Types of Ice Block Refrigerators
An ice block refrigerator is a cooling appliance that uses frozen water blocks to maintain low internal temperatures, making it ideal for food preservation in off-grid or energy-sensitive environments. These refrigerators are widely used in homes, commercial kitchens, outdoor events, and remote areas where consistent electricity is unavailable. Understanding the different types helps users choose the best model based on mobility, scale, and power needs.
Stationary Ice Block Refrigerator
Designed to remain in a fixed location, this refrigerator relies on pre-frozen ice blocks placed in a dedicated compartment to cool the interior. It maintains a consistently low temperature ideal for preserving perishable goods.
Advantages
- Stable and consistent cooling performance
- Energy-efficient (no continuous power required)
- Quiet operation with no mechanical compressor noise
- Ideal for long-term fresh food storage
Limitations
- Requires access to a freezer for ice block preparation
- Manual maintenance (replacing ice blocks)
- Limited portability due to fixed installation
Best for: Households, small grocery stores, clinics, and offices seeking reliable, low-energy cooling
Mobile Ice Block Refrigerator
A portable version of the stationary model, equipped with durable wheels and a robust handle for easy transportation. These units are engineered for temporary setups and on-the-go cooling needs.
Advantages
- Highly portable and easy to relocate
- Perfect for temporary or outdoor use
- Durable construction for frequent movement
- Maintains cold temperatures during transit
Limitations
- Slightly reduced insulation due to mobility design
- Wheels may wear over time with heavy use
- Requires careful handling to avoid tipping
Best for: Catering services, food trucks, outdoor events, farmers markets, and mobile clinics
Walk-in Ice Block Refrigerator
Large-scale refrigeration units designed for bulk storage, allowing personnel to walk inside for easy access. These systems use multiple ice block compartments to cool large air volumes and are built with industrial-grade insulation.
Advantages
- Massive storage capacity for commercial use
- Efficient temperature regulation over large spaces
- Reduces spoilage in high-volume operations
- Customizable shelving and layout options
Limitations
- High initial investment and space requirements
- Requires regular manual ice replacement
- Needs dedicated staff for maintenance
Best for: Wholesale distributors, large restaurants, hotels, and food processing facilities
Solar-Powered Ice Block Refrigerator
Equipped with photovoltaic panels, this eco-friendly refrigerator freezes water into ice blocks using solar energy. Excess energy is stored in batteries to ensure continuous operation day and night, even during cloudy periods.
Advantages
- Operates independently of the electrical grid
- Environmentally sustainable with zero emissions
- Ideal for remote or off-grid locations
- Reduces long-term energy costs
Limitations
- Higher upfront cost due to solar components
- Performance depends on sunlight availability
- Battery maintenance required for optimal function
Best for: Rural clinics, off-grid homes, disaster relief operations, and developing regions with unreliable power
| Type | Portability | Capacity | Energy Source | Best Application |
|---|---|---|---|---|
| Stationary | Low | Medium | Ice Blocks (Pre-frozen) | Homes, small businesses, clinics |
| Mobile | High | Small to Medium | Ice Blocks (Pre-frozen) | Events, catering, markets |
| Walk-in | None | Very Large | Ice Blocks + Optional Auxiliary Cooling | Commercial kitchens, warehouses |
| Solar-Powered | Low to Medium | Small to Large | Solar Energy + Battery Storage | Remote areas, off-grid facilities |
Expert Tip: For optimal performance, freeze ice blocks in clean, sealed containers to prevent contamination and ensure longer cooling duration. Consider using insulated covers during transport to minimize melting in mobile units.
Commercial Uses of Ice Block Refrigerators
Ice block refrigerators remain a vital solution in commercial settings where consistent, reliable, and often off-grid cooling is essential. These units use frozen water blocks to maintain low internal temperatures, offering a cost-effective and energy-efficient alternative to electric refrigeration—especially in areas with unreliable power or during emergencies. Their versatility makes them indispensable across various industries, from agriculture to healthcare.
Key Commercial Applications
Food Preservation
One of the primary uses of ice block refrigerators is the preservation of perishable food items such as meat, fish, and dairy products. The consistently low temperature significantly slows bacterial growth and enzymatic activity, delaying spoilage and extending shelf life.
This preservation capability reduces food waste and maintains product quality, making it ideal for markets, butcher shops, and small grocery stores—especially in regions where continuous refrigeration is not guaranteed.
Transportation of Perishables
Ice block refrigerators are commonly installed in delivery vehicles and transport containers to keep perishable goods cool during transit. Unlike electric units, they do not require constant power, making them reliable for long-distance hauls or rural deliveries.
They are particularly effective in cold chain logistics for seafood, fresh produce, and dairy, ensuring that products arrive at their destination in optimal condition without temperature fluctuations.
Remote Area Storage
In off-grid or rural locations where electricity is limited or unavailable, ice block refrigerators provide a practical cooling solution. Farmers, fishermen, and remote clinics rely on these units to store temperature-sensitive goods until they can be transported or used.
These refrigerators are often pre-chilled with ice blocks made in urban centers and then transported to remote areas, maintaining safe temperatures for days depending on insulation quality and ambient conditions.
Emergency Backup Systems
Hospitals, pharmacies, and medical supply centers use ice block refrigerators as emergency backups to protect temperature-sensitive items such as vaccines, insulin, and biological samples during power outages.
Given the critical nature of these materials, having a non-electric cooling option ensures compliance with storage regulations and prevents costly losses due to spoilage, especially in disaster-prone or underserved regions.
Catering and Outdoor Events
Portable ice block refrigerators are widely used by caterers and event planners for outdoor functions, festivals, and mobile food services. They allow for the safe storage of beverages, desserts, and prepared dishes without the need for electrical hookups.
Their mobility, durability, and ease of use make them ideal for temporary setups, ensuring food safety standards are maintained even in uncontrolled environments.
Agricultural Applications
On farms, ice block refrigerators are used to store temperature-sensitive agricultural inputs like seeds, veterinary medicines, and vaccines for livestock. Additionally, they play a crucial role in preserving raw milk after milking, preventing bacterial growth before it reaches processing facilities.
This capability supports better yields and higher-quality outputs, especially in small-scale or cooperative dairy farming operations without access to centralized cooling infrastructure.
Fishing Industry
In both artisanal and commercial fishing, ice block refrigerators are essential for on-board and post-harvest storage of fish and seafood. Immediate icing after catch drastically slows microbial spoilage and preserves texture, flavor, and nutritional value.
These refrigerators are commonly used in fishing boats, landing sites, and local markets, forming a critical link in maintaining seafood quality from water to consumer.
Floral Industry
Florists and flower distributors use ice block refrigerators to extend the vase life of cut flowers. Cold storage reduces respiration rates and delays wilting, helping blooms retain their freshness, color, and structural integrity.
These units are especially valuable during transport and at floral markets, where uninterrupted refrigeration ensures that arrangements remain vibrant and market-ready upon delivery.
| Industry | Primary Use | Key Benefit |
|---|---|---|
| Food Retail & Hospitality | Chilling meat, dairy, and prepared foods | Reduces spoilage and maintains food safety |
| Logistics & Transport | Keeping perishables cool during transit | Enables off-grid cold chain maintenance |
| Rural & Remote Operations | Storing goods without electricity | Supports economic activity in off-grid areas |
| Healthcare | Backup storage for vaccines and medicines | Prevents loss of critical medical supplies |
| Agriculture | Milk, seed, and veterinary product storage | Improves product quality and farm efficiency |
| Fishing | On-board and post-catch fish preservation | Extends shelf life and market value of seafood |
| Floriculture | Storing cut flowers and floral arrangements | Preserves freshness and aesthetic quality |
Advantages of Ice Block Refrigeration in Commercial Settings
Important: While ice block refrigerators offer numerous benefits, they require proper planning for ice replenishment and temperature monitoring. Over time, melting ice reduces cooling efficiency, so regular maintenance and timely ice replacement are crucial to ensure consistent performance. Always use clean, food-grade ice to prevent contamination, especially in medical and food-related applications.
Ice Block Refrigerator Specifications and Features
Ice block refrigerators are specialized cold storage units designed for industries requiring long-term preservation of perishable goods, medical supplies, or large-scale ice storage. These units combine robust construction with advanced cooling technology to maintain consistently low temperatures. Understanding their technical specifications, installation requirements, operational best practices, and maintenance protocols ensures optimal performance and longevity.
Technical Specifications
Storage Capacity
Ice block refrigerators are available in a wide range of sizes to suit various operational needs—from compact units for small businesses to massive industrial walk-ins.
- Residential or small commercial models: 5–50 cubic feet (ideal for cafes, small labs, or home use)
- Mid-sized commercial units: 100–500 cubic feet (suitable for restaurants, clinics, or fisheries)
- Industrial-scale refrigerators: 1,000–3,000+ cubic feet (used in cold storage warehouses, ice production plants, and pharmaceutical distribution centers)
Note: Larger units often feature modular designs for scalability and integration with ice-making machinery.
Cooling System
Modern ice block refrigerators utilize advanced forced-air cooling systems to ensure uniform temperature distribution throughout the chamber.
- Forced-air circulation: Uses fans and ducts to distribute cold air evenly, minimizing hot spots and improving efficiency
- Evaporator coils: Typically located at the top or rear for optimal airflow and frost control
- Legacy systems: Older models may use gravity-based cooling, which relies on natural convection and is less effective in maintaining consistent temperatures
Upgrade tip: Consider retrofitting older units with fan-assisted cooling kits for improved performance.
Temperature Range
Precise temperature control is critical for preserving ice blocks and sensitive materials.
- Operating range: -18°C to -25°C (0°F to -13°F), ideal for freezing and long-term ice storage
- Digital thermostats allow fine-tuned control within ±1°C accuracy
- Some medical-grade models support ultra-low settings down to -30°C for vaccine or biological sample storage
Key benefit: Stable temperatures reduce ice sublimation and prevent product degradation.
Insulation
High-performance insulation is essential for minimizing energy loss and maintaining internal temperatures.
- Material: High-density polyurethane foam (PUF) with thermal conductivity as low as 0.02 W/m·K
- Thickness: Typically 4–5 inches (100–127 mm), with premium models exceeding 6 inches
- Construction: Seamless panel joints and vapor barriers prevent moisture ingress and condensation
Pro insight: Look for CFC-free, environmentally friendly insulation with fire-retardant properties.
Energy Consumption
Despite their size, modern ice block refrigerators are engineered for energy efficiency.
- Average power draw: 1.5–5 kW per day, depending on size and usage frequency
- Equipped with high-efficiency compressors (e.g., scroll or reciprocating types) and variable-speed drives
- Advanced models include smart energy monitoring systems with real-time consumption tracking via digital displays or mobile apps
- Some units qualify for energy efficiency certifications (e.g., ENERGY STAR, CE marking)
Sustainability note: Solar-compatible models are emerging for off-grid or eco-conscious operations.
Additional Technical Features
- Door design: Heavy-duty, self-closing doors with magnetic seals and anti-condensation heaters
- Interior materials: Stainless steel or food-grade polymer linings for durability and easy cleaning
- Lighting: LED interior lights with motion sensors to reduce heat generation
- Alarm systems: Audible/visual alerts for temperature deviations, door left open, or power failure
Safety tip: Units used in food or medical applications should include data loggers for temperature compliance reporting.
Installation Guide
Professional Installation Recommended: Due to electrical, plumbing, and structural requirements, always engage certified technicians for setup. Improper installation can void warranties and compromise safety.
Location & Foundation
- Choose a level, well-ventilated area with at least 12 inches of clearance around the unit for airflow
- Ensure proximity to a dedicated electrical circuit (220V/30A typical for large units) and water supply (if humidity control or automatic defrost is required)
- Foundation must support 500–5,000+ lbs depending on size; concrete slab or steel-reinforced platform recommended
- Avoid direct sunlight, heat sources, or high-traffic zones that cause frequent door openings
Electrical & Plumbing
- All wiring must comply with local electrical codes (e.g., NEC, IEC) and be grounded properly
- Use GFCI-protected circuits to prevent electrical hazards in humid environments
- If water line is required (for humidification or ice makers), install a shut-off valve and use corrosion-resistant piping
- Drain lines should slope correctly to prevent freezing and blockages
Assembly & Sealing
- For modular units, follow manufacturer’s sequence for panel assembly using provided gaskets and sealants
- Ensure all joints are airtight—use foam sealant or tape to close gaps and prevent thermal bridging
- Verify door alignment and test seal integrity with the dollar bill test (if the bill resists removal when closed in the door, the seal is good)
Cooling System Setup
- Install compressor in a cool, dry location with adequate ventilation
- Connect refrigerant lines carefully to avoid leaks; pressure-test the system before startup
- Evaporator and condenser coils must be clean and unobstructed
- Follow manufacturer torque specifications for all fittings
Testing & Compliance
- Run the unit for 24–48 hours before loading to stabilize temperature
- Use calibrated thermometers or data loggers to verify temperature uniformity across all zones
- Check for abnormal noises, vibrations, or refrigerant leaks
- Ensure compliance with health and safety regulations (e.g., FDA, HACCP, OSHA) if storing food or medical products
Final check: Document installation details and keep a copy of compliance certificates on file.
Operational Best Practices
Loading & Temperature Management
- Pre-cool the chamber before introducing ice blocks or perishables
- Arrange items to allow at least 2–3 inches of clearance around cooling vents and fans
- Set temperature based on stored items: -18°C for general freezing, -25°C for long-term ice storage
- Use secondary containment (e.g., trays) for liquids to prevent contamination during defrost cycles
Monitoring & Load Distribution
- Install redundant temperature monitoring devices (digital display + standalone thermometer)
- Check readings at least twice daily in critical applications
- Distribute weight evenly to prevent structural stress and airflow blockage
- Avoid overloading—maintain at least 20% free space for air circulation
Pro tip: Label shelves and zones for organized inventory management and faster access.
Maintenance and Repair
Preventive Maintenance
- Cleaning: Wipe interior and exterior weekly with warm, soapy water; avoid abrasive cleaners that scratch surfaces
- Seal inspection: Check door gaskets monthly for cracks, tears, or stiffness; replace if compromised
- Defrosting: Manual defrost units should be thawed every 1–3 months; automated systems may require less frequent attention
- Coil cleaning: Vacuum condenser coils every 6 months to maintain heat exchange efficiency
Inspection & Repairs
- Listen for unusual compressor noises (hissing, knocking) indicating refrigerant or mechanical issues
- Inspect for oil stains or frost buildup, which may signal refrigerant leaks
- Test door switches and alarm systems regularly
- Only use OEM or manufacturer-approved replacement parts to maintain performance and warranty coverage
- Schedule professional servicing annually or as specified in the manual
Critical reminder: Never attempt refrigerant handling without proper certification and equipment.
Longevity Tip: Implement a preventive maintenance log to track cleaning, defrosting, inspections, and repairs. Units maintained according to manufacturer guidelines can last 15–20 years or more, significantly reducing total cost of ownership.
| Feature | Standard Model | Premium Model | Industrial Model |
|---|---|---|---|
| Storage Capacity | 5–50 cu ft | 100–500 cu ft | 1,000–3,000+ cu ft |
| Insulation Thickness | 3–4 inches | 5 inches | 6+ inches (modular panels) |
| Cooling System | Forced air | Forced air + digital controls | Multi-stage compressor with redundancy |
| Energy Efficiency | Moderate (2–3 kWh/day) | High (smart monitoring) | Optimized with variable speed drives |
| Maintenance Interval | Quarterly | Bi-annual professional service | Monthly inspections + remote monitoring |
Key Takeaways
- Right-sizing matters: Match storage capacity to your operational volume to avoid inefficiency or overcapacity costs
- Invest in quality insulation: Thicker, high-density foam reduces energy use and improves temperature stability
- Follow installation protocols: Proper setup by qualified professionals prevents costly failures and safety risks
- Monitor consistently: Regular temperature checks and logging ensure compliance and product safety
- Maintain proactively: Routine cleaning, seal checks, and professional servicing extend lifespan and performance
How to Choose the Right Ice Block Refrigerator: A Complete Buyer’s Guide
Selecting the ideal ice block refrigerator is essential for preserving perishable goods efficiently, especially in off-grid, commercial, or emergency situations. Unlike conventional electric refrigerators, ice block refrigerators rely on stored ice to maintain cool temperatures, making them ideal for remote areas, outdoor events, or backup cooling solutions. This comprehensive guide breaks down the key factors to consider when purchasing an ice block refrigerator, helping you make an informed decision based on your specific needs.
Key Factors to Consider When Choosing an Ice Block Refrigerator
- Storage Capacity
Ice block refrigerators are available in a wide range of sizes, from compact 5 cubic foot units designed for household use to large industrial models exceeding 3,000 cubic feet for commercial or institutional applications. Your choice should align with the volume of food, beverages, or medical supplies you need to store.
- Small (5–50 cu ft): Ideal for home kitchens, camping, or small food carts.
- Medium (50–500 cu ft): Suitable for restaurants, caterers, or medical clinics.
- Large (500+ cu ft): Best for warehouses, fisheries, or large-scale operations.
Tip: Estimate your daily storage needs and allow 10–20% extra capacity for airflow and ice placement.
- Cooling System Type
The cooling mechanism determines how effectively the refrigerator maintains low temperatures. There are two primary types:
- Forced Air Cooling: Uses fans to circulate cold air evenly throughout the chamber, ensuring consistent temperatures. Ideal for environments requiring precise cooling, such as medical storage or commercial kitchens.
- Passive Cooling: Relies on natural convection and the placement of ice blocks. More energy-efficient but may result in temperature gradients. Best for short-term storage or low-power settings.
Consider your local climate—hot, humid environments benefit from forced air systems, while cooler areas may suffice with passive models.
- Energy Efficiency
While ice block refrigerators consume less electricity than compressor-based units, energy efficiency still matters—especially for hybrid models with fans or monitoring systems. Look for features that reduce power consumption:
- High-density insulation (e.g., polyurethane foam)
- Energy Star-rated components (if electric elements are used)
- Reflective exterior coatings to minimize heat absorption
Energy-efficient models lower long-term operating costs and are more sustainable, particularly in off-grid or solar-powered setups.
- Mobility and Portability
If you plan to move the refrigerator frequently—such as for catering, outdoor events, or disaster relief—choose a model designed for mobility:
- Integrated wheels or casters for smooth transport
- Reinforced handles for lifting and positioning
- Compact, stackable designs for storage and transit
Portable ice block fridges are commonly used in food trucks, festivals, and mobile medical units where reliable cold storage is needed on the go.
- Durability and Build Quality
Given their use in demanding environments, durability is a top priority. High-quality materials ensure longevity and resistance to wear, moisture, and corrosion:
- Stainless Steel: Offers excellent strength, hygiene, and rust resistance—ideal for commercial kitchens and medical facilities.
- High-Density Polyethylene (HDPE): Lightweight, impact-resistant, and perfect for outdoor or mobile applications.
Also inspect door seals (gaskets) and hinges—they should be robust and airtight to prevent cold air leakage and maintain efficiency.
- Noise Level
Some ice block refrigerators include fans or small compressors for enhanced cooling, which can generate noise. This may be disruptive in quiet environments like hospitals, laboratories, or residential areas.
Always check the decibel (dB) rating in the product specifications:
- Below 40 dB: Whisper-quiet, suitable for sensitive environments.
- 40–50 dB: Moderate noise, acceptable for most commercial uses.
- Above 50 dB: Can be distracting; best used in industrial or outdoor settings.
- Smart Features and Remote Monitoring
Modern ice block refrigerators increasingly come equipped with smart technology for enhanced control and monitoring:
- Digital temperature displays
- Wi-Fi or Bluetooth connectivity
- Mobile alerts for temperature fluctuations or door openings
- Data logging for compliance (e.g., vaccine storage)
These features are especially valuable when storing high-value or temperature-sensitive items like pharmaceuticals, biological samples, or premium food products.
| Feature | Best For | Recommended Options | Avoid If… |
|---|---|---|---|
| Large Capacity (500+ cu ft) | Industrial, medical, or bulk storage | Stainless steel walk-in units | You have limited space or low storage needs |
| Forced Air Cooling | Hot climates, precision cooling | Units with energy-efficient fans | Quiet operation is critical |
| HDPE Construction | Outdoor, mobile, or rugged use | Portable coolers with UV protection | You need maximum hygiene (e.g., food prep) |
| Remote Monitoring | Vaccines, labs, high-value goods | Wi-Fi enabled models with alerts | Budget is tight or tech is unnecessary |
| Wheeled Design | Events, catering, mobile clinics | Locking casters, ergonomic handles | Unit will remain stationary |
Expert Tip: Pre-chill your ice block refrigerator before loading it with perishables. This helps maintain a stable temperature and reduces the rate at which ice melts, extending cooling duration by up to 30%.
Important Note: Always ensure proper ventilation around the unit, especially if it includes electric components. Overheating can reduce efficiency and shorten the lifespan of fans or control systems.
Final Recommendations
- Measure your available space before purchasing to ensure a proper fit.
- Check warranty terms and availability of replacement parts, especially for remote locations.
- Consider future scalability—choose a model that can accommodate growing storage needs.
- For medical or pharmaceutical use, verify compliance with regulatory standards (e.g., WHO, CDC).
- Test the unit with ice blocks before full deployment to evaluate performance under real conditions.
Choosing the right ice block refrigerator involves balancing capacity, durability, cooling efficiency, and additional features. By carefully evaluating your specific requirements and environment, you can select a unit that delivers reliable, long-term cold storage—whether for food, medicine, or emergency preparedness.
Frequently Asked Questions About Ice Block Refrigerators
A1: The ideal temperature range for an ice block refrigerator is typically between -18°C and -25°C. Within this range:
- Food remains safely frozen, preserving texture and nutritional value.
- Bacterial growth and enzymatic activity are significantly slowed, extending the shelf life of perishable goods like meat, seafood, and dairy.
- Ice blocks maintain a stable melting rate, providing consistent cooling without rapid temperature fluctuations.
This temperature zone aligns with international food safety standards for long-term frozen storage and is especially critical in commercial kitchens, remote clinics, and off-grid living environments.
A2: The lifespan of an ice block depends on several key factors, but under optimal conditions, large, high-density ice blocks can last up to 48 hours or more. Key influences include:
- Insulation Quality: Refrigerators with thick polyurethane foam insulation retain cold more effectively, reducing melt rate.
- Ice Block Size & Density: Larger, compacted ice blocks (e.g., 10–20 kg) melt slower than smaller or loosely frozen ones.
- Ambient Temperature: In hot climates (above 30°C), ice may melt faster; shaded or indoor placement improves longevity.
- Usage Frequency: Frequent door opening introduces warm air, accelerating ice melt.
Properly managed, ice block refrigeration offers reliable cooling for extended periods, making it ideal for camping, emergency preparedness, and rural healthcare.
A3: Yes, ice block refrigerators are widely used in healthcare settings—especially in remote or resource-limited areas—for the safe storage of vaccines and temperature-sensitive medications. These units are part of the World Health Organization (WHO)-recommended cold chain equipment due to their ability to:
- Maintain stable temperatures within the required range (typically 2°C to 8°C for most vaccines, though some require ultra-cold storage).
- Operate during power outages when pre-frozen ice blocks are used.
- Support solar-powered models that freeze ice blocks during daylight for nighttime cooling.
Specialized vaccine refrigerators with ice packs are designed to prevent freezing of sensitive doses while ensuring consistent cooling, making them essential in immunization programs across developing regions.
A4: Yes, many modern ice block refrigerators are highly energy-efficient, particularly those designed for off-grid or low-resource environments. Their efficiency comes from:
| Feature | Energy Efficiency Benefit |
|---|---|
| Advanced Insulation (e.g., CFC-free polyurethane) | Reduces heat transfer, minimizing compressor runtime and energy use. |
| Energy-Saving Compressors | Use 30–50% less electricity than conventional models while maintaining performance. |
| Solar-Powered Systems | Utilize renewable energy to freeze ice blocks, enabling operation without grid electricity. |
| Thermal Mass of Ice | Acts as a cooling reservoir, allowing the compressor to run intermittently rather than continuously. |
These features make ice block refrigerators a sustainable and cost-effective solution, especially in areas with unreliable power or high electricity costs.
A5: Regular cleaning and maintenance are crucial for hygiene, efficiency, and longevity. Recommended schedule:
- Monthly: Deep clean the interior with a mild disinfectant (e.g., vinegar-water solution or food-safe cleaner) to prevent mold, odors, and bacterial buildup.
- Weekly: Wipe down exterior surfaces and inspect for ice accumulation around the cooling compartment or vents, which can reduce airflow and efficiency.
- After Each Ice Cycle: Remove residual water and dry the chamber to prevent contamination and corrosion.
- As Needed: Check door seals for tight closure and clean condenser coils (if applicable) to ensure optimal heat dissipation.
Proper maintenance not only ensures food and medical product safety but also extends the refrigerator’s operational life and energy efficiency.








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