Ziehl-Abegg RH112C Alternative — LONGWELL LWHV-1120-XL-EC

Looking for an alternative for Ziehl-Abegg RH112C-6DK? The LONGWELL LWHV-1120-XL-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 18–24 weeks ex-works Ziehl-Abegg. Widely deployed across mega-scale industrial process, mining main fans, tunnel ventilation.

Replaces: Ziehl-Abegg RH112C-6DK Diameter: Ø1120 mm Family: RH series → LONGWELL LWBE3G / LWAE3G / LWHV / LWFC Sample: 1–3 days

Replacing

Ziehl-Abegg
RH112C

RH series · EC backward-curved centrifugal plug fan · Ø1120 mm

→

With

LONGWELL
LWHV-1120-XL-EC

Drop-in dimensional match · Same control · 15-day delivery

Specification Comparison

Specification	Ziehl-Abegg RH112C	LONGWELL LWHV-1120-XL-EC
Fan type	EC backward-curved centrifugal plug fan	EC backward-curved centrifugal plug fan
Impeller diameter	Ø1120 mm	Ø1120 mm Drop-in
Airflow range	5,500–38,000 m³/h	5,500–38,000 m³/h
Static pressure (max)	1500 Pa	1500 Pa
Motor power (max)	22,000 W	22,000 W
Wire-to-air η peak (AMCA 210)	89%	88%
Noise floor (Lw)	52 dB(A)	53 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)	18–24 weeks	15–30 days
Landed cost index (LONGWELL = 100)	175–200	100 (baseline)

Why Engineers Switch from RH112C to LWHV-1120-XL-EC

4–8× Faster Delivery

15–30 days

vs 18–24 weeks ex-works for Ziehl-Abegg in 2026 (active allocation). Sample units 1–3 days from stock vs 4–10 weeks.

40–55% Lower Landed Cost

−€600 to −€2,400

per unit at equivalent spec, depending on size and quantity. On a 50-unit FanGrid retrofit, typical CapEx delta is €30k–€120k.

True Drop-In Compatibility

±0.5 mm

mounting hole tolerance + identical control protocol. Installation time same as same-brand replacement.

Drop-In Compatibility Details

Mechanical match

The LONGWELL LWHV-1120-XL-EC matches the Ziehl-Abegg RH112C 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 LWHV-1120-XL-EC accepts the same 0–10 V analog speed reference, PWM (1 kHz), and Modbus RTU (RS485) control signals as Ziehl-Abegg RH112C. Default Modbus register map is compatible with the Ziehl-Abegg ecosystem; LONGWELL provides a free Modbus map cross-reference for BMS integration. Ziehl-Abegg-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 LWHV-1120-XL-EC sits within 2–3% of the Ziehl-Abegg RH112C 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 88% vs 89% for Ziehl-Abegg (1 pp delta at peak). In typical part-load HVAC duty, the gap narrows to within 1 pp.

Typical Applications

The LWHV-1120-XL-EC is widely deployed across mega-scale industrial process, mining main fans, tunnel ventilation. Common application categories include:

Mega process
Mining main
Tunnel

Particularly suited for mining main fans and mega-scale industrial process.

FAQ

Is LONGWELL LWHV-1120-XL-EC a true drop-in replacement for Ziehl-Abegg RH112C?

Yes. The LWHV-1120-XL-EC matches the RH112C dimensionally (mounting hole pattern, inlet ring diameter, motor shaft height) within ±0.5 mm tolerance, accepts the same 0–10 V analog / PWM / Modbus RTU control signals, and operates from the same 380–480 V 3Φ supply. Installation time and AHU integration are identical to a same-brand replacement.

How does LWHV-1120-XL-EC compare on efficiency to RH112C?

Ziehl-Abegg RH112C delivers 89% peak wire-to-air efficiency at BEP. LONGWELL LWHV-1120-XL-EC measures 88% in AMCA 210/211 third-party testing — a 1 pp difference at peak. In typical part-load HVAC duty (30–80% of design airflow), the gap narrows to within 1 pp because both platforms hold flat η curves across their operating range.

What’s the 2026 lead time difference?

As of May 2026: Ziehl-Abegg RH112C requires 18–24 weeks ex-works due to ongoing allocation. LONGWELL LWHV-1120-XL-EC 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 Ø1120 mm inventory.

What’s the cost delta?

At equivalent specification (same Ø, same airflow/Pa, same IP, same control), LONGWELL LWHV-1120-XL-EC typically lands at 40–55% below Ziehl-Abegg RH112C ex-works pricing. Final pricing depends on quantity, voltage, IP rating, and control protocol options.

What applications is LWHV-1120-XL-EC typically used for?

LWHV-1120-XL-EC is widely deployed across mega-scale industrial process, mining main fans, tunnel ventilation. Particularly suited for mining main fans and mega-scale industrial process.

Replace your RH112C 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

Official Product Page

Browse the full Industrial / High-Pressure Centrifugal Fans range on longwellfans.com — request a quote on LWHV-1120-XL-EC directly.

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LONGWELL is an independent manufacturer and is not affiliated with, endorsed by, or sponsored by Ziehl-Abegg. Ziehl-Abegg® is a registered trademark of Ziehl-Abegg GmbH. All product names, logos, and brands are property of their respective owners. This page is published as engineering reference based on publicly available datasheets.