- ImpellerØ203 mm8.0 in
- Max airflow2,805 m³/h1,651 CFM
- Max static pressure417 Pa1.67 in. wg
- Voltage220 V
- Speed1,440 rpm
LWDD8-8-EC DD Series EC Direct Drive Centrifugal Blower Ø203 mm
Ø203 mm | EC | Max airflow 2,805 m³/h | Max static pressure 417 Pa
- Direct from LONGWELL
- OEM / ODM
- Samples in 1–3 days
- Production 15–30 days
- 12-month warranty
- CE · RoHS · ETL on request
CAD models (STEP / DWG) are released on request — see “Engineering files” below. Another format or a non-standard variant? Ask an engineer · download center
Performance curve (P-Q) LWDD8-8-EC
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 220 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.
Dimensional drawing LWDD8-8-EC
Files for LWDD8-8-EC: datasheet, catalogue and drawing PDFs are listed above ↑ · CAD (STEP / DWG) on request — ask an engineer.
Technical description LWDD8-8-EC
LWDD8-8-EC is a LONGWELL DD Series EC Direct Drive Centrifugal Blower from the Impeller Ø178–254 mm range, impeller Ø203 mm, rated 220 V EC, maximum airflow 2,805 m³/h, maximum static pressure 417 Pa. 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 | LWDD8-8-EC |
|---|---|
| Motor type | EC |
| Phase | 1-phase |
| Rated voltage | 220 V |
| Frequency | 50 Hz |
| Speed | 1,440 rpm |
| Max. airflow | 2,805 m³/h |
| Max. static pressure | 417 Pa |
| Impeller diameter | Ø203 mm |
| Dimensions | 8-8 |
Typical applications
- Commercial kitchen extraction
- Ventilation units and AHUs
- Process and fume extraction
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).
PDFISO 9001 / 14001 / 45001 management system certificateNeed a Declaration of Conformity for this model and your destination market? Ask us — we arrange additional certification on request.
How to order LWDD8-8-EC
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.
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)
Alternatives with the same impeller (Ø203 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 | |
|---|---|---|---|---|---|---|---|
| LWDD8-8-EC this model | 2,805 m³/h | 417 Pa | 1,440 rpm | — | — | 220 V | |
| LWDD8-7-EC | 2,734 m³/h | 467 Pa | 1,440 rpm | 585 W | — | 220 V | View |
Not sure which one? Send us the duty point (airflow / static pressure / noise limit) — use the selector or ask an engineer.
Adjacent sizesOne size up when airflow is short, one size down when it is too much
LWFA-E-200-01Ø200 mm · 1,000 m³/h · 305 Pa · ACadjacent size
LWFA-E-225-01Ø225 mm · 2,300 m³/h · 325 Pa · ACadjacent size
LWDD7-7-ECØ178 mm · 1,923 m³/h · 321 Pa · ECadjacent size
LWDD7-5-ECØ178 mm · 1,400 m³/h · 304 Pa · ECadjacent size
LWDD9-9-ECØ229 mm · 4,146 m³/h · 587 Pa · ECadjacent size
LWDD9-7-ECØ229 mm · 2,410 m³/h · 486 Pa · ECadjacent sizeAlternatives at a similar dutySimilar airflow, different construction or motor platform
LWBA4E355-102NS-02Ø355 mm · 2,812 m³/h · 515 Pa · ACsimilar duty
LWBA4D355-102NT-06Ø355 mm · 2,812 m³/h · 515 Pa · ACsimilar duty
LWAA4D350S-5MEB-03Ø350 mm · 2,781 m³/h · ACsimilar duty
LWAA4E350S-5MEB-01Ø350 mm · 2,781 m³/h · ACsimilar duty
LWAE3G300SS-5PEW-09Ø300 mm · 2,781 m³/h · 141 Pa · ECsimilar duty
LWBA4E315-138NS-14Ø315 mm · 2,781 m³/h · 515 Pa · ACsimilar dutySee all Commercial Centrifugal Blowers · select by duty point
Go deeper on longwellfans.com
Application guides, project stories and engineering calculators for commercial centrifugal blowers — on our main site.
Solutions
- Commercial HVACAHU, rooftop, fan coil, air curtain
- Home appliance coolingHoods, ovens, dryers, air conditioners