Nicotra Gebhardt AT 15/15 Alternative — LONGWELL LWFA-E-450 direct-drive blowers
Looking for an alternative to Nicotra Gebhardt AT 15/15? LONGWELL does not build belt-driven DIDW fans, so there is no frame-15/15 mirror. The nearest LONGWELL direct-drive units are the LWFA-E-400 and LWFA-E-450 double-inlet forward-curved blowers (up to 10,500 m³/h at 750 Pa, Ø450 mm) — motor inside the impeller, no belt or pulley — and for the top of the AT 15/15 envelope a FanGrid array of LWBE3G EC backward-curved plug fans. Selection is by duty point; delivery 15–30 days.
AT 15/15
LWFA-E-450 direct-drive blowers
Specification Comparison
| Specification | Nicotra Gebhardt AT 15/15 | LONGWELL LWFA-E-450 direct-drive blowers |
|---|---|---|
| Fan type | DIDW belt-drive double-inlet forward-curved | Forward-curved double-inlet centrifugal, direct-drive external-rotor |
| Impeller / frame | Ø381 mm · frame 15/15 | Ø400–450 mm · scroll housing, direct drive Per manufacturer quotation |
| Airflow range | up to 16,000 m³/h | up to 10,500 m³/h per unit (LWFA-E-450-02) · 11,000 m³/h (LWFA-E-500-02) |
| Static pressure (max) | up to 1,000 Pa | up to 750 Pa (Ø450) · 910 Pa (Ø500) |
| Power class | motor-selectable (IE3/IE4/EC) | external-rotor AC motor, rated per model |
| Noise floor (Lw) | 80 dB(A) | from 68 dB(A) (nameplate, per model) |
| Voltage | 230 / 400 V · 380–480 V 3Φ | 220–230 V 1Φ (380–400 V 3Φ via LWBE3G FanGrid) |
| Drive / motor | Belt-drive, IE3/IE4 motor (EC retrofit) | Direct drive — motor inside the impeller hub, no belt Belt-free |
| Certifications | CE · UL · EAC · AMCA | 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 |
Selection is by duty point, not by frame number. Send the AT 15/15 operating point (m³/h at Pa) and the supply voltage; LONGWELL returns the LWFA-E model — or a FanGrid array — with its curve and dimensioned drawing.
LWFA-E-450 direct-drive blowers at a glance
Production Lead Time
Pricing
No Belt to Maintain
Installation and control vs the AT 15/15: what to check
Frame & dimensions
The LWFA-E-450 is a scroll-housing double-inlet blower with the motor inside the impeller; its outlet flange, foot pattern and depth differ from a belt-driven AT 15/15 with its separate motor and slide rails. The AHU fan section is re-railed at retrofit and the outlet transition adapted; a dimensioned drawing is on the model page of the selection site.
Drive & motor options
LONGWELL builds direct-drive fans only: external-rotor AC motors as standard on the LWFA-E blowers (220–230 V 1Φ), EC motors on the LWDD blowers and on the LWBE3G plug fans (230 V 1Φ or 380–400 V 3Φ, 0–10 V / PWM / Modbus RTU). There is no belt-drive variant and no "-K" designation.
Performance
AT 15/15 duties up to about 10,500 m³/h at 750 Pa are covered by the LWFA-E-450-02; the top of the AT 15/15 envelope (up to 16,000 m³/h at 1,000 Pa) is covered by two LWBE3G450 or LWBE3G500 EC plug fans in a FanGrid. Enter the duty point on the selector to see every model whose curve covers it.
Typical Applications
LWFA-E direct-drive blowers and LWBE3G FanGrid arrays are used across mid-size commercial AHU and supply-air duty. Common application categories include:
- Mid-large commercial AHU
- Library / theatre HVAC
- Industrial supply air
Where the existing AT 15/15 runs with a VFD, the EC FanGrid option gives the same variable-volume control from a 0–10 V or Modbus RTU signal without a separate drive.
FAQ
Is there a size-for-size LONGWELL equivalent of the Nicotra AT 15/15?
Does LONGWELL offer an EC version?
What are LONGWELL's lead times and pricing?
What should I send to get a verified proposal?
Can I get the full Nicotra-to-LONGWELL cross-reference?
Evaluate a LONGWELL alternative to AT 15/15 — 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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