Select the right fan by duty point — from 2,600 LONGWELL models

Enter airflow and static pressure and get every model whose measured P-Q curve covers your operating point, ranked by pressure margin. Then download the drawing, curve and datasheet, and send an RFQ straight to the factory.

Measured wind-tunnel curvesDrawings, curves & datasheets per modelFactory RFQ, reply within 1 business dayISO 9001 · ETL · CE · RoHS

Know your airflow and static pressure? Get matching models instantly from 2,397 fans.

Every model with a measured P-Q curve is checked at your duty point: is the point under the curve, and how much static pressure margin remains? The ideal margin is 10–25% — too little and a dirty filter stalls the fan; too much and the fan runs off its efficient range.

16 models meet 20,000 m³/h @ 30 Pa (11,772 CFM @ 0.12 in. wg) 6 with a curve in the library · 10 estimated from nameplate data Air power at this point 167 WQ × Δp — no fan can draw less than this

LWBE3G630-188NT-09LWBE3G630-188PT-04LWBE3G630-188PT-02LWAE3G900TS-5PKW-02LWAE3G900TS-5MGW-01LWAE3G800TS-5PKW-03solid = wind-tunnel measured · dashed = digitised catalogue curve

Model	Match	Speed grade	Pressure at pointPa	Margin	Max airflowm³/h	PowerW · nameplate	NoisedB(A)	VoltageV	Sizemm	Data	Actions
LWBE3G630-188NT-09EC	36.5	1,620 rpm5 grades · 1 in reserve	148.3	394%	21,742	5,600	75	400	630	Digitised	Curve Datasheet
LWBE3G630-188PT-04EC	35	Grade 1Single grade	305.7	919%	21,742	5,600	n/a	400	630	Digitised	Curve Datasheet
LWBE3G630-188PT-02EC	35	10 VHighest grade, no reserve	138.8	363%	21,100	2,955	n/a	400	630	Digitised	Curve Datasheet
LWAE3G900TS-5PKW-02EC	35	Grade 1Single grade	149.2	397%	32,192	1,645	76	380/400	900	Digitised	Curve Datasheet
LWAE3G900TS-5MGW-01EC	35	10 VSingle grade	146.3	388%	32,313	2,785	85	380	900	Digitised	Curve Datasheet
LWAE3G800TS-5PKW-03EC	35	Grade 1Single grade	120.7	302%	24,892	1,589	78	380/400	800	Digitised	Curve Datasheet
LWEA800TM-170EAC	60.3	Nameplatecurve on request	39.8≈	33%	24,739	2,200	n/a	380	800	Estimated
LWAE3G800TS-3MKW-02EC	35.9	Nameplatecurve on request	52≈	73%	26,590	1,270	n/a	380	800	Estimated	Curve Datasheet
LWEA1000TM-171EAC	25	Nameplatecurve on request	188.2≈	527%	48,326	4,000	n/a	380	1,000	Estimated
LWEA800TM-169EAC	25	Nameplatecurve on request	220.3≈	634%	37,370	4,000	n/a	380	800	Estimated
LWEA710TM-168EAC	25	Nameplatecurve on request	87.4≈	191%	26,120	3,000	n/a	380	710	Estimated
LWBE3G560-218PT-06EC	25	Nameplatecurve on request	235.1≈	684%	23,896	5,600	92	400	560	Estimated	Curve Datasheet
LWBE3G560-218NT-13EC	25	Nameplatecurve on request	235.1≈	684%	23,896	5,600	85	400	560	Estimated	Curve Datasheet
LWAE3G800TS-4PKW-04EC	25	Nameplatecurve on request	97.8≈	226%	29,400	1,799	72	380	800	Estimated	Curve Datasheet
LWAE3G800TS-5MKW-01EC	25	Nameplatecurve on request	93.7≈	212%	25,711	1,850	82	3-380	800	Estimated	Curve Datasheet
LWAE3G800TS-5MKW-04EC	25	Nameplatecurve on request	63.6≈	112%	27,975	2,396	n/a	380	800	Estimated	Curve Datasheet

“Measured” = wind-tunnel test data; “Digitised” = read from the catalogue curve, for pre-selection; “Estimated” = no curve in the library yet — the pressure at your airflow is estimated from the nameplate maxima with a conservative straight-line curve, so ask for the measured curve before finalising. Power, noise and max airflow are nameplate values, not values at your duty point. Final selection is subject to duty-point verification and engineering confirmation.

Know the fan type you need? Enter the category and see its full parameter range.

Centrifugal Fans614 modelsHigh static pressure: AHU / RTU, CRAH, dust extraction Airflow155–23,896 m³/hPressure100–5,401 PaSize108–630 mm Axial Fans435 modelsHigh airflow, low–medium pressure: condensers, heat pumps, ventilation Airflow23–48,326 m³/hPressure60–3,690 PaSize145–1,000 mm Cross Flow Fans318 modelsLong even discharge: indoor AC units, air curtains Airflow23–4,000 m³/hPressure8–320 PaSize30–150 mm Inline Duct Fans125 modelsInline in ductwork: fresh air, exhaust, pressurisation Airflow140–7,100 m³/hPressure58–1,030 PaSize98–400 mm Cooling Fans & Blowers879 modelsElectronics and cabinet cooling, compact blowers Airflow2–4,800 m³/hPressure5–2,650 PaSize24–254 mm Commercial Centrifugal Blowers26 modelsDD / AT / RDH blowers for kitchens and process air Airflow139–11,000 m³/hPressure215–910 PaSize178–500 mm

Only know the application? Pick it below — each duty point is pre-verified against the library.

Not sure what airflow and static pressure to enter? Pick the closest application — every duty point below returns matching models from our measured library.

2,616models

Ø24–1,000impeller size, mm

0–61kairflow, m³/h

849measured P-Q curves

2,316dimensional drawings

Browse by product line

Every category page is a selector for that fan type: filter by airflow, static pressure, voltage, size and motor, then compare in the data table.

Centrifugal Fans614 models

High static pressure: AHU / RTU, data-center CRAH, dust extraction

Backward Curved Centrifugal Fans Plug Fans (RLM Plenum Fans)Single Inlet Forward Curved Blowers Dual Inlet Forward Curved Blowers Forward Curved Centrifugal Fans

Axial Fans435 models

High airflow, low–medium pressure: condensers, heat pumps, ventilation

AC Axial Fans EC Axial Fans Industrial Axial Fans Tube Axial Fans DC Axial Fans

Cross Flow Fans318 models

Even linear discharge, low noise: indoor AC units, air curtains

DC Cross Flow Fans AC Cross Flow Fans EC Cross Flow Fans

Inline Duct Fans125 models

Metal / plastic / ultra-silent / mixed flow, inline in ductwork

Ultra Silent Duct Fans Mixed Flow Fans Metal Inline Duct Fans Plastic Inline Duct Fans

Cooling Fans & Blowers879 models

Electronics and cabinet cooling, DC blowers, air knives

DC Axial Cooling Fans DC Centrifugal Blowers Air Blowers (Air Knife / Air Pump)EC Cooling Fans

Commercial Centrifugal Blowers26 models

DD direct drive and LWFA series for kitchens and ventilation units

Impeller Ø280–500 mm Impeller Ø178–254 mm

Gas Blowers56 models

Burner and boiler air supply, premix and forced draft

Fan Coil Units44 models

Chilled-water terminal units, exposed / concealed / cassette

Horizontal Concealed FCU Horizontal Exposed FCU Vertical Concealed FCU Vertical Exposed FCU Cassette FCU

Explosion-Proof Fans31 models

Ex-rated axial and centrifugal fans for hazardous areas

Poultry & Livestock Fans30 models

Tunnel and minimum ventilation for barns and greenhouses

Motor Cooling Fans30 models

Forced cooling for VFD-driven motors

Rail Transit Fans11 models

Vehicle and platform ventilation

Exhaust Fans13 models

Wall and roof exhaust, floor dryers

Anti-Corrosion Fans4 models

PP / FRP fans for corrosive and humid air

How selection works here

Three steps from duty point to quotation — no login, no spreadsheet.

1Enter the duty pointAirflow and static pressure at the design condition. Use the application presets if you only know the use case.

2Check the curveEach result shows the speed grade that meets the point, the available pressure and the margin. 10–25% margin is ideal.

3Get files and quoteDownload the dimensional drawing, P-Q curve and datasheet. Add models to the RFQ list and submit once — an engineer replies within 1 business day.