Nicotra Gebhardt AT 18/18 Alternative — LONGWELL AT 18-18L / 18-18LK
Looking for an alternative to Nicotra Gebhardt AT 18/18? LONGWELL's commercial centrifugal line mirrors the Nicotra naming 1:1 — AT 18-18L / 18-18LK — with identical frame designation, dimensional interchangeability, belt-drive or factory EC-upgrade, AMCA-tested aerodynamics, at 40–55% lower landed cost and 15-day delivery vs 10–14 weeks ex-works Nicotra. This is the single highest-value naming-mirror battle in the commercial AHU segment.
AT 18/18
AT 18-18L / 18-18LK
Specification Comparison
| Specification | Nicotra Gebhardt AT 18/18 | LONGWELL AT 18-18L / 18-18LK |
|---|---|---|
| Fan type | DIDW belt-drive double-inlet forward-curved | DIDW belt-drive double-inlet forward-curved |
| Impeller / frame | Ø457 mm · frame 18/18 | Ø457 mm · frame 18/18 Drop-in |
| Airflow range | up to 28,000 m³/h | up to 28,000 m³/h |
| Static pressure (max) | up to 1,200 Pa | up to 1,200 Pa |
| Power class | motor-selectable (IE3/IE4/EC) | motor-selectable (IE3/IE4/EC) |
| AMCA 210 static efficiency (peak) | 72% | 72% |
| Noise floor (Lw) | 82 dB(A) | 82 dB(A) |
| Voltage | 230 / 400 V · 380–480 V 3Φ | 230 / 400 V · 380–480 V 3Φ |
| Drive / motor | Belt-drive, IE3/IE4 motor (EC retrofit) | Belt-drive IE3/IE4 standard, factory EC option Match + EC option |
| Certifications | CE · UL · EAC · AMCA | CE · UL · cUL · TÜV · EAC · RoHS · REACH |
| Sample lead time | 4–10 weeks | 1–3 days |
| Series lead time (≤500 units) | 10–14 weeks | 15–30 days |
| Landed cost index (LONGWELL = 100) | 175–200 | 100 (baseline) |
Engineered match verified against Nicotra Gebhardt AT 18/18 (also AT 18/13) in LONGWELL's cross-brand model library (record: NAMING_MIRROR — The AT 18-18L mirrors the Nicotra AT 18/18 frame 1:1). The AT 18-18L mirrors the Nicotra AT 18/18 frame 1:1; the 18-18LK adds a factory EC-drive option for variable-volume AHU.
Why Engineers Switch from AT 18/18 to AT 18-18L / 18-18LK
4–8× Faster Delivery
40–55% Lower Landed Cost
Belt or EC-Upgrade Path
Drop-In Compatibility Details
Frame & dimensional match
LONGWELL AT 18-18L / 18-18LK carries the identical frame 18/18 frame designation as Nicotra AT 18/18 — scroll dimensions, inlet cone, outlet flange, and shaft/bearing centres match 1:1, so it drops into the same AHU section, the same belt-guard, and the same pedestal without rework.
Drive & motor options
LONGWELL ships the AT 18-18L / 18-18LK belt-driven with a selectable IE3 / IE4 motor to match the existing Nicotra AT 18/18 drive train, and offers a factory EC-upgrade variant (the -K suffix) that replaces the belt with a direct EC drive for variable-volume AHU and 25–40% fan energy savings.
Performance match
The aerodynamic curve of LONGWELL AT 18-18L / 18-18LK tracks the Nicotra AT 18/18 within AMCA 210 test tolerance across the operating envelope (third-party tested). The AT 18-18L mirrors the Nicotra AT 18/18 frame 1:1; the 18-18LK adds a factory EC-drive option for variable-volume AHU. Performance is matched at the published duty point, with LONGWELL's documented cross-brand library backing the selection.
Typical Applications
The LONGWELL AT 18-18L / 18-18LK is widely deployed across large commercial AHU and 28,000 m³/h-class air handling. Common application categories include:
- Large commercial AHU
- Air-handling units 28,000 m³/h class
- Industrial supply/return air
The AT 18/18 frame is the high-volume large-AHU workhorse; LONGWELL AT 18-18L mirrors it 1:1 and adds an EC-upgrade path (18-18LK).
FAQ
Is LONGWELL AT 18-18L / 18-18LK dimensionally interchangeable with Nicotra AT 18/18?
Does LONGWELL offer an EC-upgrade for the AT 18/18?
What's the 2026 lead-time and cost difference?
Why does LONGWELL use the same model naming as Nicotra?
Can I get the full Nicotra-to-LONGWELL commercial cross-reference?
Replace your AT 18/18 in 5 days
Send a quick request — model + quantity + delivery address. Sample unit ships in 1–3 days for field validation. Series production at 15-day lead time after PO.
Request Sample View Full Cross-Reference Table