categories: Centrifugal Fans, Impeller Ø160–315 mm, Single Inlet Forward Curved Blowers

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

PDFDatasheet (PDF)electrical & performance dataPDFFull product catalogueAC AC Single Inlet Forward Centrifugal Blower · SKU on PDF p. 13

All files for LWFA4D225-138ST-025 files · direct download

PDFFull product catalogue · model on PDF p. 13 WEBPDimensional drawing WEBPPerformance curve PDFSeries catalogue

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

Solid-fuel heating Commercial dishwashers Commercial dryers Fan burners All industries →

Proven in projects

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

Get a quote · LWFA4D225-138ST-02

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 LWFA4D225-138ST-02datasheet · 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) LWFA4D225-138ST-02

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 380 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.

Drawing & Curve LWFA4D225-138ST-02

LWFA4D225-138ST-02 Dimensional drawing — **Dimensional drawing**Dimensions in mm. Confirm against the final approval drawing before machining cut-outs.

LWFA4D225-138ST-02 Performance curve (P-Q) — **Performance curve (P-Q)**Static pressure vs. airflow. Curve numbers correspond to supply voltage / speed grades.

Files for LWFA4D225-138ST-02: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.

Technical description LWFA4D225-138ST-02

LWFA4D225-138ST-02 is a LONGWELL AC Single Inlet Forward Centrifugal Blower from the Single Inlet Forward Curved Blowers range, impeller Ø225 mm, rated 380 V AC, maximum airflow 1,442 m³/h, maximum static pressure 288.4 Pa, noise 73 dB(A), input power 400 W. The fixed-speed AC external-rotor motor is simple, robust and cost-effective for constant-duty applications.

Technical data

Model	LWFA4D225-138ST-02
Series	LWFA4D225
Motor type	AC
Phase	3-phase
Rated voltage	380 V
Frequency	50 Hz
Current	0.9 A
Input power	400 W
Speed	1,390 rpm
Max. airflow	1,442 m³/h
Max. static pressure	288.4 Pa
Noise	73 dB(A)
Ambient temperature	-30 ~ 60 °C
Impeller diameter	Ø225 mm
Rotor diameter	138 mm
Impeller material	Galvanised sheet steel
Insulation class	F
Bearing	Maintenance-free ball bearings
Duty	S1

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 LWFA4D225: 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 certificate

PDFISO 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 LWFA4D225-138ST-02

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 (Ø225 mm · AC)

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
LWFA4D225-138ST-02 this model	1,442 m³/h	288.4 Pa	1,390 rpm	400 W	73 dB(A)	380 V
LWBA2D225-092NT-03	618 m³/h	165 Pa	1,420 rpm	45 W	54 dB(A)	380 V	View
LWBA4D225-092NT-04	690 m³/h	216 Pa	1,650 rpm	47 W	60 dB(A)	380 V	View
LWBA2E225-092NS-13	1,133 m³/h	546 Pa	2,630 rpm	125 W	74 dB(A)	230 V	View
LWBA2D225-092NT-11	1,133 m³/h	546 Pa	2,600 rpm	135 W	74 dB(A)	380 V	View
LWBA2E225-092NS-09	1,133 m³/h	546 Pa	2,600 rpm	135 W	74 dB(A)	230 V	View
LWBA2D225-092NT-08	1,139 m³/h	588 Pa	2,645 rpm	119 W	68.6 dB(A)	380 V	View
LWBA2E225-092NS-06	1,166 m³/h	578 Pa	2,655 rpm	129 W	68.6 dB(A)	230 V	View
LWBA2D225-092NT-12	1,257 m³/h	695 Pa	2,900 rpm	180 W	76 dB(A)	380 V	View
LWBA2E225-092NS-10	1,257 m³/h	695 Pa	2,900 rpm	180 W	76 dB(A)	230 V	View
LWBA2E225-092NU-05	1,276 m³/h	756 Pa	2,905 rpm	178 W	71.3 dB(A)	115 V	View
LWBA2D225-092NT-07	1,318 m³/h	788 Pa	3,095 rpm	190 W	71.8 dB(A)	380 V	View
LWFA6D225-138NT-03	1,339 m³/h	236.9 Pa	930 rpm	300 W	59 dB(A)	380 V	View
LWFA4D225-138NT-01	1,648 m³/h	288.4 Pa	1,300 rpm	490 W	65 dB(A)	380 V	View
LWFA4E225-138NS-02	1,761 m³/h	288.4 Pa	1,320 rpm	510 W	65 dB(A)	230 V	View