Cincinnati Sub-Zero

Reliability, performance, value & service for complete customer satisfaction.

CSZ is committed to customer satisfaction from the initial point of contact in understanding the test application and developing the right solution to meet and/or exceed our customers’ needs from design to delivery and after sale support.

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Exclusive Tundra® Refrigeration System

Our exclusive Tundra® refrigeration system offers increased performance, rapid temperature change rates, increased live load capacity, reduced utility and maintenance costs, with high reliability and quiet operation. The Tundra system provides cooling down to the low temperature of -45ºC or -54ºC (-49ºF to -65ºF) and may be included in almost any CSZ environmental chamber. Ask your CSZ sales representative how the Tundra can reduce your costs and your testing time.

Custom Capabilities/Designs

CSZ leads the market in custom-designed environmental chambers. Our experienced engineering and design team can create custom solutions for your highly specialized requirements.


With over 75 years in the industry, you can be confident that you are purchasing the best environmental chamber in the industry. Our technical sales and applications specialists are available to solve your most challenging environmental test application. Our years of combined engineering and manufacturing experience ensure solid designs and products.


The quality design and engineering of our products are known throughout the industry. We ensure the quality and reliability of every product we manufacture with design review meetings, incoming and in-process inspections, vendor auditing, and validation testing. Our ISO-9001:2008 certification, combined with our quality processes ensures you are purchasing the most reliable chamber in the industry.

Service - Nationwide - Responsive

Our dedication to customer service continues long after the sale with start-up, training, technical support, spare and replacement parts, systems upgrades, and preventative maintenance programs.

Contract Testing Services

Our contract test laboratories are A2LA accredited to provide validation of your product's test results and handle overflow during your peak testing periods. Customer Focused - Customer Driven At CSZ, we believe it is vital to our business to listen to the wants and needs of our customers. The feedback our customers provide helps us to improve our product designs and continuous improvement efforts. Click here to send us your feedback.

Diverse Product Mix

CSZ offers a broad range of both standard and custom-designed environmental test chambers tailored to meet your design requirements.