The Real Answer to ULT Compressor Failure: No Compressor

Step back from the haze and hype swirling around our industry and ask yourself this simple question . . . Why are many ultra-low freezer manufacturers focused on providing backups and workarounds when a compressor fails? The obvious answer to this question is two-fold:

  1. Based on experience, everyone in our industry assumes that compressors will fail at some point.
  2. The biological materials stored in ULT freezers are incredibly valuable – virtually priceless to the researcher using the samples.

It is the acceptance of #1 and acknowledgement of the risk inherent in #2 that should lead ultra-low freezer buyers to question the “status quo” of using compressor technology, period. Every day, we see researchers trusting their priceless samples to the lowest ULT bidder and using an aging, failure-prone technology that is known for disrupting the preservation process.

Compressors needn’t be the “necessary evil” they have become in our industry when there is a field-proven, cost-competitive alternative. Of course, I’m referring to the free-piston Stirling engine that powers our freezers.

A Superior Technology with the Industry’s Best Standard Warranty

While the sustainability and energy saving benefits of Stirling freezer technology are increasingly acknowledged, the reliability advantages of the Stirling engine are not as well known. The superior design and quality of the Stirling cooling engine provide the foundation of our industry-leading 7-year standard warranty. You can read the blog post Myth #2: Energy Efficiency Must Compromise Reliability to learn more about this. Also, refer to the table below which compares key reliability factors of compressor cooling systems to the Stirling engine:

Reliability slide information

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