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Blizzard HC NU-99728J -80 °C Ultralow Freezer

Reference NU-99728J

Safeguard vital research with the Blizzard NU-99728J -86°C ULT freezer—a high-capacity solution for reliable, long-term cell preservation with advanced temperature control systems.

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At a glance

Reference
NU-99728J
Category
Laboratory Refrigeration & Freezers
Product range
Blizzard HC

Overview

The Blizzard NU-99728J -86°C Ultralow Temperature Freezer provides dependable storage for sensitive biological samples including stem cells, blood, tissue, and vaccines. With a spacious 28.1 cu. ft. (796 L) interior, this unit supports high-volume sample preservation for research-intensive environments. Precision temperature control is achieved through a dual-compressor cascade system and vacuum-insulated panel construction, ensuring stable and uniform storage conditions. Smart monitoring via audible and visual alarms, combined with a battery backup, keeps your lab informed even during power disruptions. Optional CO₂/LN₂ backup offers added security for mission-critical applications. Engineered for durability and ease of use, the NU-99728J combines quiet operation, ergonomic access, and robust build quality—a reliable choice for PIs and lab managers dedicated to long-term research success.

Our Ultralow Freezer features an advanced electronic control system strategically placed at eye level, making monitoring crucial data at a glance effortlessly accessible. This intelligent interface not only displays the internal temperature, ambient temperature, and voltage in real time but also ensures the safety of your precious samples with an integrated audible and visual alarm system. With several indicator lights, users gain insight into the freezer's condition: operational status, alarm triggers, or maintenance alerts. The intuitive navigation arrows and set key empower users to customize access via passcode, adjust temperature settings, define alarm limits, and tailor freezer preferences to their specific needs, enhancing security and operational efficiency in your laboratory environment.

The Ultralow Freezer NU-99728J revolutionizes dependable research storage with its cutting-edge insulation and refrigeration system. Featuring insulated inner doors with individual latches, it ensures temperature stability, which is vital for the integrity of sensitive samples. Vacuum Insulated Panels (VIP) combined with high-density, low-conductivity polyurethane foam enhance temperature uniformity and maximize storage capacity, making every inch count. Hydrocarbon (HC) refrigerants, an eco-friendly choice, offer efficient cooling without harming the ozone layer. The quadruple outer and single-gasket inner doors create a pressure-tight seal, drastically reducing icing and thermal intrusion. This freezer is designed to meet the rigorous research storage demands, providing peace of mind with every use.

Blizzard Ultralow Freezers are engineered for seamless access without compromising sample security or temperature stability. The innovative Pressure Equalization Port, equipped with a heated, spring-assisted mechanism, ensures the freezer door can be easily opened right after sample insertion, preventing icing. The outer door features a locking claw latch that maintains a tight seal to minimize frost build-up and allows for effortless opening with minimal effort. The door includes a key lock and padlock option for enhanced security, ensuring your valuable research materials are safeguarded. Inside, individual latching inner doors maintain pressure-tight sales, making organizing and accessing samples straightforwardly without affecting the entire storage environment. This freezer combines practical usability with the stringent security measures essential for high-value research storage.

The NU-99728J Ultralow Temperature Freezer introduces seamless data management and connectivity for modern laboratories, featuring a USB Data Port for easy download of freezer data directly from the electronic control center. With a standard remote alarm and RS485 ports in the power switch panel, this freezer allows for the transmission of temperature and alarm data to independent software for comprehensive monitoring and recording. An optional Circular Chart Recorder offers an extra layer of data reliability with internal temperature monitoring and recording, ensuring your research data is accurately tracked and securely managed. This integration of advanced connectivity options ensures that Blizzard ULTs meet and exceed the data management needs of today's fast-paced scientific environments.

Features

  • Maximize Lab Efficiency with Smart Control Freezer
  • Secure & Efficient Storage with Advanced Insulation
  • Effortless Access with Smart Freezer Design
  • Seamless Data Management in Freezers

Technical specifications

Style
Upright
Alarms
Temperature, Power Failure, Probe Failure, Condenser, Ambient Temperature, Door Ajar, Low Battery, etc.
Casters
All-direction caster with fixing stand
Shelves
3 Shelves, 4 Locations
Fan Brand
EBM
Insulation
VIP+CFC Free Foaming Agent
Power Cord
Grounded Three Prong Power Plug, Rated 20A
Inner Doors
4
Show 64 more specifications
Sound Level
50 dB(A)
Leg Levelers
2
Power Switch
On-Off with Circuit Breaker
Exterior Door
Single Door
Rack Capacity
20
Condenser Type
Enhanced Micro-Channel & Forced-Air Cooled
Defrost Method
Manual
Shelf Material
Stainless Steel
Evaporator Type
Cold Wall With Enhanced Heat Transfer Treatment
Input Power (W)
935
Exterior Material
Color Coating Cold Plate Steel
Interior Material
Color Coating Electric Zinc Steel Plate
Locking Mechanism
Key
Rated Current (A)
18.0
Rated Voltage (V)
115
Setpoint Security
Yes
Exterior Door Seal
Quadruple Seal on the Outside Door
Interior Door Seal
Single Seal on all Interior Doors
Stable Current (A)
8.1
2-inch Box Capacity
500
Net Weight
761 lbs (345 kg)
Temperature Control
Microprocessor Controller
Access Port Location
Back Wall
Data Output Features
USB, RS-232/485
Rated Frequency (Hz)
60
Temperature Range °C
-40 to -86
Auto Voltage Safeguard
Included
Remote Alarm Terminals
Remote Alarm Port, RS232 / RS485 (Optional)
Shelf Capacity
199 lb (90 kg)
Shelf Depth
26.6 in (677 mm)
Shelf Width
29.5 in (750 mm)
Temperature Sensor Type
RTD (Pt100)
Compressor Capacity Watt
950
Electrical Configuration
115V60Hz
Heat Rejected
1200 BTU/h
Temperature Accuracy
±1 °C
Ambient Temperature (°C)
10 to 32
Power Consumption KWh/day
10.5
Refrigeration System Type
Direct cooling
Door Thickness
3.5 in (90 mm)
Exterior Depth
38.6 in (980 mm)
Exterior Width
41 in (1041 mm)
Interior Depth
28.2 in (716 mm)
Interior Width
30.2 in (766 mm)
Temperature Uniformity
±5 °C
Exterior Height
78 in (1980 mm)
Footprint Depth
38.6 in (980 mm)
Footprint Width
41 in (1041 mm)
Interior Height
51.6 in (1310 mm)
Compressor Type/Brand/Number
Hermetic Reciprocating Type / SECOP / 2
Refrigerant Charge/Flammable
R290 in 1st Stage / R290 + R170 Mix in 2nd Stage / Flammable in JE Version; R290 in 1st Stage / R170 in 2nd Stage / Flammable in JG & JGA Versions
Cabinet Thickness
3.5 in (90 mm)
Est. Shipping Weight
Estimated 849 lbs (385 kgs)
Power Cord Length
8.2 ft (2.5m)
Est. Shipping Depth
42 in (1067 mm)
Est. Shipping Width
44 in (1118 mm)
Est. Shipping Height
84 in (2137 mm)
Back Up Battery for Alarm Functions
High/low temperature, power failure, door open, sensor failure, high ambient temperature, hot condenser and low battery alarms
Interior Volume
25.7 ft³ (728 L)
Adjustable High/Low Temperature Alarms
True
Exterior Depth with Door Open
74.80 in (1900 mm)
Cool Down Time (25°C ambient to -80°C) in Minutes
310
Warm-Up Time (25°C ambient -80°C to -50°C) in Minutes
270
1 Minutes Door Open Recovery Time (25°C ambient running temp -75°C) in Minutes
45
Service coverage

AxiTech maintains, repairs and supplies this equipment for hospitals, clinics, laboratories and imaging centres.

Maintenance contracts for NuAire Blizzard HC NU-99728J -80 °C Ultralow Freezer

A service visit on the NuAire Blizzard HC NU-99728J -80 °C Ultralow Freezer covers temperature verification against a calibrated probe, alarm and back-up tests, condenser cleaning, door gaskets and hinges, and the performance of the refrigeration system.

Every visit includes calibration and performance verification, and closes with a documented maintenance report you can present during an accreditation audit. Spare-parts availability and a guaranteed response time are written into the contract, so a breakdown never leaves a department waiting for an answer.

Laboratory refrigerators and freezers like the NuAire Blizzard HC NU-99728J -80 °C Ultralow Freezer should have their temperature and alarms verified at least once a year; ultra-low freezers benefit from a six-monthly condenser clean and gasket check.

  • Temperature verified against a calibrated reference probe
  • High, low and power-failure alarms tested
  • Condenser and filters cleaned, door gaskets and hinges checked
  • Compressor and refrigeration performance assessed

Discover our maintenance contracts

Planned preventive maintenance and calibration under contract

Troubleshooting and repair for NuAire Blizzard HC NU-99728J -80 °C Ultralow Freezer

When NuAire Blizzard HC NU-99728J -80 °C Ultralow Freezer fails, our engineers start with a structured diagnostic: error codes, electrical and mechanical checks, and a functional test against the equipment’s own specification. That tells us whether the fault is a consumable, a worn part or a board-level failure before any part is ordered.

Straightforward faults are repaired on site so the department loses as little time as possible. Anything that needs a workbench, a full strip-down or a specialised spare part goes to our workshop and comes back only after a complete post-repair test and, where the equipment requires it, recalibration.

Faults we see most often on this type of equipment

On refrigerated storage the usual faults are clogged condenser filters, worn door gaskets and ice build-up, alarm or probe failures, and compressors that run continuously because the system has lost refrigerant or airflow.

Discover our troubleshooting and repair service

Diagnostics, corrective repair and spare parts in the workshop
Troubleshooting

How to troubleshoot NuAire Blizzard HC NU-99728J -80 °C Ultralow Freezer

Work through these checks before you escalate. They are the same first-line sequence our biomedical engineers run on arrival, and they either clear the fault or narrow it down enough that the intervention starts with the right spare part in the van.

  1. Capture the fault before you touch anything: write down the exact error code or message, the serial number from the rating plate, what the operator was doing and whether the fault clears on a restart.

  2. Check that the door closes and seals fully, and clear ice from the gaskets and door frame — a poor seal is the most common reason a unit cannot hold temperature.

  3. Clean or check the condenser filter and make sure the unit has the clearance around its vents that the manual specifies.

  4. Compare the display with an independent thermometer and check the alarm history for recent power interruptions.

  5. If the fault is still there, escalate with the evidence. Send AxiTech the model, serial number, error code and the checks you have already run, and an engineer will come back with a diagnosis, a repair quote and a spare-parts lead time for NuAire Blizzard HC NU-99728J -80 °C Ultralow Freezer.

What to send us when you report the fault

  • Manufacturer, model and serial number, from the rating plate
  • The exact error code or message, and the screen it appears on
  • When the fault started, how often it occurs and what triggers it
  • A photograph of the display or of the fault, and the last maintenance report

If the fault survives all five steps, stop using NuAire Blizzard HC NU-99728J -80 °C Ultralow Freezer and open a repair request. Continuing to run equipment through a fault it cannot clear turns a component failure into a board-level one, and on devices used for diagnosis or therapy it puts the result — and the patient — in doubt.

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Buying and installing NuAire Blizzard HC NU-99728J -80 °C Ultralow Freezer

AxiTech supplies NuAire Blizzard HC NU-99728J -80 °C Ultralow Freezer together with the accessories and consumables it needs to enter service. We handle importation, delivery and installation, then commission the equipment on site so that it is verified against its specification before the first patient or the first sample.

Installation is followed by training for the users and for your biomedical team, warranty registration, and — if you want it — a maintenance contract that takes over the day the warranty ends, so the equipment never spends a period without planned service.

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Delivery, installation, commissioning and user training
Product FAQ

Questions about the NuAire Blizzard HC NU-99728J -80 °C Ultralow Freezer

Safeguard vital research with the Blizzard NU-99728J -86°C ULT freezer—a high-capacity solution for reliable, long-term cell preservation with advanced temperature control systems.

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