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Ziehl-Abegg FN091 Alternative — LONGWELL LWAE3G900

Looking for an alternative for Ziehl-Abegg FN091-ZIQ.GG.A7? The LONGWELL LWAE3G900 has the same impeller diameter. Catalogue ratings, measured curves and dimensioned drawings for every model are on the LONGWELL Fan Selector; final selection is made at your duty point. Typical applications: hyperscale data center free cooling, cooling tower, large dry cooler.

Reference model: Ziehl-Abegg FN091-ZIQ.GG.A7 Diameter: Ø910 mm Family: FN axial → LONGWELL LWBE3G / LWAE3G / LWFC Sample: 1–3 days
Reference model
Ziehl-Abegg
FN091
FN axial · EC axial fan · Ø910 mm
→
LONGWELL series
LONGWELL
LWAE3G900
Same impeller diameter (Ø910 mm) · dimensions per LONGWELL drawing · 15–30 day production lead time

Specification Comparison

Specification Ziehl-Abegg FN091 LONGWELL LWAE3G900
Fan type EC axial fan EC axial fan
Impeller diameter Ø910 mm Ø910 mm 2 models
Airflow range 11,000–34,000 m³/h up to 32,313 m³/h
Static pressure (max) 380 Pa up to 365 Pa
Motor power (max) 8,500 W up to 2,785 W
Noise floor (Lw) 82 dB(A) from 76 dB(A) (nameplate, per model)
Voltage 380–480 V 3Φ 380–400 V 3Φ
Control input 0–10 V / PWM / Modbus / EC-Control 0–10 V / PWM / Modbus RTU (RS485)
IP rating IP54 / IP55 IP54 (per model)
Certifications CE · UL · VDE · EAC CE · RoHS
Sample lead time Per manufacturer quotation 1–3 days
Series lead time (≤500 units) Per manufacturer quotation 15–30 days
Pricing Per manufacturer quotation Quoted per project
Verify it on the LONGWELL selector: all 2 LWAE3G900 models — data, measured curves, drawings · LWAE3G900TS-5MGW-01 (largest airflow in the series) · check your own duty point · samples, MOQ and lead time

LWAE3G900 at a glance

Production Lead Time

15–30 days
Ex works for production batches. Stock standard models ship as samples in 1–3 days.

Pricing

Quoted per project
Price depends on model, voltage, control option and quantity. Sample fees are credited in full against the first production order.

Same Impeller Diameter

Ø910 mm
Same impeller diameter; confirm the mounting hole pattern and inlet ring against the LONGWELL drawing before ordering.

Installation and control: what to check

Mechanical

Mounting dimensions, inlet ring diameter, motor shaft height and terminal-box position of the LONGWELL LWAE3G900 are given on its dimensioned drawing. Compare them with the installed fan before ordering.

Electrical & control

The LONGWELL LWAE3G900 accepts a 0–10 V analog speed reference, PWM and Modbus RTU (RS485) control signals (per model; see the model datasheet). LONGWELL supplies its Modbus RTU register map with the fan so the BMS points can be re-mapped; the register addresses are not identical to the Ziehl-Abegg map.For other bus protocols, ask LONGWELL engineering for the integration options.

Performance

The measured P-Q curve of every LONGWELL model is on its model page; we check your duty point against it before quoting.

Typical Applications

The LWAE3G900 is typically specified for hyperscale data center free cooling, cooling tower, large dry cooler. Common application categories include:

  • Hyperscale free cooling
  • Cooling tower
  • Large dry cooler

Particularly suited for hyperscale data center free cooling at coil-array scale.

FAQ

What should I check before using LONGWELL LWAE3G900 in place of Ziehl-Abegg FN091?
The impeller diameter is the same. Confirm the mounting hole pattern, inlet ring diameter and shaft height against the dimensioned drawing on the LONGWELL LWAE3G900 model page before ordering; the available control inputs (0–10 V / PWM / Modbus RTU) and voltages are listed in the table above.
Where can I find efficiency data for LWAE3G900?
LONGWELL does not publish a single peak-efficiency figure for the LWAE3G900. The model page on the selection site gives airflow, static pressure and input power along the curve (measured where marked, nameplate-estimated otherwise), so the efficiency at your duty point follows directly; a test report for a specific model is available from engineering on request.
What is the LONGWELL lead time?
LONGWELL LWAE3G900 ships in 15–30 days for orders up to 500 units and 6–10 weeks for 1,000+ unit OEM programs. Sample units ship in 1–3 days from stocked Ø910 mm inventory.
How is LONGWELL pricing determined?
LONGWELL quotes per project. Pricing depends on quantity, voltage, IP rating, and control protocol options.
What applications is LWAE3G900 typically used for?
LWAE3G900 is typically specified for hyperscale data center free cooling, cooling tower, large dry cooler. Particularly suited for hyperscale data center free cooling at coil-array scale.

Evaluate a LONGWELL alternative to FN091 — samples in 1–3 days

Send a quick request — model + quantity + delivery address. Sample unit ships in 1–3 days for field validation. Series production at 15–30 day lead time after PO.

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Official Product Page
Browse the full EC Axial Fans range on longwellfans.com — request a quote on LWAE3G900 directly.
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Ziehl-Abegg® is a registered trademark of its owner. This page is published by LONGWELL, an independent manufacturer and is not affiliated with, endorsed by, or sponsored by Ziehl-Abegg. All performance data sourced from publicly available datasheets. All performance figures reflect specific test conditions; final selection should be confirmed by duty point, voltage/control, mounting and project validation.