SINCE 1990
End-to-End Fan & Motor Platform
for AI-Era Data Centers
Powering PUE ≤ 1.3 cooling at AI rack densities. LWBE3G Plug FanWall serves CRAH/CRAC; LWAE3G axial EC serves outdoor condensers and cooling towers. One supplier. Three layers. AI-era ready.
Five reasons Tier-1 cooling OEMs run their EC fan supply on LONGWELL
Data center cooling is fundamentally different from commercial HVAC. Mission-critical uptime, mandatory PUE targets, EMC sensitivity to IT equipment, and N+1 redundancy at the fan level — these are not optional features but engineering preconditions. LWBE3G and LWAE3G are designed with the data center duty cycle as a primary use case, not a retrofit.
Complete Cooling Portfolio
From CRAH internal Plug FanWall (LWBE3G) → outdoor condenser (LWAE3G) → cooling tower (LWAE3G large arrays) → rack-level cooling. LONGWELL covers the entire data center cooling chain as a single supplier.
Quantifiable PUE Contribution
EC fans contribute average PUE reductions of 0.10-0.18. A top-3 global precision cooling OEM measured CRAH PUE dropping from 1.42 to 1.28 — enabling Tier-3 and Tier-4 compliance.
N+1 + Predictive Failure
Within a FanWall array, single-unit failure triggers automatic compensation by remaining fans. Optional bearing vibration sensors deliver 30-90 days advance warning of end-of-life.
EMC Class B for IT
Full EC platform certified to EN 55014-1/2 Class B + FCC Part 15 Class B — no interference with adjacent IT equipment. A standard most commercial HVAC fan makers cannot meet.
90-Day NPI + Stable Supply
Vertiv-class customers move from inquiry to samples in 6 weeks and to mass production in 90 days. 3-year frame agreements at 80,000+ units/year prove supply chain stability.
To Our Data Center Cooling Partners
To data center engineering, procurement, and operations leaders:
The AI compute revolution has changed what data center cooling means. Rack heat density has jumped from 15 kW to 60-100 kW in two years; liquid cooling adoption remains constrained by retrofit cost in existing facilities; air cooling will remain the architecture of 80% of global data centers — but only if it can be made dramatically more efficient.
This is where LONGWELL fits. We are not a generic HVAC fan supplier that happens to serve data centers — we are an EC fan platform whose technology roadmap, certification matrix, and customer engineering process were designed specifically for the data center duty cycle. LWBE3G backward-curved centrifugal serves CRAH and CRAC. LWAE3G axial EC serves outdoor condensers and cooling towers. Together they form an end-to-end fan supply solution that simplifies your supplier matrix and accelerates time-to-market.
This Pack documents what we offer and how we engage. §2 covers the data center cooling architecture and the engineering reality of AI-era thermal density. §3 maps our product portfolio to the four major DC cooling subsystems. §4 presents anonymized customer evidence including a flagship case with a top-3 global precision cooling OEM. §5 and §6 cover engineering support and engagement paths.
Rack Heat Density Evolution: 2020 → 2026
Two years ago, a typical data center rack dissipated 15-20 kW. Today, a rack housing NVIDIA H100 GPUs (700W per chip) easily reaches 60-80 kW; B200 deployments push past 100 kW. This is not incremental — it is a step change that breaks legacy CRAC/CRAH architecture sized for the old density assumptions.
| Era | Typical Density | GPU / CPU | Cooling Architecture | EC Fan Role |
|---|---|---|---|---|
| 2018-2020 Legacy | 5-8 kW/rack | Xeon E5/E7 | CRAC | Optional |
| 2020-2022 General Cloud | 8-15 kW/rack | Xeon Platinum | CRAC + Hot Aisle | Recommended |
| 2022-2024 Early AI | 15-30 kW/rack | V100 / A100 | CRAH + Hot/Cold Aisle | Near-required |
| 2024-2026 AI Training | 60-100 kW/rack | H100 / H200 | CRAH FanWall N+1 | Mandatory |
| 2025+ B200 / Blackwell | 100-200 kW/rack | B200 / GB200 | Hybrid liquid + EC air | Still EC-driven |
For existing air-cooled data centers, EC fans are no longer optional. AC fan systems cannot maintain PUE ≤ 1.3 at 60+ kW/rack densities — part-load efficiency falls off a cliff. EC penetration in all post-2024 new-build Tier-3/4 data centers is effectively 100%.
The Number Cooling Fan Efficiency Directly Drives
PUE = total facility power / IT equipment power. The closer to 1.0, the more efficient. Hyperscale targets PUE ≤ 1.2; enterprise Tier-3/4 mandates PUE ≤ 1.3. Cooling-system fan efficiency directly drives this number.
Global PUE Regulations & Targets
| Region | PUE Target | Driver |
|---|---|---|
| European Union | ≤ 1.3 (mandatory by 2027) | EU EED Directive 2023; mandatory DC annual reporting |
| United States | ≤ 1.4 (recommended) | DOE efficiency guidelines; federal DCs ≤ 1.2 |
| China | ≤ 1.25 (East-Data-West-Compute) | NDRC + State Council 8-hub initiative |
| Singapore | ≤ 1.4 (new-build mandatory) | IMDA + EMA new DC approval framework |
| Hyperscale Operators | ≤ 1.15 (Google, Meta) | Competitive pressure among hyperscale providers |
Uptime Tier Classifications & Redundancy
| Tier | Availability | Redundancy | LONGWELL Match |
|---|---|---|---|
| Tier I | 99.671% (≤ 28.8h/yr downtime) | Non-redundant | LWBE3G + LWAE3G standard |
| Tier II | 99.741% (≤ 22h/yr) | N+1 component redundancy | LWBE3G FanWall N+1 |
| Tier III | 99.982% (≤ 1.6h/yr) | N+1 + concurrent maintainability | FanWall + vibration monitor + 8D |
| Tier IV | 99.995% (≤ 26 min/yr) | 2N fault-tolerance + failover | LWBE/LWAE dual-supplier architecture |
LONGWELL has supplied EC fan platforms to multiple Tier-III and Tier-IV customers. All FanWall arrays have passed customer-witnessed N+1 switchover and failure-simulation testing.
Modern data center cooling is a four-layer system
Each layer has different fan requirements, and the right product choice for each layer determines whether the overall system meets PUE and Tier targets. LONGWELL's portfolio covers all four layers with engineered products.
Rack-Level Cooling
Server-internal + rack rear-door
Small DC axial fans (40-200 mm) inside servers + rack rear-door exhaust fans on 12V/48V DC bus.
In-Room Precision AC
CRAH / CRAC
LWBE3G backward-curved Plug Fan + FanWall arrays.
Outdoor Condenser Unit
Heat rejection
LWAE3G axial EC, 500-710 mm, IP55 standard.
Cooling Tower / Dry Cooler
Hyperscale heat rejection
LWAE3G large axial — 710 / 800 / 910 / 1000 mm Cube Housing.
Product Selection · LWBE3G + LWAE3G
Exact fan configuration for every DC cooling subsystem, matched to Tier classification, PUE target, and certification matrix.
L2 · CRAH / CRAC Selection — LWBE3G Plug Fan
CRAH internal fans require backward-curved EC technology for high static pressure at high efficiency simultaneously. LWBE3G Plug Fan eliminates scroll housing impedance and enables FanWall arrays with N+1 redundancy.
| CRAH Capacity | Size | Array Config | Total Airflow | Total Power |
|---|---|---|---|---|
| 30 kW (Tier 2 small) | LWBE3G-400 Plug | 2×2 = 4 fans | 18,000-39,000 m³/h | 3.4-6.6 kW |
| 60 kW (Tier 3 medium) | LWBE3G-450 Plug | 2×3 = 6 fans N+1 | 34,800-75,000 m³/h | 6.6-13.2 kW |
| 100 kW (Tier 3 large) | LWBE3G-500 Plug | 2×4 = 8 fans N+1 | 60,000-128,000 m³/h | 12.0-24.0 kW |
| 150 kW (Tier 4 critical) | LWBE3G-500 Plug | 3×3 = 9 fans N+1 | 67,500-144,000 m³/h | 13.5-27.0 kW |
▸ Verified BMS / Monitoring System Compatibility (Schneider · JCI · Honeywell · Vertiv · Huawei)
| Schneider EcoStruxure | ✓ Verified | Both Modbus RTU and BACnet MS-TP protocols tested |
| Johnson Controls Metasys | ✓ Verified | BACnet MS-TP compatible |
| Honeywell Enterprise BMS | ✓ Verified | Modbus RTU compatible |
| Vertiv Liebert iCOM | ✓ Verified | Integrated with Liebert CRAH equipment |
| Huawei FusionDC | ✓ Verified | Jointly tested with China-market customers |
L3 · Outdoor Condenser Selection — LWAE3G Axial EC
IP55 standard, EMC Class B, Modbus integration. Optional bearing vibration sensors for predictive maintenance.
| Condenser Capacity | Size | Array Config | Total Airflow | Application |
|---|---|---|---|---|
| 30 kW | LWAE3G-500 | 2-4 fans | 18,400-51,200 m³/h | Tier 2 / small-medium CRAC |
| 75 kW | LWAE3G-560 | 4-6 fans | 48,000-99,000 m³/h | Tier 3 / medium CRAH |
| 150 kW | LWAE3G-630 | 6-10 fans | 93,000-210,000 m³/h | Tier 3 / large CRAH |
| 300 kW | LWAE3G-710 | 8-16 fans | 156,000-400,000 m³/h | Tier 4 / critical CRAH |
L4 · Cooling Tower Selection — LWAE3G Large Format
The largest fans in the data center cooling architecture — typically Ø 710-1000 mm. LWAE3G top four sizes cover the full hyperscale range. Cube Housing standard, UV / chemical / coastal protection.
| Tower Capacity | Size | Array Config | Total Airflow | DC Scale |
|---|---|---|---|---|
| 500 kW (single module) | LWAE3G-710 | 4 fans | 78,000-100,000 m³/h | 5 MW DC |
| 1 MW (single module) | LWAE3G-800 | 6 fans | 138,000-171,000 m³/h | 10 MW DC |
| 2 MW (single module) | LWAE3G-910 | 8 fans | 212,000-244,000 m³/h | 30 MW DC |
| 4 MW (single module) | LWAE3G-1000 | 12-16 fans | 348,000-512,000 m³/h | Hyperscale 100MW+ |
Typical 30 MW Data Center LONGWELL Configuration
One supplier covering L2 / L3 / L4 — 160 fans, 219 kW total. Same commercial team, engineering team, service team, and spare parts library — saving USD 117,000+/year in energy vs mixed-vendor baseline, USD 1.4M+ over 10 years.
Basis: 30 MW DC, 8,760 h/yr continuous, $0.12/kWh commercial electricity, 80% PUE fan-attributable.
| Layer | Model | Form Factor | Quantity | Unit Power |
|---|---|---|---|---|
| L2 | LWBE3G-450 EC | Plug Fan | 80 (10 CRAH × 8) | 1.2 kW |
| L3 | LWAE3G-630 EC | Mounting Ring | 48 (6 × 8) | 1.1 kW |
| L4 | LWAE3G-910 EC | Cube Housing | 32 (4 × 8) | 2.2 kW |
| Total | 160 fans | 219 kW | ||
Data Center-Relevant Certifications
Full LONGWELL certification inventory relevant to data center cooling OEMs. All certificates held by LONGWELL; original PDFs on request. Gold-marked items are most heavily weighted in DC customer audits.
| Certification | Standard | Coverage |
|---|---|---|
| CE | EU Marking · Machinery / EMC / LVD | LWBE3G + LWAE3G full range |
| EMC Class B ★ | EN 55014-1 / EN 55014-2 Class B | Full EC platform · strictest IT grade |
| FCC ★ | FCC Part 15 Class B | Full EC platform · US IT EMC |
| UL | UL 507 (fan) + UL 1004-1 (motor) | LWBE3G 6 NA sizes + LWAE3G 4 NA sizes |
| ETL | Intertek mark, US/Canada NRTL | North American DC mainstream sizes |
| CCC | China Compulsory Certification | China-market DC models |
| RoHS / REACH | EU 2011/65/EU + (EC) 1907/2006 | Full LWBE / LWAE |
| ErP Tier 2 ★ | EU Energy-related Products · EED mandated | Full EC platform |
| AMCA 210 | AMCA 210-16 Performance Standard | Equivalent T3 evidence available |
| ISO 9001 / 14001 / 45001 | Quality + Environment + Safety | ✓ Certified |
DC Test Report Library
T1 = PDF available within 1 business day; T2 = scheduled at named lab with confirmed delivery date. T1-T3 services complimentary for project-intent customers.
| Test Type | Standard | Models | Status |
|---|---|---|---|
| CRAH-condition P-Q Curves | AMCA 210-16 / ISO 5801 | LWBE3G-400/450/500 | ✓ T1 Ready |
| Condenser-condition P-Q Curves | AMCA 210-16 / ISO 5801 | LWAE3G-500/560/630/710 | ✓ T1 Ready |
| FanWall Array Synchronization | LONGWELL Spec / Modbus | LWBE3G-450 2×2/2×3/2×4 | ✓ T1 Ready |
| Acoustic — CRAH Room | ISO 3744 / ISO 13347 | LWBE3G + LWAE3G mainstream | ✓ T1 Ready |
| EMC IT-Environment Verification | EN 55014 Class B + FCC Class B | Full EC platform | ✓ T1 Ready |
| Failover Switching Verification | LONGWELL / IEC 61508 | FanWall array configs | ✓ T1 Ready |
| MTBF Life Verification | ISO 281 + accelerated aging | DC priority models | ✓ T1 Ready |
| BMS Interoperability | BACnet International BTL | LWBE3G EC BACnet variant | ◐ T2 Scheduled 2026 Q3 |
Top-3 Global Precision Cooling OEM
Publicly listed top-3 global precision cooling (CRAC/CRAH) OEM. Annual revenue exceeding USD 3B. Presence in 60+ countries. Name disclosable under separate NDA. Data verified by LONGWELL PMO and confirmed by customer's procurement team.
Project Context & Pressures · Q4 2024
- AI compute demand shock — North American hyperscale customers began large-scale deployment of H100/B200 AI training racks. Rack heat density jumped from 15 kW to 60-100 kW; existing CRAH fan configuration severely undersized.
- Internal PUE ≤ 1.3 commitment — Product committee committed all 2025+ CRAH platforms to PUE ≤ 1.3. Existing AC + scroll could not meet it; switching to EC + Plug FanWall was mandatory.
- Incumbent supplier timeline collapse — European brand quoted 14-month development + 6-month mass production. Customer would miss its Q2 2025 product launch window entirely.
LONGWELL 90-Day NPI Timeline
| Window | Milestone | Actions |
|---|---|---|
| 2024-11-04 | Day 1: Spec Lock | Customer engineering team visited LONGWELL HQ; 4-platform spec review + risk assessment sign-off |
| 2024-11-25 | Day 21: CFD Done | Whole-unit CFD for all 4 CRAH platforms + performance prediction reports; engineering review passed |
| 2024-12-09 | Day 35: Prototypes | 12 engineering prototypes (3 per platform) delivered; customer factory DV initiated |
| 2025-01-13 | Day 70: DV/PV Pass | All 4 platforms passed DV/PV first-attempt; customer technical release granted |
| 2025-02-03 | Day 90: MP Release | Mass production process archived; customer's first 1,500-unit PO issued |
Technical & Commercial Outcomes
| Metric | Required | Achieved |
|---|---|---|
| CRAH System PUE Contribution | ≤ 1.30 | 1.28 |
| Fan Efficiency Improvement (vs prior AC + scroll) | ≥ 30% | 38% |
| Noise Reduction | ≥ 4 dB(A) | 6.5 dB(A) |
| DV/PV Pass Rate | ≥ 95% | 100% first-attempt |
| MTBF (Q2 2025 – Q1 2026 measured) | ≥ 50,000h @ 40°C | Zero field failures |
| 2025 full-year production | — | 80,000+ units |
| Frame agreement | — | 2025-2027, 60,000 min/yr |
DC-Specific Engineering Toolset
LONGWELL provides the engineering tools and resources DC OEM teams need to integrate LWBE3G + LWAE3G efficiently — augmented with DC-specific selection charts, FanWall layout guides, and reference BOMs.
| Tool | Purpose | Access |
|---|---|---|
| LONGWELLBUS Selector | Input CRAH / condenser / cooling tower operating point; returns 2-3 matching solutions with full P-Q-η curves, noise predictions, energy comparisons | Free download |
| Whole-Unit CFD Simulation | Customer uploads geometry → LONGWELL simulates duct impedance, fan operating point, noise prediction, airflow uniformity | Free for project-intent |
| 3D CAD Library (DC Set) | LWBE3G Plug Fan + LWAE3G Mounting Ring / Cube Housing — full STEP/IGES/Parasolid | Available after NDA |
| BMS Register Map Library | Full Modbus RTU + BACnet MS-TP register tables + validated configs for Schneider / JCI / Honeywell / Vertiv | Available after NDA |
| FanWall Layout Design Guide | 2×2 to 3×3 array layouts / spacing / duct design / master controller config · 12 LONGWELL-validated reference designs | Project-intent on request |
| PUE Optimization Calculator | Excel: input DC scale + current AC config → computed PUE improvement, energy savings, payback period | Free |
Field Application Engineering
For strategic DC customers, LONGWELL provides on-site Field Application Engineering: 1-4 week deployment at customer facility for first-prototype CRAH/condenser/tower integration, DV/PV witness, and mass production transition. Local engineers available from EU / NA / Middle East offices.
DC Customer 90-Day NPI Process
If standard configurations don't fully match your DC platform requirements, LONGWELL offers the same 90-day NPI cycle that delivered the flagship case in §4 — structured, predictable, and validated across multiple top-tier customers.
| Stage | Engineering Actions | Customer Involvement |
|---|---|---|
| S1 · Day 1-14 Spec Lock | DC operating point + BMS integration requirements + certification matrix + timing | Provide: CRAH/condenser/tower operating points + Tier classification + production window · 1-2 conference calls |
| S2 · Day 15-45 Design | Whole-unit CFD + FanWall layout + 3D structure + communication register mapping | LONGWELL leads. Customer receives CFD / layout / 3D / BMS interface docs · one technical review |
| S3 · Day 46-70 Prototype | Engineering prototypes + customer factory integration + DV | 3-12 prototypes; LONGWELL application engineers on-site for DV support; BMS integration debug |
| S4 · Day 71-90 Release | DV/PV completion + mass production archived + first order delivery | DV/PV verification; 48h closed-loop on engineering issues; first order 100-1500 units |
Commercial Terms
NRE Charge
USD 8,000-25,000 depending on complexity; 50% credited against first mass production order; Tier-1 negotiable.
Sample Fee
USD 200-800 per unit by size; 100% credited against mass production order.
IP Ownership
Customer-specific design IP belongs to customer exclusively; LONGWELL platform IP remains with LONGWELL.
First Order MOQ
100-1500 units scaling with CRAH platform size; subsequent orders aligned with customer production schedule.
Lead Time & Reliability Commitments
| Commitment | Terms |
|---|---|
| Standard Model — Stock | 1-3 days · DC mainstream models stocked ≥ 200 units |
| Standard Model — MTO | 15-30 days · 100-500 units MOQ |
| Custom Model (post-NPI) | 30-45 days |
| Standard Warranty | 12 months from customer factory receipt date |
| Extended Warranty (DC) | 18-36 months, negotiable per frame agreement |
| MTBF Commitment | 60,000h @ 40°C; real DC environments at 22-25°C achieve longer MTBF |
| 8D Closed-Loop Response | 24h acknowledgment → 5 business day root cause → 15 business day corrective action |
| Field Support | Serious quality events: LONGWELL engineer on-site within 48 hours |
| Spare Parts Guarantee | Frame customers: ≥ 5% of annual volume as regional spare parts inventory |
Three Engagement Paths
Three ways to move from this brochure to a working partnership. Pick the one that fits your current DC project stage.
Quick DC Engineering Review
Send DC engineering parameters (CRAH capacity / condenser scale / cooling tower configuration). Receive a complete LWBE + LWAE configuration proposal with performance predictions and pricing within 48 hours.
Whole-Unit CFD + Technical Review
Sign NDA → provide whole-unit geometry → LONGWELL engineering team completes CFD simulation + FanWall layout + performance predictions → on-site technical review at your factory.
Custom 90-Day NPI Kickoff
Sign NDA → detailed requirement review → 90-day custom NPI kickoff → on-site Field Application Engineering deployment (for strategic customers).
Get in Touch
One supplier. Three layers. AI-era ready.
Engineered for Tier-3 and Tier-4 data centers. Powering PUE ≤ 1.3 cooling at AI rack densities. From CRAH to cooling tower, all in one engineered platform.