About This Document

The NuAire NU-99829VFT Ultralow Temperature Freezer Purchase Specifications (PSP-0034) 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, lab design submissions, and institutional procurement processes.

NU-99829VFT: High-Capacity Ultralow Storage at -86°C

When your program demands the highest sample throughput in a single upright footprint, the NU-99829VFT delivers. With 829 L (29.2 ft³) of usable storage and a calculated capacity of 60,000 samples at standard 10×10 density, this model is built for biobanks, core facilities, and high-volume research programs that require both scale and reliable ultralow performance.

Variable Frequency Technology modulates compressor output in response to actual thermal load, delivering stable -86°C performance with meaningfully lower energy consumption than conventional single-speed designs. ENERGY STAR® certification and UL listing confirm verified compliance with efficiency and safety standards. Learn more about NuAire’s approach to quality and sustainability: nuaire.com/about/quality-sustainability.

Variable Frequency Technology: Stable Temperature, Lower Energy Cost

The NU-99829VFT’s VFT compressor architecture continuously adjusts output to match real-time thermal demand rather than cycling at fixed full power. The result is reduced temperature fluctuation during normal access events, a more stable internal environment for sensitive samples, and lower kilowatt-hour draw compared to fixed-speed alternatives, a meaningful advantage in facilities managing heat load budgets and utility costs at scale.

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

High-Density Sample Storage and Interior Organization

The 829 L interior accommodates 24 frozen storage racks (2-inch) and 600 frozen storage boxes (2-inch) across three adjustable stainless steel shelves and a four-door inner compartment. A 5×5 rack configuration and calculated 60,000-sample loading capacity at 10×10 density make the NU-99829VFT well-suited for biobanks, core storage facilities, and programs consolidating samples from multiple smaller units.

The four-door inner compartment design limits warm air infiltration to a single section during sample access, protecting adjacent samples from thermal disruption. Vacuum-insulated panel (VIP) construction and CFC-free foam insulation reinforce the thermal barrier between the storage environment and ambient lab conditions.

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

Monitoring, Alarms, and Data Connectivity

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

The comprehensive alarm system covers high/low temperature with adjustable thresholds, high ambient temperature, start-up delay, sensor error, power failure, high/low voltage, voltage exceed, filter dirty status, hot condenser, door ajar, and low battery, providing full event notification for unattended and overnight operation.

Data connectivity includes a USB interface, remote alarm terminals, and a standard 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-99829VFT includes a 22-hour backup battery that maintains monitoring and alarm functions through extended power interruptions. Optional CO2 and LN2 backup systems are available for installations requiring active temperature maintenance during outages, critical for programs where sample replacement is not feasible.

NuAire’s service and sales partner networks provide local support for backup system planning, installation, and preventive maintenance: nuaire.com/sales-and-support/service-locator.

Certifications and Compliance

The NU-99829VFT carries a UL listing and holds ENERGY STAR® certification, confirming verified compliance with applicable safety 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-99829VFT Ultralow Temperature Freezer?

The NuAire NU-99829VFT 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 is UL listed and ENERGY STAR® certified.

How many samples can the NU-99829VFT store?

The NU-99829VFT provides 829 L (29.2 ft³) of storage capacity organized in a 5×5 rack configuration, accommodating 24 frozen storage racks (2-inch) and 600 frozen storage boxes (2-inch). Calculated sample loading capacity is 60,000 samples at 10×10 density across three adjustable stainless steel shelves.

How energy efficient is the NU-99829VFT?

The NU-99829VFT 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.

What happens to the NU-99829VFT during a power failure?

The NU-99829VFT includes a 22-hour backup battery to maintain monitoring and alarm functions during a power outage. Optional CO2 and LN2 backup systems are available to actively maintain internal temperature. Remote alarm terminals and USB data output support integration with laboratory monitoring and building management systems.

What refrigerant does the NU-99829VFT use?

The NU-99829VFT 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.

How does the NU-99829VFT compare to the NU-99579VFT?

The NU-99829VFT (829 L, 60,000 sample capacity) is the larger of the two Blizzard VFT upright models. The NU-99579VFT (579 L, 40,000 sample capacity) is the mid-range option. Both share Variable Frequency Technology, dual compressor architecture, hydrocarbon refrigerant, and a 22-hour backup battery. The right choice depends on storage volume requirements and available floor space.

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