Greener Science: Energy Efficiency in ULT Freezer Use

In today’s age of climate awareness, laboratories must think beyond performance: sustainability is becoming equally important. Ultra-low temperature (ULT) storage is vital in many scientific fields, but standard units often consume huge amounts of power. The -86 Deep Freezer is no exception—it delivers the extreme cold required for sample preservation, but demands thoughtful operation to balance energy use.

One way to address this is by fine-tuning the set-point. Studies show that modestly raising the temperature from –80 °C to –70 °C can reduce energy consumption by about 30%. While this may sound like a compromise, in many cases the stability of biological materials is still maintained at these warmer settings, making it a practical option for labs seeking efficiencies.

Another strategy involves optimizing location and ventilation. The Industrial ULT Freezer demands strategic placement: allow enough clearance around the unit for airflow, and avoid stacking items on top. Proper spacing and good HVAC design contribute to efficient heat rejection and reduced stress on the compressor system.

Maintenance practices also play a major role. Annual defrosting not only prevents ice buildup but also improves operating efficiency. Cleaning condenser filters and vacuuming accumulated dust helps maintain airflow and system stability. By regularly brushing door gaskets free of frost, labs can improve seal integrity and minimize the workload on refrigeration circuits.

At Zhejiang Heli Refrigeration Equipment Co., Ltd., we place energy-conscious design at the center of our R&D. Our Industrial ULT Freezer models incorporate efficient insulation, dual-stage compressors, and optimized airflow pathways to help reduce power draw without compromising performance. These design choices contribute to a lower carbon footprint over the product lifespan.

Beyond the hardware, we advise clients on operational best practices: developing sample inventories, monitoring usage patterns, and training lab staff to minimize door-opening time. Such system-level thinking—equipment plus behavior—is key to achieving meaningful sustainability gains.

By adopting both efficient technology and mindful usage, labs leveraging a -86 Deep Freezer can support critical scientific work while minimizing environmental impact. It’s not just about preserving samples—it’s about preserving the planet.