About This Document

The NuAire NU-99579VFT Ultralow Temperature Freezer Purchase Specifications (PSP-0033, Rev. 1, June 2026) is the complete technical procurement document for this model. It provides verified performance, dimensional, electrical, and control-system data your team needs to evaluate fit, specify installation requirements, and issue a purchase order. This document is intended for laboratory managers, facilities planners, procurement officers, and EHS coordinators involved in capital equipment acquisition. It is the authoritative reference for bid documents and lab design submissions.

NU-99579VFT: Engineered for Critical Sample Storage at -86°C

Your biological samples, cell lines, plasma, and vaccines require consistent ultralow temperatures to maintain viability. The NU-99579VFT delivers -86°C performance in a 579 L upright configuration, combining Variable Frequency Technology with dual compressor architecture and a hydrocarbon refrigerant system (R290/R170) to achieve efficient, stable cooling across the -40 to -86°C operating range.

ENERGY STAR® certification confirms the NU-99579VFT meets strict energy efficiency criteria for ultralow temperature storage, reducing operating costs without compromising the thermal performance your research demands. Learn more about NuAire’s approach to quality and sustainability: nuaire.com/about/quality-sustainability.

Variable Frequency Technology: Precision Cooling, Reduced Energy Draw

Variable Frequency Technology modulates compressor output in response to actual thermal load rather than operating at fixed full-power cycles. The result is a more stable internal environment, reduced temperature fluctuation during normal access events, and meaningfully lower energy consumption compared to conventional single-speed compressor designs.

The NU-99579VFT’s multi-voltage design (100–230 V / 50–60 Hz) supports global deployment from a single model configuration, simplifying procurement for institutions with international facilities.

Sample Protection and Storage Capacity

The 579 L interior supports up to 40,000 samples at standard 10×10 density across a 5×5 rack configuration. A four-door inner compartment design minimizes warm air infiltration during retrieval, protecting samples in adjacent sections when access is required. Vacuum-insulated panel (VIP) construction and CFC-free foam insulation reinforce the thermal barrier between the storage environment and ambient lab conditions.

For guidance on ULT freezer best practices and maintenance, see the NuAire Ultralow Freezer Use and Maintenance white paper.

Monitoring, Alarms, and Data Connectivity

A touchscreen LCD interface with microprocessor control provides digital temperature setting, password-protected screen access, and setpoint security. Ambient temperature is displayed continuously, supporting room condition awareness without a separate instrument.

The alarm system covers high/low temperature with adjustable thresholds, high ambient temperature, sensor error, power failure, high/low voltage, filter status, hot condenser, door ajar, and low battery, providing comprehensive event notification for unattended operation. A 22-hour backup battery maintains monitoring and alarm functions through extended power interruptions. Data connectivity includes USB interface, remote alarm terminals, and an RS-232/485 port for integration with laboratory monitoring systems or building management infrastructure.

For step-by-step guidance on configuring alarms on Blizzard VFT ultralow freezers, see: Set Inner Temperature Alarms on Blizzard VFT Freezers.

Backup Systems and Sample Continuity

The NU-99579VFT’s 22-hour battery backup and defined holdover performance give laboratory managers a documented window to respond to power events before sample integrity is at risk. For institutions with CryoStorage backup requirements, NuAire’s service and sales partner networks provide local support for backup system planning and installation: nuaire.com/sales-and-support/service-locator.

Certifications and Compliance

The NU-99579VFT carries CE and UL listings and holds ENERGY STAR® certification, confirming verified compliance with applicable safety, electromagnetic compatibility, and energy efficiency standards. These certifications support procurement and facilities approval processes at regulated research institutions, hospitals, and pharmaceutical facilities.

Frequently Asked Questions

What is the temperature range of the NuAire NU-99579VFT Ultralow Temperature Freezer?

The NuAire NU-99579VFT operates across a -40 to -86°C range, with a commonly used setpoint of -80°C. Internal temperature uniformity is maintained within ±3°C with 0.1°C control accuracy. The unit carries CE and UL listings and is ENERGY STAR® certified.

How energy efficient is the NU-99579VFT compared to conventional ultralow temperature freezers?

The NU-99579VFT uses Variable Frequency Technology to modulate compressor output in response to actual thermal load, reducing energy consumption compared to fixed-speed compressor designs. ENERGY STAR® certification confirms verified efficiency against EPA criteria for ultralow temperature freezers.

How many samples can the NU-99579VFT hold?

The NU-99579VFT provides 579 L (20.4 ft³) of capacity organized in a 5×5 rack configuration, accommodating 16 frozen storage racks (2-inch) and 400 frozen storage boxes (2-inch). Calculated sample loading capacity is 40,000 samples at 10×10 density.

What happens to the NU-99579VFT during a power failure?

The NU-99579VFT includes a 22-hour backup battery to maintain monitoring and alarm functions during a power outage. Remote alarm terminals and USB data output support integration with laboratory monitoring and building management systems.

What refrigerant does the NU-99579VFT use, and why does it matter?

The NU-99579VFT uses a hydrocarbon refrigerant system (R290/R170), a CFC-free, low global warming potential alternative to conventional synthetic refrigerants. Combined with VIP and CFC-free foam insulation, this supports institutional sustainability goals and aligns with evolving regulatory requirements for laboratory refrigerants.

Is the NU-99579VFT available for fast delivery?

Select NuAire ultralow freezer configurations are available through the QuickShip program, with shipment within 3–5 business days for in-stock models. Contact your local NuAire sales partner or visit nuaire.com/quickship for current availability.

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