Blizzard VFT NU-99729VFT -86°C Ultralow Freezer

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.

Performance data is available via touchscreen LCD display, USB data export, or RS-485 transmission to external monitoring systems. R290/R170 hydrocarbon refrigerant provides near-zero global warming potential, supporting current environmental compliance requirements and responsible laboratory practice. The NU-99729VFT accepts 100–230V / 50–60Hz electrical input. To request a quote or discuss your application, contact NuAire.

Frequently Asked Questions

What temperature does the Blizzard VFT NU-99729VFT reach?

The NU-99729VFT maintains temperatures from -40°C to -86°C with ±3°C temperature uniformity throughout the interior. Variable Frequency Technology continuously adjusts compressor output to sustain stable ultralow temperature storage.

What is the nominal capacity of the NU-99729VFT?

The NU-99729VFT has a nominal internal volume of 729 liters (25.7 cu. ft. nominal), storing up to 500 two-inch (5 cm) boxes across 20 racks, or approximately 50,000 two-milliliter vials.

Is the Blizzard VFT NU-99729VFT ENERGY STAR certified?

Yes. The NU-99729VFT is ENERGY STAR certified with measured energy consumption of 8.1 kWh per day. Two operating modes — High Performance and Energy Saving — allow labs to optimize for temperature control or energy efficiency.

How long does battery backup last on the NU-99729VFT?

The NU-99729VFT provides 22 hours of battery-backed alarm monitoring — covering temperature, power failure, door-ajar status, probe failure, condenser condition, and battery state throughout power interruptions.

What refrigerant does the NU-99729VFT use?

The NU-99729VFT uses R290 and R170 hydrocarbon refrigerants, both carrying near-zero global warming potential — supporting compliance with current and anticipated environmental refrigerant regulations.