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ebm-papst R3G355 Alternative — LONGWELL LWBE3G355

Looking for an alternative for ebm-papst R3G355-AM29-71? The LONGWELL LWBE3G355 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. R3G is ebm-papst's primary backward-curved centrifugal line; LONGWELL covers this size in the LWBE3G355 series.

Reference model: ebm-papst R3G355-AM29-71 Diameter: Ø355 mm Family: R3G → LONGWELL LWBE3G (backward-curved EC) Sample: 1–3 days
Reference model
ebm-papst
R3G355
R3G · EC backward-curved centrifugal · Ø355 mm
→
LONGWELL series
LONGWELL
LWBE3G355
Same impeller diameter (Ø355 mm) · dimensions per LONGWELL drawing · 15–30 day production lead time

Specification Comparison

Specification ebm-papst R3G355 LONGWELL LWBE3G355
Fan type EC backward-curved centrifugal EC backward-curved centrifugal
Impeller diameter Ø355 mm Ø355 mm 21 models
Airflow range up to 7,045 m³/h up to 8,034 m³/h
Static pressure (max) up to 1,751 Pa up to 2,524 Pa
Motor power (max) ≈1,700 W class up to 3,100 W
Noise floor (Lw) 74 dB(A) from 68 dB(A) (nameplate, per model)
Voltage 200–277 V 220–230 V 1Φ · 380–400 V 3Φ
Control input 0–10 V / PWM / Modbus / EC-Control 0–10 V / PWM / Modbus RTU (RS485)
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 21 LWBE3G355 models — data, measured curves, drawings · LWBE3G355-188NT-26 (largest airflow in the series) · check your own duty point · samples, MOQ and lead time

Matched to ebm-papst R3G355-AM29-71 by impeller size and fan type — LONGWELL model LWBE3G355-138PT-05. Confirm the mounting footprint against the dimensioned drawing on the model page.

LWBE3G355 at a glance

Production Lead Time

15–30 days
Ex works for production batches. Sample units 1–3 days from stock.

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

Ø355 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 of the LONGWELL LWBE3G355 are given on its dimensioned drawing. Confirm the mounting dimensions against the LONGWELL drawing before ordering.

Electrical & control

The LONGWELL LWBE3G355 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 register map for BMS integration. 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. Two engineered variants exist: -138PT-05 (higher airflow, up to ~7,045 m³/h) and -102PT-10 (higher static, up to ~1,751 Pa).

Typical Applications

The LWBE3G355 is typically specified for industrial AHU, large-area HVAC and high-resistance filtration. Common application categories include:

  • Industrial AHU
  • Large-area HVAC
  • High-resistance industrial filtration

At Ø355 mm LONGWELL offers both a performance-matched and a higher-output (LWBE3G355-138PT-05) variant for large-area HVAC.

FAQ

What should I check before using LONGWELL LWBE3G355 in place of ebm-papst R3G355?
The impeller diameter is the same — confirm the mounting hole pattern and inlet ring against the LONGWELL drawing on the model page. Available control inputs (0–10 V / PWM / Modbus RTU) and voltages are listed in the table above. Confirm the mounting hole pattern and inlet ring against the LONGWELL drawing on the model page. Matched model: LWBE3G355-138PT-05.
Where can I find efficiency data for LWBE3G355?
LONGWELL does not publish a single peak-efficiency figure for the LWBE3G355. 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 LWBE3G355 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 Ø355 mm inventory.
How is LONGWELL pricing determined?
LONGWELL quotes per project. Pricing depends on quantity, voltage, IP rating, and control protocol options.
Is R3G the same as K3G?
No. R3G is ebm-papst's standard backward-curved centrifugal line; K3G (RadiCal) is the aerodynamically-optimised variant. They share frame sizes but differ in wheel design and part number. This page maps the R3G355 specifically; for the RadiCal equivalent see the K3G355 page in the alternatives index.

Evaluate a LONGWELL alternative to R3G355 — 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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Official Product Page
Browse the full Backward-Curved Centrifugal EC Fans range on longwellfans.com — request a quote on LWBE3G355 directly.
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ebm-papst® is a registered trademark of ebm-papst Group. LONGWELL is an independent manufacturer and is not affiliated with, endorsed by, or sponsored by ebm-papst. Any references to third-party trademarks are used solely for identification and comparison purposes. All performance figures reflect specific test conditions; final selection should be confirmed by duty point, voltage/control, mounting and project validation.