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-86°C Ultralow Freezer — main photograph
NuAireAvailability: Supplied to order

-86°C Ultralow Freezer

Reference NU-99729VFT

The Blizzard VFT NU-99729VFT delivers ENERGY STAR-certified -86°C ultralow temperature storage in a nominal 729-liter (25.7 cu. ft.) footprint, balancing substantial sample capacity with energy efficiency engineered for long-term, around-the-clock laboratory operation.

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At a glance

Part number
NU-99729VFT
Reference
NU-99729VFT
Category
Laboratory Refrigeration & Freezers
Equipment family
Blizzard VFT

Overview

For laboratories managing growing sample collections, the Blizzard VFT NU-99729VFT -86°C Ultralow Temperature Freezer provides a nominal 729-liter (25.7 cu. ft.) internal volume of ultralow temperature storage — accommodating up to 50,000 two-milliliter vials across 20 racks. It is the most widely specified model in the Blizzard VFT Series, combining meaningful capacity with ENERGY STAR-certified efficiency. Variable Frequency Technology (VFT) continuously modulates compressor speed to match real-time thermal demand, achieving ENERGY STAR-certified performance at 8.1 kWh per day. Two selectable operating modes allow your team to adapt to the moment: High Performance mode for tightest temperature uniformity, or Energy Saving mode for reduced power consumption during stable, long-term archiving. Four independent inner door sections minimize thermal disturbance during sample access, isolating each retrieval event to a single compartment while the remaining three maintain stable conditions. A 22-hour battery backup system sustains alarm coverage — monitoring temperature, power status, door position, probe integrity, condenser condition, and battery state — throughout power disruptions.

Variable Frequency Technology adapts compressor output in real time, achieving ENERGY STAR-certified energy consumption of 8.1 kWh per day. High Performance and Energy Saving modes allow your team to optimize for temperature control or energy economy.

Four thermally isolated inner door compartments concentrate thermal disturbance on the zone being accessed, keeping the remaining sample inventory undisturbed, essential in laboratories with frequent retrieval activity.

22-hour battery-backed alarm coverage maintains monitoring of temperature, power status, door position, probe integrity, condenser condition, and battery state during power events — protecting the samples your research depends on.

R290/R170 hydrocarbon refrigerant combines effective thermodynamic performance with near-zero global warming potential — supporting current environmental compliance requirements and positioning labs for anticipated future refrigerant standards.

Monitor freezer performance on the touchscreen LCD display, download logged data directly via USB, or transmit via RS-485 to laboratory data management and remote monitoring systems.

Maintenance contract — AxiTech provides planned preventive maintenance for -86°C Ultralow Freezer from NuAire: scheduled visits, safety checks, periodic calibration and a documented service report, backed by a contractual response time.

Troubleshooting, repair and spare parts — our biosafety cabinets & laminar flow engineers diagnose and repair -86°C Ultralow Freezer on site or in the workshop, fit genuine spare parts and recommission the equipment after performance verification.

Features

  • ENERGY STAR Certified: 8.1 kWh/day
  • Four Independent Inner Doors
  • 22-Hour Battery Backup
  • Hydrocarbon Refrigerant: Near-Zero GWP
  • Data Export and Remote Monitoring Ready

Technical specifications

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 16A
Inner Doors
4
Sound Level
43.5 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)
1650
Exterior Material
Color Coating Cold Plate Steel
Interior Material
Color Coating Electric Zinc Steel Plate
Locking Mechanism
Key
Rated Voltage (V)
100-230
Setpoint Security
Yes
2 mL Vial Capacity
50,000
Exterior Door Seal
Quadruple Seal on the Outside Door
Interior Door Seal
Single Seal on all Interior Doors
2 inch Box Capacity
500
Net Weight lbs (kg)
761 lbs (345 kg)
Temperature Control
Microprocessor Controller with Touchscreen
Access Port Location
Back Wall
Data Output Features
USB, RS-485
Safety Certification
Energy Star, UL, CE, UKCA
Temperature Range °C
-40 to -86
Auto Voltage Safeguard
Included
Remote Alarm Terminals
Remote Alarm Port, RS232 / RS485 (Optional)
Shelf Capacity lbs (kg)
199 (90)
Shelf Depth Inches (mm)
26.6 (677)
Shelf Width Inches (mm)
29.5 (750)
Temperature Sensor Type
RTD (Pt100)
Compressor Capacity Watt
950
Electric Protection Type
Class I
Electrical Configuration
100-230V, Variable Frequency
Heat Rejected (BTU/Hour)
1404
Temperature Accuracy °C
±1
Ambient Temperature (°C)
10 to 32
Power Consumption KWh/day
8.1
Refrigeration System Type
Direct cooling
Door Thickness Inches (mm)
3.5 (90)
Exterior Depth Inches (mm)
38.6 (980)
Exterior Width Inches (mm)
41.2 (1046)
Interior Depth Inches (mm)
28.2 (716)
Interior Width Inches (mm)
30.2 (766)
Temperature Uniformity °C
±3
Exterior Height Inches (mm)
78 (1980)
Footprint Depth inches (mm)
38.6 (980)
Footprint Width inches (mm)
41.2 (1046)
Interior Height Inches (mm)
51.6 (1310)
Compressor Type/Brand/Number
Hermetic Reciprocating Type / SECOP / 2
Cabinet Thickness Inches (mm)
3.5 (90)
Est. Shipping Weight lbs (kg)
Estimated 849 lbs (385 kgs)
Power Cord Length Foot (Meter)
8.2 ft (2.5m)
Est. Shipping Depth Inches (mm)
42 (1067)
Est. Shipping Width Inches (mm)
44 (1118)
Est. Shipping Height Inches (mm)
84 (2137)
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 Cubic Feet (Liters)
25.7 (729)
Adjustable High/Low Temperature Alarms
True
Exterior Depth with Door Open Inches (mm)
74.80 (1900)
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 -86°C Ultralow Freezer

AxiTech provides preventive maintenance contracts for -86°C Ultralow Freezer. Each contract fixes a schedule of planned visits in which our biomedical engineers inspect the equipment, replace wear parts before they fail, and verify that it still performs inside the manufacturer’s tolerances.

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 analysers are usually maintained every three to six months, with calibration and quality-control verification at each visit so that results stay traceable.

  • Planned preventive maintenance visits at a fixed interval
  • Calibration and performance verification against the manufacturer’s specifications
  • A documented maintenance report after every intervention
  • Guaranteed availability of spare parts and consumables
  • A contractual response time when the equipment fails

Discover our maintenance contracts

Planned preventive maintenance and calibration under contract

Troubleshooting and repair for -86°C Ultralow Freezer

When -86°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 analysers most faults come from the fluidics — blocked probes, worn pumps and tubing, leaking valves — followed by optical drift and reagent-handling errors.

Discover our troubleshooting and repair service

Diagnostics, corrective repair and spare parts in the workshop
Troubleshooting

How to troubleshoot -86°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. Review the quality-control and calibration history. A result that has drifted across several runs points at calibration or reagents; a sudden shift almost always points at the fluidics.

  3. Inspect the fluid path — probe, tubing, pump, valves and waste line — for blockage, crystallisation or leaks, and confirm reagent and wash levels together with their expiry dates.

  4. Confirm the ambient conditions the method depends on: bench temperature, ventilation, a level and vibration-free surface, and a stable mains supply.

  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 -86°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 -86°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.

Discover our troubleshooting and repair service

Buying and installing -86°C Ultralow Freezer

AxiTech supplies -86°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.

Discover our equipment sales service

Delivery, installation, commissioning and user training
Questions we are asked

Frequently asked questions about NuAire -86°C Ultralow Freezer

Yes. AxiTech services -86°C Ultralow Freezer, either under a maintenance contract or as a one-off intervention. Our biomedical engineers cover preventive maintenance, calibration, corrective repair and spare-parts supply for this equipment.

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