The refrigerant landscape is evolving rapidly. Regulatory pressure, sustainability targets, and supply-chain volatility are accelerating the industry’s shift away from high-GWP HFCs. For many future systems, A2L refrigerants are a low-GWP option—particularly where solutions are needed to balance performance, safety, and compliance.
But this transition is more than a refrigerant swap. With federal allocation limits tightening under the AIM Act, organizations face increasing risk of equipment becoming stranded—meaning systems designed for refrigerants being phased down may no longer be serviceable or compliant. The shift to A2Ls affects system design, safety controls, technician training, installation oversight, and Authority Having Jurisdiction (AHJ) approval. Organizations that plan ahead will avoid costly rework, compliance delays, and operational disruption.
Zero Zone goes above and beyond in testing the durability and resilience of its reach-in coolers and freezers to provide you with peace of mind. But sometimes, real life delivers the most demanding tests imaginable—ones that no laboratory can fully replicate.
In two separate real-world events, Zero Zone display cases were put to the test. One store was completely submerged under floodwater. Another experienced severe structural damage and flooding after a roof collapse. In both cases, the result was the same: the Zero Zone system and cases powered back on—and functioned as intended.
The Next Generation of Self-Contained Merchandisers
In an era where environmental responsibility meets retail innovation, the Guardian® Merchandiser stands as the sentinel of sustainability in retail refrigeration. Designed by Zero Zone, this self-contained refrigerated display case is more than just a product—it’s a statement of commitment to both performance and the planet. By using R-290 (Propane), these display cases are designed to meet current environmental standards and remain compliant well into the future.
Propane is a highly efficient refrigerant that delivers powerful cooling with minimal energy consumption. Its thermodynamic properties allow refrigeration systems to operate at lower pressures and with smaller compressor loads, making it perfect for self-contained refrigerated display cases.
The Guardian® Merchandiser is engineered for versatility and ease of use. With roof-mounted packaged refrigeration units (PRUs), retailers can enjoy plug-and-play simplicity that minimizes installation time and maximizes merchandising space. Available in 2 to 5-door configurations, the case supports low and medium temperature applications.
At Zero-Zone, our strategic priorities—organizational excellence, team development, and consistent communication—aren’t just guiding principles; they’re the foundation of how we operate and support our people. These values shape everything from daily interactions to long-term initiatives, creating a workplace where connection, collaboration, and pride in our work thrive. Whether you’re an intern just starting out or a long-term team member, you’re part of a culture that values growth, celebrates contributions, and builds community every step of the way.
The refrigeration industry is approaching a major transition. Under the American Innovation and Manufacturing (AIM) Act, the United States is phasing down the use of high-GWP refrigerants—most notably traditional HFCs. Starting January 1, 2026, these refrigerants will no longer be permitted in new commercial or industrial refrigeration systems. However, systems installed before this deadline can continue operating and be serviced throughout their useful life, provided repairs don’t result in a full system replacement.
The AIM Act, passed in 2020, directs the EPA to cut HFC production and consumption by 85% by 2036. This phasedown began in 2022 and is reinforced by the Technology Transition Rule, finalized in October 2023. This rule sets the maximum GWP limits for refrigerants in new systems. Each sector in the refrigeration industry has varying compliance dates. Understanding these compliance dates will help you make the right choice for the future.
As the refrigeration industry pivots toward environmentally conscious technologies, CO2 (R-744) systems are gaining traction for their low GWP and high efficiency. But with those advantages come a unique set of operational characteristics, and that means maintenance routines are a little different compared to traditional HFC/HFO systems.
Whether you’re already using CO2 systems or exploring a transition, understanding the nuances of preventative maintenance is essential to keep equipment running smoothly, safely and efficiently.
Why Preventative Maintenance Matters
All refrigeration systems benefit from preventative maintenance. The high operating pressures and sensitivity to moisture make consistent system checks a top priority.
Let’s break down the key maintenance tasks and what makes CO2 systems unique.
When it comes to refrigerated display cases, condensation is more than just an annoyance, it’s a barrier between your customers and your products. Fogged-up glass can mean missed sales opportunities and dripping water on the floor can create a slip hazard. This is why Zero Zone integrates anti-sweat technology into its refrigerated display. A hassle-free answer for retailers and store operators to keep their doors clear and clean while maintaining safe aisles.
In 1961, tucked into the rolling countryside of Pewaukee, Wisconsin, three refrigeration experts—George Johnson, Duke Wegner, and K. Hirata—converted a dairy barn into a workshop. An example in Midwest practicality. With a few tools, a lot of know-how, and a shared belief that refrigeration could be done better, they got to work. That barn became the birthplace of a company built on ingenuity—where resourcefulness, grit, and hands-on problem-solving weren’t just values; they were the business plan.
And it worked.
This month marks the 64th anniversary of Zero Zone. Since 1961, the company has focused on developing refrigeration systems that are efficient, reliable, and aligned with evolving industry needs. That focus continues today, with solutions designed to support energy savings, reduce maintenance, and maintain consistent product temperatures.
This blog highlights how Zero Zone’s technologies have contributed to commercial and industrial refrigeration—and how they continue to offer practical value.