Nicotra Gebhardt ADH Alternative — LONGWELL ADH-L / ADH-R series
Looking for an alternative to Nicotra Gebhardt ADH? LONGWELL's commercial centrifugal line mirrors the Nicotra naming 1:1 — ADH-L / ADH-R series — 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.
ADH
ADH-L / ADH-R series
Specification Comparison
| Specification | Nicotra Gebhardt ADH | LONGWELL ADH-L / ADH-R series |
|---|---|---|
| Fan type | Forward-curved asymmetric-outlet centrifugal | Forward-curved asymmetric-outlet centrifugal |
| Impeller / frame | Ø250–560 mm · asymmetric | Ø250–560 mm · asymmetric Drop-in |
| Airflow range | 4,500–25,000 m³/h | 4,500–25,000 m³/h |
| Static pressure (max) | 800–1,300 Pa | 800–1,300 Pa |
| Power class | motor-selectable (IE3/IE4) | motor-selectable (IE3/IE4) |
| AMCA 210 static efficiency (peak) | 70% | 70% |
| Noise floor (Lw) | 81 dB(A) | 81 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 ADH 250 – ADH 560 (asymmetric outlet) in LONGWELL's cross-brand model library. ADH-L 250 → ADH 250; ADH-R 400 → ADH 400; ADH-R 560 → ADH 560. Left/right hands available to match outlet orientation.
Why Engineers Switch from ADH to ADH-L / ADH-R series
4–8× Faster Delivery
40–55% Lower Landed Cost
Belt or EC-Upgrade Path
Drop-In Compatibility Details
Frame & dimensional match
LONGWELL ADH-L / ADH-R series carries the identical asymmetric frame designation as Nicotra ADH — 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 ADH-L / ADH-R series belt-driven with a selectable IE3 / IE4 motor to match the existing Nicotra ADH 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 ADH-L / ADH-R series tracks the Nicotra ADH within AMCA 210 test tolerance across the operating envelope (third-party tested). ADH-L 250 → ADH 250; ADH-R 400 → ADH 400; ADH-R 560 → ADH 560. Left/right hands available to match outlet orientation. Performance is matched at the published duty point, with LONGWELL's documented cross-brand library backing the selection.
Typical Applications
The LONGWELL ADH-L / ADH-R series is widely deployed across packaged AHU with asymmetric side-outlet and commercial ventilation. Common application categories include:
- Packaged AHU with side outlet
- Factory / commercial ventilation
- Air-curtain & make-up air
ADH's asymmetric outlet suits packaged-AHU duct orientation; LONGWELL ADH-L (left) and ADH-R (right) mirror both hands.
FAQ
Is LONGWELL ADH-L / ADH-R series dimensionally interchangeable with Nicotra ADH?
Does LONGWELL offer an EC-upgrade for the ADH?
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 ADH 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.
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