Nicotra Gebhardt RDP 355 Alternative — LONGWELL LWBE3G-355-EC
Looking for an alternative for Nicotra Gebhardt RDP 355? The LONGWELL LWBE3G-355-EC is the dimensionally interchangeable equivalent — same mounting, same control protocol, AMCA 210/211 third-party-tested performance — at 40–55% lower landed cost with 15-day delivery vs 10–14 weeks ex-works Nicotra Gebhardt. Widely deployed across Cleanroom FFU, AHRI-cert AHU, pharma cleanroom.
RDP 355
LWBE3G-355-EC
Specification Comparison
| Specification | Nicotra Gebhardt RDP 355 | LONGWELL LWBE3G-355-EC |
|---|---|---|
| Fan type | EC plug fan | EC plug fan |
| Impeller diameter | Ø355 mm | Ø355 mm Drop-in |
| Airflow range | 800–4,500 m³/h | 800–4,500 m³/h |
| Static pressure (max) | 1200 Pa | 1200 Pa |
| Motor power (max) | 950 W | 950 W |
| Wire-to-air η peak (AMCA 210) | 89% | 87% |
| Noise floor (Lw) | 68 dB(A) | 71 dB(A) |
| Voltage | 380–480 V 3Φ | 380–480 V 3Φ |
| Control input | 0–10 V / PWM / Modbus / EC-Control | 0–10 V / PWM / Modbus RTU / Modbus TCP Compatible |
| IP rating | IP54 / IP55 | IP54 std · IP55 / IP67 option |
| Certifications | CE · UL · VDE · EAC | CE · UL · cUL · TÜV · ATEX · VDE · 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 RDP 355 in LONGWELL's cross-brand model library. The LWBE3G-355-EC is a dimensional drop-in with the same 0–10 V / PWM / Modbus control interface and AMCA 210/211 third-party-tested performance across the full operating envelope.
Why Engineers Switch from RDP 355 to LWBE3G-355-EC
4–8× Faster Delivery
40–55% Lower Landed Cost
True Drop-In Compatibility
Drop-In Compatibility Details
Mechanical match
The LONGWELL LWBE3G-355-EC matches the Nicotra Gebhardt RDP 355 mounting pattern (M-mount, ISO 9001 plenum-fan footprint) within ±0.5 mm tolerance. Inlet ring diameter, motor shaft height, and electrical termination box position are identical. Drop-in retrofit requires no AHU rework, no plate modification, and no plenum hole resizing.
Electrical & control match
The LWBE3G-355-EC accepts the same 0–10 V analog speed reference, PWM (1 kHz), and Modbus RTU (RS485) control signals as Nicotra Gebhardt RDP 355. Default Modbus register map is compatible with the Nicotra Gebhardt ecosystem; LONGWELL provides a free Modbus map cross-reference for BMS integration. Nicotra Gebhardt-specific proprietary protocols (EC-Control bus / ZA-control) are bridged via a free MODBUS gateway available from LONGWELL Engineering — no BMS reprogramming required.
Performance match
The PQ curve of LONGWELL LWBE3G-355-EC sits within 2–3% of the Nicotra Gebhardt RDP 355 curve across the full operating envelope (verified by third-party AMCA 210/211 testing at TÜV and Intertek labs). Wire-to-air efficiency at BEP is 87% vs 89% for Nicotra Gebhardt (2 pp delta at peak). In typical part-load HVAC duty, the gap narrows to within 1 pp.
Typical Applications
The LWBE3G-355-EC is widely deployed across Cleanroom FFU, AHRI-cert AHU, pharma cleanroom. Common application categories include:
- Cleanroom FFU
- AHRI-certified AHU
- Pharma cleanroom
Particularly suited for cleanroom FFU and AHRI-certified AHU OEM specifications.
FAQ
Is LONGWELL LWBE3G-355-EC a true drop-in replacement for Nicotra Gebhardt RDP 355?
How does LWBE3G-355-EC compare on efficiency to RDP 355?
What's the 2026 lead time difference?
What's the cost delta?
What applications is LWBE3G-355-EC typically used for?
Replace your RDP 355 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