SINCE 1990
F-Gas Era
Cold Chain One-Stop Fan Platform
A single supplier across 5 applications for the mandatory R744 / R290 transition under EU F-Gas 2024 — EC Axial / Backward Curved EC / DC Axial / Anti-corrosion / EC Cross Flow / AHU Plug Fan. Cold storage · supermarket · transport · industrial process · beverage, all sourced from one channel.
Why Cold Chain Customers Choose LONGWELL
Cold chain is the invisible food infrastructure — and fans determine efficiency and temperature uniformity. LONGWELL delivers four unique advantages in the cold chain market that European competitors (Ebmpapst, Ziehl-Abegg, Rosenberg) and other Chinese suppliers struggle to match simultaneously.
F-Gas R744 Retrofit Engineering Capability
EU F-Gas 2024 regulation mandates a full HFC ban in commercial refrigeration by 2027, requiring customers to redesign condenser fans within 36 months to support R744 (CO2) at 100-120 bar + +135°C. LONGWELL EC Axial Fan is already R744-validated.
5-App Single Supplier + Unified Modbus
Cold storage + supermarket + transport + industrial + beverage cabinets — all sourced from a single LONGWELL channel, with EC platforms sharing one Modbus register map. Anti-corrosion and standard versions share 100% interface compatibility, simplifying BOM spare parts by 60%.
Fan + Temperature Controller Integrated
LONGWELL also supplies Temperature Controllers within the HVACR Components category — customers source the complete fan + controller package from a single supplier, simplifying BOM by 30% and reducing integration commissioning time by 40%.
China Cold Chain Expansion Window
China cold chain is expanding 3x in 5 years — JD Logistics / SF Express / Walmart China / Sam's Club / Yonghui / Hema synchronously driving a ¥100B domestic cold chain equipment investment for 2025-2028. LONGWELL's Ningbo manufacturing base delivers locally in 2-3 weeks vs 6-8 weeks for European ocean freight.
To Our Cold Chain Partners
To cold chain engineering, procurement, and operations leaders:
Cold chain is the invisible food infrastructure — and fans determine efficiency and temperature uniformity. The global cold chain market was €350B in 2024 and is projected to reach €570B by 2030 (CAGR 8.5%). Three drivers push LONGWELL into this battlefield: EU F-Gas 2024 mandating R744 / R290 to replace HFC, commercial refrigeration ErP Lot 12 reweighted scoring, and China cold chain network expanding 3x in 5 years.
This is exactly LONGWELL's positioning. We are not a generic HVAC fan supplier that "happens to serve cold chain" — we are an end-to-end EC platform engineered specifically for cold chain duty cycles: R744 high-pressure validated, -40°C deep-freeze cold start, 5g vehicle vibration, 316L NH3 corrosion protection, ≤ 32 dB retail-grade silent, fan + Temperature Controller integrated delivery. 6 engineered products plus HVACR Components Temperature Controller, covering cold storage · supermarket · transport · industrial · beverage — five major applications.
This Pack documents our solution and engagement model. §1 outlines the 5-app architecture; §2-§3 map the 6 products to specific cold chain sub-scenarios; §4 presents anonymized customer evidence (an EU supermarket chain 18,000-unit R744 retrofit, a NA cold chain logistics IRA-window project, a Shandong seafood NH3 industrial cold chain); §5 and §6 cover engineering tools, commercial terms, and engagement paths.
Cold Chain Battlefield · Three Drivers
The global cold chain market was €350B in 2024, projected to reach €570B by 2030 (CAGR 8.5%). Three converging policy / market windows open LONGWELL's entry — all time-limited, with positioning required before 2027.
| Driver | Policy / Market Window | Engineering Implication for Customers |
|---|---|---|
| ① EU F-Gas 2024 | 2027 Mandatory HFC Ban | Commercial refrigeration must redesign condenser fans within 36 months to support R744 (CO2) at 100-120 bar + +135°C discharge temperature. R404A / R134a fully retired. |
| ② ErP Lot 12 Reweighted Scoring | EU 2019/2024 commercial refrigeration | Fan SFP accounts for 18-25% of overall efficiency rating. Choosing the wrong fan downgrades cabinet rating from B to D. EC IE4+ is the A-grade admission ticket. |
| ③ China Cold Chain Expansion | 2025-2028 ¥100B Investment | JD Logistics / SF Express / Walmart China / Sam's Club / Yonghui / Hema simultaneously driving an equipment upgrade wave, with cold chain network expanding 3x in 5 years. |
For installed HFC refrigeration systems, EC + R744 fans are no longer "nice to have" — they are "mandatory by 2027". The original EC fans from Hussmann / AHT / Carrier Commercial were designed for HFC and do not support R744 100-120 bar high pressure. Customers must complete re-selection + third-party testing + mass-production replacement within 36 months.
Cold Chain 5 Application Dimensions
Each cold chain application has distinct temperature, pressure, refrigerant, and certification requirements. LONGWELL maps a purpose-engineered fan series to each application — all named per official longwellfans.com product categories.
Cold Storage
Cold Storage Warehouse
2°C to -25°C · RH 90% · -40°C deep-freeze optional
Supermarket Cabinet
Supermarket Refrigeration
0-4°C / -18°C · ≤ 45 dB retail-grade
Cold Chain Transport
Truck + Reefer
-30°C to +50°C · IEC 60068 vibration 5g
Industrial Process
Process Refrigeration
-40°C · NH3/CO2 refrigerant · food-grade
Beverage / Vending
Beverage Coolers
4-8°C · ≤ 30 dB retail-grade · compact
One-Stop Value
Customers benefit from sourcing the entire required cold chain fan capability from a single LONGWELL supplier: (1) all EC platforms share the same Modbus register map — customer main control integrates once and is compatible across all 5 applications; (2) Anti-corrosion and standard versions share 100% interface dimensions — seafood / chemical cold chain co-produces with supermarket cabinets on the same line; (3) DC Axial Fan 12V/24V vehicle variant uses the same manufacturing process as supermarket EC Axial, unifying suppliers across transport + warehouse + retail; (4) LONGWELL also supplies Temperature Controllers (HVACR Components category), delivering fan + controller as an integrated package — simplifying customer BOM by 30%.
6-Product Cold Chain Architecture Overview
Precise product matching for each cold chain application, all named per official longwellfans.com product categories — paired with refrigerant, operating conditions, and certification matrices.
| Product | Applications | Engineering Role |
|---|---|---|
| EC Axial Fan ★ | ①+②+④ | Condenser flagship · Ø 350-910 mm · R744 high-pressure validated · LWAE3G sub-series |
| Backward Curved EC Fans | ①+④ | Cold storage evaporator + process refrigeration · -40°C low-temp grease · LWBE3G sub-series |
| DC Axial Fan | ③ | Cold chain transport dedicated · 12V/24V · vibration 5g + vehicle EMC · J1939 CAN |
| Anti-corrosion Centrifugal Fan | ④ | NH3 / CO2 / seafood / pharma · 316L SS · EHEDG + NSF food-grade |
| EC Cross Flow Fan | ②+⑤ | Supermarket curtain + beverage cooler · ≤ 32 dB retail-grade · Ø 60-100 × 600-1200 |
| AHU Plug Fan | ① | Large cold storage + logistics center · FanGrid N+1 · BACnet integration |
EC Axial Fan ★ · Cold Chain Condenser Flagship
From supermarket condensing units to industrial NH3 cold storage, EC Axial Fan is LONGWELL's core platform on the cold chain condenser side. Ø 500-630 mm is the supermarket mainstream, with the LWAE3G-500 certified for R744 (CO2) high-pressure operation.
| Size | Airflow | Static Pressure | Power | Typical Application |
|---|---|---|---|---|
| Ø 400 (LWAE3G-400) | 4,500 m³/h | 120 Pa | 0.35 kW | Supermarket condensing unit 5-8 kW |
| Ø 500 (LWAE3G-500) ★ | 7,800 m³/h | 150 Pa | 0.65 kW | Supermarket + medium cold storage · R744 certified |
| Ø 630 (LWAE3G-630) | 14,500 m³/h | 200 Pa | 1.6 kW | Large cold storage + logistics center |
| Ø 800 (LWAE3G-800) | 22,000 m³/h | 250 Pa | 2.8 kW | Industrial condenser + large warehouse |
▸ EC Axial Fan Cold Chain Engineering Specifications
| Impeller | Sickle-shape blade (5-9 vanes) + glass-fiber reinforced PA66 (-40°C low-temp rated), CFD-optimized noise + G2.5 dynamic balance |
| Motor | EC external rotor, IE4+ efficiency, integrated driver board, 0-10V/PWM/Modbus RTU/CAN multi-protocol |
| Size Range | Ø 350 / 400 / 450 / 500 / 560 / 630 / 710 / 800 / 910 mm |
| R744 High-Pressure | ✓ CO2 refrigerant 100-120 bar + +135°C short-term / +90°C continuous · EU F-Gas 2024 Ready |
| Operating Temperature | -40°C to +55°C standard · -50°C deep-freeze optional (ultra-low temp grease + electronics pre-heat) |
| Ingress Protection | IP54 standard · IP65 cold storage environment · IP67 high-humidity / chemical cold chain optional |
| Noise Lp | ≤ 48 dB(A) @ 1m supermarket night mode · ≤ 38 dB(A) retail-grade ultra-quiet |
| ErP Lot 12 | Commercial refrigeration A-grade supported · AHRI 1250 NA commercial refrigeration |
Backward Curved EC Fans · Cold Storage Evaporator + Process Refrigeration
LWBE3G sub-series. Cold storage evaporator fans operate at -25°C to -40°C — shipping with Klüber Isoflex Topas NB 52 ultra-low temp grease (-50°C rated), with starting torque at -40°C only 30% higher than ambient.
| Dimension | Cold Storage Evaporator | Process Refrigeration / Large AHU |
|---|---|---|
| Typical Size | Ø 250 / 310 / 355 mm | Ø 400 / 450 / 500 mm |
| Airflow | 1,500 - 6,500 m³/h | 6,000 - 15,000 m³/h |
| Static Pressure | 300 - 600 Pa | 600 - 1,200 Pa |
| Low-Temp Operating | -40°C to +10°C standard | -30°C to +50°C |
| Control Interface | Modbus RTU + 0-10V + defrost coordination | Modbus RTU + BACnet MS/TP |
DC Axial Fan · Cold Chain Transport Dedicated 12V/24V
Dedicated to refrigerated trucks (300L-30T) + maritime 40-ft reefer + last-mile electric delivery vehicles. IEC 60068 vibration 5g + CISPR 25 Class 5 + J1939 CAN — compatible with Carrier Transicold / Thermo King systems.
| Specification | Parameter |
|---|---|
| Voltage Platform | 12V DC (light) · 24V DC (heavy truck / maritime) · 48V (electric cold chain · Tesla Semi / BYD K9) |
| Size Range | Ø 200 / 250 / 280 / 305 / 350 mm (vehicle mainstream Ø 280-305 mm) |
| Vibration Rating | IEC 60068-2-6 vibration 5g (10-500 Hz full spectrum) + shock 50g |
| Vehicle EMC | ISO 7637-2 transient immunity + CISPR 25 Class 5 + UN ECE R10 |
| Speed Control | PWM 5-95% + J1939 CAN bus interoperability |
| MTBF | 60,000 hours (vehicle 8-year service life match) |
Anti-corrosion Centrifugal Fan · NH3 / CO2 Industrial Corrosion Protection
3-level protection architecture — coating + material (304/316L SS) + IP67 fully-sealed motor. ISO 9227 neutral salt spray 720h (standard) / 1,200h (deep-sea / NH3 / chemical). Optional NSF H1 food-grade lubricant + EHEDG easy-clean structure.
EC Cross Flow Fan + AHU Plug Fan
EC Cross Flow serves supermarket open-front cabinet air curtains (≤ 32 dB retail-grade) + beverage cooler internal condensers; AHU Plug Fan serves large cold storage (10,000 m²+) centralized air handling, with FanGrid 2×2 / 2×3 / 3×3 N+1 fault-tolerant arrays — single-unit failure raises cold storage temperature only 1-2°C.
Typical 10,000 m² Cold Storage LONGWELL Configuration
One supplier covering condenser / evaporator / AHU layers, with optional Temperature Controller integrated delivery. The same commercial team + engineering team + service team + spare parts library — simplifying customer BOM by 30% and reducing integration commissioning time by 40%.
Basis: 10,000 m² cold storage, Walmart China / JD Logistics reference configuration.
| Subsystem | LONGWELL Product | Quantity |
|---|---|---|
| Condenser (outdoor) | EC Axial Fan Ø 500-800 | 24-48 units · R744 high-pressure variant |
| Evaporator (in-storage) | Backward Curved EC Fans Ø 250-355 | 16-32 units · -40°C low-temp |
| AHU Air Handling | AHU Plug Fan Ø 450-1000 | 4-8 units · FanGrid N+1 |
| Temperature Control (Optional) | Temperature Controller · Modbus integrated commissioning | |
Cold Chain Product Certification Matrix
Certification coverage across all 6 fans + Temperature Controller. The regulatory framework required for EU + NA + APAC global deployment. Gold-highlighted items are most heavily weighted in cold chain customer audits.
| Certification | Standard | Applicable Products |
|---|---|---|
| CE / UKCA | EU Machinery / EMC / LVD + UK MCR | All 6 fans + Temperature Controller |
| ErP Lot 12 ★ | EU 2019/2024 commercial refrigeration Ecodesign reweighted | EC Axial + EC Cross Flow (supermarket mandatory) |
| EU F-Gas 2024 ★ | EU 2024/573 — R744 + R290 + R454C mandate | EC Axial Fan (R744 high-pressure validated) |
| AHRI 1250 / 1251 | North America commercial refrigeration / freezer performance | EC Axial + Backward Curved EC (NA) |
| ETL / UL 471 | North America electrical safety (commercial refrigeration / cabinets) | All fans + Temperature Controller (NA) |
| EHEDG | European Hygienic Engineering & Design Group (food contact easy-clean) | Anti-corr + BC EC (food processing / pharma) |
| NSF International H1 | Food-grade lubricant + food contact materials | EHEDG-paired food-grade variants |
| ISO 9227 NSS 720h/1200h | Neutral salt spray (seafood + chemical NH3 / CO2) | Anti-corrosion Centrifugal Fan |
| IEC 60068-2-6 / 2-27 | Vibration 5g + shock 50g (vehicle) | DC Axial Fan (vehicle / maritime) |
| ISO 7637-2 + CISPR 25 | Vehicle transient immunity + radiation EMC | DC Axial Fan (vehicle) |
| GB 23972 / GB 28999 | China commercial refrigeration + food cold chain mandatory standards | All fans (China market) |
| ISO 9001 / 14001 / 45001 | Quality + Environment + Occupational Safety | ✓ Certified |
Cold Chain Test Report Library
T1 = PDF delivered within 1 business day; T2 = scheduled at a named lab with confirmed delivery date. T1-T2 services complimentary for project-intent customers (after NDA signed or RFP issued).
| Report Type | Standard | Coverage | Status |
|---|---|---|---|
| ErP Lot 12 Commercial Refrigeration | EU 2019/2024 + AS/NZS | EC Axial + EC Cross Flow | ✓ T1 Ready |
| R744 (CO2) High-Pressure Validation | EN 378 + EU 2024/573 F-Gas | EC Axial Fan R744 variant | ✓ T1 Ready |
| -40°C Deep-Freeze Cold Start | IEC 60068-2-1 + Klüber low-temp | All EC fans (cold storage variant) | ✓ T1 Ready |
| AHRI 1250 / 1251 Performance | AHRI 1250-2024 + 1251-2024 | EC Axial Fan (NA market) | ✓ T1 Ready |
| IEC 60068 Vehicle Vibration 5g | IEC 60068-2-6 + 2-27 | DC Axial Fan | ✓ T1 Ready |
| CISPR 25 Class 5 Vehicle EMC | CISPR 25 + ISO 7637-2 | DC Axial Fan | ✓ T1 Ready |
| ISO 9227 Salt Spray 720h / 1,200h | ISO 9227 NSS + ASTM B117 | Anti-corrosion Centrifugal Fan | ✓ T1 Ready |
| Modbus + BACnet Protocol Interoperability | Modbus RTU + BACnet MS/TP | All EC fans + AHU Plug Fan | ✓ T1 Ready |
| 80,000 Start-Stop Cycle Life (Beverage) | Internal accelerated aging + Weibull | DC Cooling + Cross Flow | ✓ T1 Ready |
| EHEDG Food-Grade Easy-Clean | EHEDG Doc 8 + Doc 13 | Anti-corr + BC EC (food variant) | ◐ T2 Scheduled 2026 Q3 |
3 Flagship Customer Cases · 30,000+ Units in 18 Months Across 3 Continents
EU supermarket chain F-Gas R744 retrofit, North American cold chain logistics IRA window project, and Shandong seafood NH3 industrial cold chain — three cases that define LONGWELL's position in the cold chain market.
European Top-3 Supermarket Chain F-Gas R744 Retrofit
Customer is a Top-3 European supermarket chain with €30B+ annual revenue, operating 2,800 stores across 5 countries (DE/FR/IT/ES/UK), commercial refrigeration assets €1.2B. Name disclosable under separate NDA.
Project Context & Hard Requirements
- R744 High-Pressure Validation — fans must withstand 100-120 bar + +135°C short-term discharge temperature
- ErP Lot 12 A-Grade — upgrade from D-grade (legacy AC) to A-grade (EC IE4+), SFP reduction ≥ 30%
- Night Silent — outdoor condenser fan night mode Lw ≤ 42 dB (current 48 dB must drop another 6 dB)
- Volume + Delivery — 18,000 condenser units + 5,400 air curtain units, 12-month phased delivery
- Existing Line Compatibility — 100% interface compatibility with Hussmann / AHT cabinet enclosures, direct upgrade with no mechanical retrofit
LONGWELL Solution Core
EC Axial Fan LWAE3G-500 R744 high-pressure variant (new design with +135°C high-temp insulation + high-seal bearings) + EC Cross Flow Fan Ø 80×900 air curtain variant + 4-stage night silent modes. German TÜV Süd EN 378 + EU F-Gas third-party testing + 6-week joint acceptance at customer's Munich tech center (12 stores field-measured across 5 countries).
Technical Outcomes
| Metric | Required | Achieved |
|---|---|---|
| R744 high-pressure validation | 100-120 bar / +135°C | 125 bar / +138°C passed |
| ErP Lot 12 overall rating | D → A grade | A+ grade (exceeded) |
| Fan SFP reduction | ≥ 30% | 38.7% |
| Night noise Lw | ≤ 42 dB | 39.8 dB |
| Interface compatibility | 100% | 100% no mechanical retrofit |
| First 6,000-unit delivery | 16 weeks | 13 weeks ahead of schedule |
Commercial Outcomes
| Initial Contract | 18,000 EC Axial R744 + 5,400 Cross Flow + ErP Lot 12 certification support |
| 2026-2027 Rolling | Additional 35,000 units (including -40°C industrial variant), synchronized with 2,800-store renovation |
| Frame Agreement | 2025-2030 five-year preferred supplier, minimum 20,000 units/year guaranteed |
| Market Share Displacement | Outdoor condenser from competitors 100% → LONGWELL 70% + Ebmpapst/Ziehl-Abegg 30% dual-source |
| Cost Comparison | 35% lower than Ebmpapst R744 variant pricing + 8 months shorter lead time |
North American Cold Chain Logistics Distribution Center Retrofit
A US-based cold chain logistics distribution center operator running 24 nationwide DCs serving Walmart / Costco / Amazon Fresh / Whole Foods. Customer name disclosable under separate NDA. Project executed 2024-2025.
Project Context
Each DC 12,000-30,000 m² with 0-4°C chilled + -25°C frozen + loading dock buffer. In 2024 the customer launched a 6-DC simultaneous retrofit (120,000 m² total). Customer pain points: Carrier OEM component supplier 24-month lead time could not match the IRA investment tax credit window (the 30% credit requires operational completion); Bohn / Krack / Russell US-domestic OEMs would not accept orders below 10,000 units.
LONGWELL Solution
- Condenser fans: EC Axial Fan LWAE3G-630 / 800 × 5,600 units (24 DC × 24 units average)
- Evaporator fans: Backward Curved EC Fans (LWBE3G) Ø 310/355 × 2,900 units (-40°C low-temp grease)
- Large AHU: AHU Plug Fan 2×2 / 3×2 FanGrid array × 12 systems (main DC critical backup)
- AHRI 1250 + ETL + UL 471 certifications: completed in collaboration with Intertek
Project Outcomes
| Total units | 8,500 fan units + 12 AHU systems + complete Temperature Controller suite |
| Delivery duration | 8 months (customer required 12 months) — 4 months ahead |
| AHRI 1250 certification | First-pass certification (originally planned 2 rounds) |
| Cost vs Carrier OEM | 38% cost reduction + 16-month lead time advantage |
| IRA Rebate Lock-in | 6 DCs operational 4 months early, 30% investment tax credit secured |
| Follow-on | 2026 additional 18 DC retrofits (remaining 18/24), 5-year frame agreement |
Shandong Qingdao Seafood Export Cold Chain NH3 Industrial
A major Shandong Qingdao seafood processor with ¥3B annual export, primarily to Japan / Korea / US / Europe. New 50,000 m² cold chain industrial park — including -30°C industrial cold storage (20,000 m²) + -18°C commercial cold storage (15,000 m²) + quick-freeze line (15,000 m²). Customer name disclosable under separate NDA.
Project Special Challenges
- Coastal Location — 2 km from sea, high salt-spray environment
- NH3 (Ammonia) Industrial Refrigeration — fans require 316L SS + ammonia-resistant coating
- Dual Operating Conditions on Shared Line — -30°C / -18°C equipment co-produced, unified spare parts inventory required
- Export Certification — Japan / Korea / US markets require EHEDG + NSF food-grade certification
LONGWELL Solution
- Industrial condenser side: EC Axial Fan Ø 800-910 + Anti-corrosion 316L SS impeller + ammonia-resistant coating × 48 units
- Industrial evaporator side: Backward Curved EC Fans (LWBE3G) Ø 355 + Anti-corr 304 SS + food-grade lubricant × 72 units
- Quick-freeze IQF line: Anti-corrosion Centrifugal Fan 316L SS + EHEDG easy-clean × 24 units, -40°C quick-freeze
- AHU integration: AHU Plug Fan 3×3 FanGrid N+1 × 6 sets, BACnet + HACCP food safety monitoring
- Food-grade certification: complete EHEDG + NSF H1 documentation + Japan / Korea / US export qualification
Project Outcomes
| Total fan units | 144 fan pieces + 6 AHU systems + complete EHEDG + NSF certification documentation |
| Delivery duration | 4 months (customer required 6 months) — 2 months ahead |
| NH3 operating validation | 12 months operation, zero fan corrosion failures |
| ISO 9227 marine-grade | 1,200h NSS without pitting (validation report) |
| EHEDG + NSF | 100% food-grade first-pass certification, smooth export to Japan / Korea / US |
| Energy comparison | kWh/ton cold load reduced 24%, annual electricity savings ¥8.6M |
3-Case Summary · LONGWELL's Cold Chain Market Position
Three consistent patterns define LONGWELL's position in cold chain: (1) solving customer regulatory retrofit pain points (F-Gas R744 / IRA investment tax credit / China EHEDG export) — all time-limited policy windows; (2) integrated delivery capability (fans + Temperature Controller + certification support) simplifies customer BOM by 30% and reduces integration commissioning time by 40%; (3) dual cost + lead-time pressure — 35-38% lower than EU/US Tier-1 with 4-8 months shorter lead time.
Cold Chain Engineering Support
LONGWELL provides the engineering tools and resources cold chain OEM teams need to integrate the 6 products + Temperature Controller efficiently. All tools share Modbus register maps + CAD interfaces + F-Gas R744 retrofit modeling.
| Tool | Purpose | Access |
|---|---|---|
| ErP Lot 12 System Calculator | Input cabinet dimensions + operating conditions + refrigerant type → returns fan configuration + overall ErP rating (A+ / A / B / C / D) + upgrade path | Free |
| F-Gas R744 Retrofit Tool | Customer provides existing HFC cabinet spec → LONGWELL delivers R744 retrofit solution (pressure compensation + airflow adjustment + interface mating) | Free for EU customers |
| AHRI 1250 / 1251 Cert Support | NA customers entering AHRI 1250 commercial / 1251 cabinet certification: LONGWELL provides test data + Ningbo SGS pre-test + Intertek collaboration | Free for NA customers |
| EHEDG + NSF Food-Grade Cert | Food / seafood / pharma customers entering EHEDG + NSF H1 certification: LONGWELL provides Doc 8 / 13 documentation + third-party lab collaboration | Free for food-grade |
| Cold Storage CFD Service | Customer provides cold storage 3D model → LONGWELL delivers full-operating CFD + temperature uniformity prediction + fan layout optimization + defrost cycle simulation | Free for project-intent |
| 3D CAD Library + Interface Templates | 6-product STEP / IGES / Parasolid all sizes + R744 high-pressure variant + coastal corrosion variant + vehicle mount drawings | Available post-NDA |
| Modbus + BACnet Protocol Manual | LONGWELLBUS register tables + mainstream cold chain master controller (Carel / Danfoss / Eliwell) validation checklist | Available post-NDA |
Field Application Engineering
Tier-1 customers receive on-site Field Application Engineering: European engineers deploy 2-4 weeks at customer factories for ErP Lot 12 acceptance + F-Gas R744 retrofit commissioning + customer product engineer training. NA engineers serve US / Canada IRA / AHRI 1250 customers. China + APAC covered by Shanghai + Ningbo teams, with industrial cold chain projects receiving additional NH3 safety training + food GMP risk assessment.
Cold Chain 90-Day NPI Process
If standard configurations don't fully match your cold chain application, LONGWELL offers a structured 90-day custom NPI cycle — far faster than European competitors (Ebmpapst / Ziehl-Abegg standard NPI 12-24 months). R744 high-pressure validation adds 10-20 days.
| Stage | Engineering Actions | Customer Involvement |
|---|---|---|
| S1 · Day 1-14 Spec Lock | Application + temperature range + refrigerant + ErP / AHRI targets + regional market | Provide cabinet spec / refrigerant type (HFC / R744 / R290 / NH3) / target certifications / main controller brand · 1-2 conference calls |
| S2 · Day 15-45 CFD + Calculation | Cold storage / cabinet CFD + ErP Lot 12 system calculation + R744 high-pressure validation | LONGWELL leads; customer receives CFD simulation + overall ErP rating prediction + fan spec + R744 pressure validation report |
| S3 · Day 46-70 Sample + DV | Engineering samples + cabinet integration + DV | 3-5 samples + customer factory cabinet integration + joint -40°C cold-start validation + defrost coordination testing |
| S4 · Day 71-90 PV + Production | DV/PV + third-party certification + first order delivery | ErP Lot 12 / AHRI / EHEDG / NSF third-party testing + production process documentation + first batch order |
Pre-Shipment Reliability (Cold Chain Specific)
| Test Item | Terms |
|---|---|
| 100% In-Line Performance Test | Every unit: airflow / static pressure / RPM / current / vibration / noise / starting torque; data stored in MES linked to serial number |
| R744 100-bar Validation | R744 variant: every unit 100-bar pressure cycle test 50 cycles + EN 60335-2-89 EMC |
| -40°C Deep-Freeze Cold Start | Cold storage variant: every unit 100% -40°C cold-start tested + defrost program coordination verified; data included in shipping documentation |
| ISO 9227 Salt Spray Sample | Per Anti-corr batch: 2% sample × NSS 720h / 1,200h, customer receives test reports |
| Vehicle EMC (DC Axial) | Every DC Axial vehicle variant: ISO 7637-2 transient + CISPR 25 Class 5 radiation scan |
| L10 Accelerated Aging (Batch) | Per batch: 5 units × 2,000 h + 60°C accelerated aging, L10 = 80,000h @ 40°C (cold chain 10-year project cycle) |
Warranty Policy (Cold Chain Specific)
| Commitment | Terms |
|---|---|
| Standard Warranty | Cold chain applications start at 36 months (matches commercial refrigeration equipment 5-7 year service cycle) |
| Tier-1 OEM Extended Warranty | 60-84 months (matches cold chain equipment 8-10 year warranty policy) |
| MTBF Commitment | 80,000 hours @ 40°C (cold chain 8-10 year project cycle 24×7×365 operation) |
| Food Safety Emergency Response | Food / pharma customer cold storage failure: 24h emergency engineer + replacement fans air-shipped to site |
| 8D Field Response | 24h acknowledgment → 5 business-day root cause → 15 business-day corrective action + food / pharma emergency 48h engineer on-site |
4 Engagement Paths
Four paths from this Industry Solution Pack to a working partnership, matched by customer type: Tier-1 OEM / mid-tier OEM / commercial EPC / industrial cold chain EPC.
Tier-1 OEM Joint R&D
Sign NDA → provide cold chain specs + regional market + certification targets → LONGWELL completes ErP / R744 validation + CFD + fan customization → joint R&D launch + frame agreement.
Mid-Tier OEM F-Gas R744 Retrofit
Cabinet / cold storage OEMs facing EU 2027 mandatory HFC ban → sign NDA → existing HFC equipment spec assessment → LONGWELL R744 / R290 upgrade plan + ErP Lot 12 overall re-certification support.
Commercial Cold Chain EPC Package
Supermarket / logistics / retail EPC general contractors → sign NDA → project operating conditions review + design support → integrated condenser + evaporator + AHU + air curtain fan BOM + Temperature Controller package delivery.
Industrial Cold Chain EPC Project
Food / pharma / chemical / seafood EPC project owners → sign NDA → process review + NH3 / R744 / EHEDG assessment → industrial-grade fans + 316L SS + EHEDG / NSF food-grade certification complete package.
Cold Chain Contact Channels
Cold Inside. Efficient Outside. Built for the F-Gas Transition Era.
Single supplier across 5 applications · R744 / R290 / NH3 Ready · 90-day NPI · 35-38% lower price than European Tier-1 with 4-8 months shorter lead time.