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-80°C Ultra Low Temp Upright Freezer DW-86L

Haier's third-generation ULT freezers are designed with technology that improves energy efficiency. The TwinCool technology provide optimal reliability, longevity, efficiency, and sample protection. Two independent refrigeration systems ensure samples are fully protected under worst-case conditions, depending on load demands and ambient conditions.

Additionally, each of the independent refrigeration systems is capable of maintaining -80°C separately.


Haier Biomedical's ultra-low temperature freezers feature TwinCool technology, providing optimal reliability, longevity, efficiency, and sample protection. Two independent refrigeration systems ensure samples are fully protected under worst-case conditions, depending on load demands and ambient conditions. 

The cabinet pulldown is fast and efficient, taking an average of three hours to reach -80°C at 25°C ambient. This ensures that the temperature recovers quickly after a door opening, minimising exposure of stored samples to undesirable temperatures.

These freezers are energy efficient with a low power consumption of only 8.2Kwh/day and have an innovative refrigeration design that reduces operational noise. The adaptive control technology controls the fans and compressors to reduce the sound level to 43.5 dB(A).

The Haier ultra-low upright freezers feature a unique design that includes insulated inner doors with four separate storage compartments to minimise frost buildup in the chamber. These doors allow independent access for maximum sample protection, and each is sealed to prevent cold temperature loss during opening.

The microprocessor-controlled system maintains temperatures between -40° to -86°C with 1°C increments. VIP insulated panels and a specialised control system with built-in protection features, such as a user-settable protection code, voltage compensation system, and protection against extremely high voltages, ensure reliable operation. Malfunction alarms include high and low temperatures, power outages, sensor errors, high and low voltage, clean-filter, and high ambient conditions.

The improved handle design with a unique key prevents access to samples by other Haier freezer owners and has space for a padlock for extra security.

Technical Data

  • Brand
  • Capacity
    338L - 959L
  • Models Available
  • Temperature Range
    -40°C to -86°C
  • Castors

Support & FAQs

At Thermoline, we strive to supply helpful customer support to ensure that you get the most out of our products. We are committed to providing whatever support our customers need, wherever they are in the world. If you can't find your solution in the below FAQs or Knowledge Base, please contact our friendly support team.

How often should you defrost a lab freezer?

The frequency of defrosting a lab freezer depends on the model and the usage pattern. However, it is generally recommended to defrost a lab freezer at least once or twice a year to maintain its optimal performance.

A buildup of ice in the freezer can reduce its efficiency and increase the risk of freezer burn, damaging the quality of the samples stored inside. It can also increase the risk of mechanical failure, leading to costly repairs or even loss of samples.

Following the manufacturer's instructions for defrosting the freezer is important, as the process may vary depending on the model. Generally, defrosting should be done when the freezer is relatively empty, with the samples stored elsewhere temporarily. The freezer should be turned off and allowed to thaw completely before cleaning and restarting.

In addition to regular defrosting, keeping the freezer clean and well-maintained is vital to ensure its longevity and reliability.

What different types of laboratory freezer are available?

There are several types of laboratory freezers available, including:

  1. Upright freezers: These freezers have a vertical orientation and are available in a range of sizes, from under benchtop models to large capacity units that can store hundreds of samples. Upright freezers typically have several shelves, drawers or compartments for easy organisation of samples.

  2. Chest freezers: Chest freezers have a horizontal orientation and are often used for storing large or bulky items. They are more energy efficient than upright freezers and can provide longer holdover times during power outages.

  3. Biomedical Chest Freezers: These -60°C chest freezers are suitable for storing a wide variety of biological products including viruses, bacteria, blood cells, skin and bone as well as ocean-going supplies and electronic devices. 

  4. Ultra-low temperature freezers: These freezers provide even lower temperatures, down to -80°C. They are often used for long-term storage of biological specimens, vaccines, and other critical materials.

What is an ultra low freezer?
These are freezers designed specifically for laboratories to preserve biological samples. These provide a stable temperature from -40C right down to -80C
How does an ultra low freezer work?

Ultra Low Freezers make use of cascade refrigeration. A cascade refrigeration system is a type of refrigeration system that uses two or more refrigeration cycles operating at different temperature levels to achieve extremely low temperatures. It is commonly used when standard refrigeration systems cannot achieve the desired temperature range.

In a cascade refrigeration system, two or more refrigeration cycles are arranged in series, with the evaporator of one cycle serving as the condenser of the next cycle. The cycles are typically designed to operate at different temperature levels, with the coldest cycle being used to achieve the desired low temperature.

What is the temperature range for ultra low freezer?

The temperature range for ultra-low freezers is typically between -80°C and -40°C. These freezers are designed to maintain extremely low temperatures for long-term biological and other temperature-sensitive materials storage. They are commonly used in research and clinical laboratories, biobanks, and other facilities where the storage of valuable samples and specimens is required.

Most ULTs create a consistent environment where the freezer's internal temperature remains between -70°C and -80°C.