SINCE 1990
Deliver air toward the rear
The evaporator fan drives cooled air into the upper chute, which carries it toward the back of the trailer. A clear supply path helps the cooling air reach beyond the front rows.
Industry Solution Pack · EN V1.0 · 2026-05
F-Gas Era
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.
5 apps
Single-Supplier Coverage
Storage · Retail · Transport · Process · Beverage
R744 / R290
F-Gas 2024 Ready
EU 2027 mandatory transition
-40°C
Deep-Freeze Validated
Industrial CS + pharmaceutical mRNA
30,000+
Units / Year
EU + NA + China cold chain OEM
Why LONGWELL for Cold Chain
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.
①
F-Gas R744 (CO2) Retrofit
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.
②
5-Application Single Supplier
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%.
③
Fans + Controller Integrated
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%.
④
China Cold Chain Belt
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.
A Letter from the Founder
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.
Bruce Li
Founder & CEO, LONGWELL · bruce@zjlongwell.com
§1 · Why Cold Chain is LONGWELL's Next Strategic Battlefield
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. |
Key Engineering Conclusion
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.
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.
§1 · Five Core Application Dimensions
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.
Application principle · Refrigerated transport airflow
Why Loading Can Block a Refrigerated Trailer’s Airflow
A refrigerated trailer's fan can keep turning while the rear cargo receives too little cold air. In this top-supply design, loading must preserve the entire outward and return route.
Inside the equipment01 02 03 04
Follow the air through the process
Leave a way back
Air returns around the load and through the floor channels to the refrigeration unit's return opening. That opening completes the circuit; it is not spare cargo space.
Loading can break the circuit
Watch a pallet cover the lower return path. Circulation around the cargo weakens even though the fan runs. Cargo stacked into the upper supply path can also prevent cold air reaching the far end.
Prevent a short trip
A damaged chute or an open shortcut near the unit lets air return before serving distant cargo. Check actual loading height, clearances and the return bulkhead against the trailer's specified arrangement.
Airflow function
- At the refrigeration unit evaporator, driving the top-supply chute and return path around the loaded cargo.
- An axial family can be considered for an evaporator with a suitable direct air path. The coil and loaded return route determine the useful airflow; cargo clearance remains part of the equipment design.
What can change the result
- Cargo blocks the upper supply path.
- A pallet or debris blocks the floor or return inlet.
- A damaged chute allows a near-unit shortcut.
Operating requirements
Start with the complete air path
Share your layout and the information you already have. Unknown values can be identified before a configuration is selected.
01Top-supply and return layout
02Loaded evaporator airflow
03Coil, guard and return pressure loss
04Available fan envelope
05Low-temperature and moisture duty
06Vehicle supply and assembly requirements
LONGWELL fan options
Match the fan to this air path
Evaluate a LONGWELL axial fan family using the evaporator airflow, installed pressure loss and available space. Confirm low-temperature, moisture, supply voltage and complete transport-assembly requirements.
Where it sits
At the refrigeration unit evaporator, driving the top-supply chute and return path around the loaded cargo.
Why consider this configuration
An axial family can be considered for an evaporator with a suitable direct air path. The coil and loaded return route determine the useful airflow; cargo clearance remains part of the equipment design.
Check the result in your equipment
Verify rear delivery and return airflow with the actual load, chute and bulkhead in place.
Confirm the selected fan operating point using the complete installed air-path resistance.
Confirm mounting, supply and controls with LONGWELL before integrating the selected assembly.
Discuss your trailer evaporator airflow
Send top-supply and return layout, loaded evaporator airflow, coil, guard and return pressure loss, available fan envelope, low-temperature and moisture duty, vehicle supply and assembly requirements. Ask LONGWELL to review a suitable configuration, fan curve, drawing and control details. A layout or existing fan model can start the review.
A layout, installation photos or your existing model is enough to start the discussion.
Engineering references
①
Cold Storage
Cold Storage
Cold Storage Warehouse
2°C to -25°C · RH 90% · -40°C deep-freeze optional
EC Axial + BC EC + AHU Plug Fan · Condenser + Evaporator + AHU
②
Supermarket Cabinet
Supermarket Cabinet
Supermarket Refrigeration
0-4°C / -18°C · ≤ 45 dB retail-grade
EC Axial + Cross Flow + DC Cooling · Condenser + Curtain + Internal
③
Cold Chain Transport
Cold Chain Transport
Truck + Reefer
-30°C to +50°C · IEC 60068 vibration 5g
DC Axial Fan 12V/24V · Vehicle + maritime reefer
④
Industrial Process
Industrial Process
Process Refrigeration
-40°C · NH3/CO2 refrigerant · food-grade
Anti-corrosion + EC Axial (304/316L SS) · Chemical + seafood
⑤
Beverage / Vending
Beverage / Vending
Beverage Coolers
4-8°C · ≤ 30 dB retail-grade · compact
EC Cross Flow + DC Cooling (compact) · Curtain + internal condenser
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%.
§2 · Product Mapping · 6 Fans + Temperature Controller
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.
System Integration · 10,000 m² Cold Storage BOM
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.
Legacy SFP (AC + HFC)
D Grade
EC + R744 (LONGWELL)
A+ Grade
| 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 | |
§4 · Certifications & Test Reports
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 |
§4 · Three Flagship Customer Cases
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.
★ CASE 1 · EU SUPERMARKET CHAIN F-GAS R744 RETROFIT · 18,000 UNITS
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 |
"LONGWELL was the only supplier that delivered R744-validated EC fans at 35% lower cost than European competitors and with 8-month shorter lead time. The night-mode noise data 39.8 dB convinced our neighborhood-compliance team immediately. We now treat LONGWELL as our default for the 2,800-store retrofit program."
— Group Refrigeration Director, Top-3 EU Supermarket Chain (disclosable after NDA)
★ CASE 2 · NORTH AMERICA COLD CHAIN LOGISTICS DC · 8,500 UNITS + 12 AHU
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 |
★ CASE 3 · CHINA QINGDAO SEAFOOD NH3 INDUSTRIAL · 144 FANS + 6 AHU
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.
§5 · Engineering Support
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.
90-Day Custom NPI + Reliability
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 |
§6 · How to Engage
Select a model for this applicationLONGWELL Fan Selector — every model with its catalogue curve, datasheet and drawing. No login.
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.
A
Tier-1 OEM Joint R&D
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.
⏱ Strategic customers · 3-year rolling R&D
Launch Joint R&D →
B
Mid-Tier F-Gas Retrofit
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.
⏱ EU customers priority · 36-month window
Request R744 Assessment →
C
Commercial Cold Chain EPC
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.
⏱ 2-3 weeks BOM design · After NDA
Request EPC BOM →
D
Industrial NH3 / EHEDG
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.
⏱ Process review 4-6 weeks · NH3 safety training
Request Process Review →
Dedicated Cold Chain Contact
Cold Chain Contact Channels
International Sales Hub
sales@longwellfans.com
Mark subject as "Cold Chain" for expedited routing
Headquarters
www.longwellfans.com
100 Xuhe Road, Ditang Street, Yuyao, Ningbo, Zhejiang, China 315400
6 Fans + Temperature Controller
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.