🔥 Get Full Catalog

Ziehl-Abegg RH45C Alternative — LONGWELL LWBE3G450

Looking for an alternative for Ziehl-Abegg RH45C-4DK? The LONGWELL LWBE3G450 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: Large commercial AHU, CRAH FanGrid, liquid cooling CDU.

Reference model: Ziehl-Abegg RH45C-4DK Diameter: Ø450 mm Family: RH series → LONGWELL LWBE3G / LWAE3G / LWFC Sample: 1–3 days
Reference model
Ziehl-Abegg
RH45C
RH series · EC backward-curved centrifugal plug fan · Ø450 mm
→
LONGWELL series
LONGWELL
LWBE3G450
Same impeller diameter (Ø450 mm) · dimensions per LONGWELL drawing · 15–30 day production lead time

Specification Comparison

Specification Ziehl-Abegg RH45C LONGWELL LWBE3G450
Fan type EC backward-curved centrifugal plug fan EC backward-curved centrifugal plug fan
Impeller diameter Ø450 mm Ø450 mm 19 models
Airflow range 1,200–7,000 m³/h up to 12,647 m³/h
Static pressure (max) 1550 Pa up to 2,342 Pa
Motor power (max) 2,200 W up to 4,600 W
Noise floor (Lw) 72 dB(A) from 68 dB(A) (nameplate, per model)
Voltage 380–480 V 3Φ 220–230 V 1Φ · 380–400 V 3Φ
Control input 0–10 V / PWM / Modbus / EC-Control 0–10 V / PWM / Modbus RTU (RS485)
IP rating IP54 / IP55 IP44 / IP54 / IP55 (per model)
Certifications CE · UL · VDE · EAC CE · RoHS · ETL on single-phase 115/230 V versions (UL 507 / CSA C22.2 No.113)
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 19 LWBE3G450 models — data, measured curves, drawings · LWBE3G450-188NT-21 (largest airflow in the series) · check your own duty point · samples, MOQ and lead time

LWBE3G450 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

Ø450 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 LWBE3G450 are given on its dimensioned drawing. Compare them with the installed fan before ordering.

Electrical & control

The LONGWELL LWBE3G450 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 LWBE3G450 is typically specified for Large commercial AHU, CRAH FanGrid, liquid cooling CDU. Common application categories include:

  • Large AHU
  • CRAH
  • Liquid cooling CDU

Particularly suited for large commercial AHU and CRAH FanGrid retrofit.

FAQ

What should I check before using LONGWELL LWBE3G450 in place of Ziehl-Abegg RH45C?
The impeller diameter is the same. Confirm the mounting hole pattern, inlet ring diameter and shaft height against the dimensioned drawing on the LONGWELL LWBE3G450 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 LWBE3G450?
LONGWELL does not publish a single peak-efficiency figure for the LWBE3G450. 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 LWBE3G450 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 Ø450 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 LWBE3G450 typically used for?
LWBE3G450 is typically specified for Large commercial AHU, CRAH FanGrid, liquid cooling CDU. Particularly suited for large commercial AHU and CRAH FanGrid retrofit.

Evaluate a LONGWELL alternative to RH45C — 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.

Request Sample View Full Cross-Reference Table
Official Product Page
Browse the full Backward-Curved Centrifugal EC Fans range on longwellfans.com — request a quote on LWBE3G450 directly.
View on longwellfans.com →
Ziehl-Abegg® is a registered trademark of Ziehl-Abegg GmbH. LONGWELL is an independent manufacturer and is not affiliated with, endorsed by, or sponsored by Ziehl-Abegg. This page is published as engineering reference based on public datasheets. All performance figures reflect specific test conditions; final selection should be confirmed by duty point, voltage/control, mounting and project validation.