A vertical ultra-low temperature freezer with a water-cooled system, engineered specifically for laboratory environments where compressor heat dissipation compromises thermal comfort, overloads air-conditioning systems, or where ventilation space is limited. The DW-86L828W (828 L) and DW-86L959W (959 L) models remove up to 90% of compressor-generated heat via cooling water — drastically reducing the ambient heat load, air-conditioning energy demand, and the overall thermal impact of ULT freezer operation on the laboratory microclimate, at a consumption of just 8.7 kWh/day with ENERGY STAR certification and HC refrigerant.

The water-cooled system replaces the conventional heat dissipator with a cooling water circuit that absorbs compressor heat before it is released into the laboratory's indoor air. The result is up to 90% reduction in heat dissipation to the room — making the unit ideal for low-ventilation rooms, lab data centers, multi-freezer storage facilities, and any installation where temperature rise from ULT equipment operation is an operational or regulatory concern.

Intelligent frequency conversion technology automatically adjusts compressor speed based on load demand, delivering up to 20% additional energy savings versus fixed-speed systems while extending compressor service life. The dual independent refrigeration system ensures that if one system fails, the second automatically maintains specimen temperature — critical protection for irreplaceable biological materials. HC refrigerant with low GWP completes the series' environmental positioning.

The standalone sample management system allows users to manage freezer inventory directly through the integrated software, with no dependency on external platforms. The microprocessor controller with 10-inch LCD touchscreen displays temperature (0.1°C precision), voltage, and ambient temperature in real time. A pressure protection system monitors water flow and protects the unit in case of insufficient water supply — a unique and essential alarm feature exclusive to water-cooled systems. Additional alarms cover: high and low temperature, hot condenser, power failure, sensor error, low battery, and door ajar. Standard interfaces include USB, RS485, and a 5V power port; optional CO₂ and LN₂ backup systems are available.

Technical Specifications

Key Features

• Water-cooled system removes up to 90% of compressor heat — eliminates thermal overload in the laboratory

• Just 8.7 kWh/day energy consumption with ENERGY STAR certification

• Up to 20% additional energy savings via intelligent frequency conversion

• Dual independent refrigeration systems: automatic redundancy with no human intervention

• Low-GWP HC refrigerant — zero high-GWP fluorinated compounds

• Standalone integrated sample management software

• Pressure protection system with water flow monitoring — exclusive alarm critical to water-cooled systems

• 10" LCD touchscreen at 0.1°C precision with real-time voltage and ambient temperature display

• Complete alarm system: 8+ types including hot condenser, low battery, and door ajar

• Standard USB, RS485, and 5V power port; optional CO₂ and LN₂ backup systems

• Unique-key lockable handle + padlock support standard

• CE certified on both models

Applications

The DW-86L828W and DW-86L959W are designed for hospitals, blood banks, research laboratories, disease control centers, pharmaceutical companies, and scientific institutes operating in environments with high refrigeration equipment density, limited ventilation, constrained air-conditioning budgets, or regulatory requirements for ambient temperature control — particularly relevant in hot and humid climates, lab data centers, and critical storage rooms housing multiple ULT freezers.

The combination of water cooling, intelligent frequency conversion, and dual independent refrigeration systems makes the series especially suited for biobanks and pharmaceutical laboratories managing large sample volumes in enclosed spaces, where every watt of dissipated heat represents an additional HVAC cost and a thermal instability risk for the entire installed equipment ecosystem