When a commercial refrigeration unit starts failing, the instinct is to replace it with the same model or something close to it. On paper, it seems logical. The old unit fit the space, ran the load, and kept things cold. But a direct like-for-like replacement is one of the most common and expensive mistakes businesses make during a commercial refrigeration equipment upgrade.
The problem is that your operation today is rarely the same as when the original unit was installed. Menu changes, new product lines, higher throughput, even a kitchen renovation that altered airflow patterns. All of these shift the cooling demand. And the equipment market has changed too, with older refrigerants being phased out and Australian energy standards tightening over the past decade.
Before committing to a purchase, there are four areas that need proper evaluation. Getting even one of them wrong can result in a unit that underperforms, costs more to run, or requires additional infrastructure work after installation.
Why Like-for-Like Replacements Often Fail
The assumption behind a like-for-like replacement is that the original system was correctly specified. In practice, that is often not the case. Many commercial refrigeration units were undersized at the time of installation, either to reduce upfront costs or because the cooling load was underestimated during the initial fit-out. Over the years, the business adapted around the limitation without realising it.
On top of that, operational changes gradually increase demand. A restaurant that added a catering arm, a supermarket that extended trading hours, or a warehouse that increased pallet density. Each of these shifts raises the cooling requirement. Replacing the old unit with an identical spec locks in the same capacity shortfall and often makes it worse as the new unit struggles to keep up with a load it was never designed to handle.
What to Evaluate Before Replacing Your Commercial Refrigeration Equipment
Reassess Your Actual Operational Load
How Your Operation Has Changed Since Original Installation
The first step is an honest comparison between how the business operates now and how it operated when the current unit was installed. Consider the following changes:
- Trading hours (longer hours mean longer run cycles)
- Product volume and stock density
- Door opening frequency, particularly for display fridges
- Ambient temperature conditions (renovations, relocated equipment, or loss of climate control in the surrounding space)
- New product categories that require different temperature ranges
Any of these changes can push cooling demand well beyond what the original spec accounted for.
Signs the Original Unit Was Already Undersized
Some units were never right for the job. Common indicators that the original equipment was undersized include:
- The compressor running almost continuously, even during low-demand periods
- Temperature fluctuations that trigger food safety concerns
- Ice buildup on evaporator coils despite regular defrost cycles
- The unit consistently failing to reach the set temperature after restocking
If any of these have been ongoing issues, a same-spec replacement will carry the same problems forward.
Check Refrigerant Compatibility
What the R22 Phase-Out Means for Ageing Systems
If the unit being replaced uses R22 refrigerant, this is a critical decision point. Australia has been phasing out R22 (an ozone-depleting HCFC) under the Ozone Protection and Synthetic Greenhouse Gas Management Act 1989. Bulk R22 imports have been capped at approximately 45 tonnes per year since 2016, and from 1 January 2030, bulk imports will be banned entirely.
After 2030, servicing R22 systems will depend entirely on reclaimed refrigerant. That means rising costs, limited availability, and increasing difficulty sourcing parts for R22-compatible equipment. If your current system runs on R22, replacing it with a unit designed for a modern refrigerant is not just a regulatory consideration. It is a practical one.
Confirming Refrigerant Options for Your Replacement Unit
Modern commercial refrigeration equipment typically uses HFC refrigerants (such as R-134a or R-410a) or lower-GWP alternatives like R-290 (propane) and R-449A. However, HFCs are also being phased down under the Montreal Protocol, with Australia targeting an 85% reduction in HFC use by 2036.
When selecting a replacement unit, confirm the following with your refrigeration technician:
- Which refrigerant does the new unit use, and what is its long-term regulatory outlook?
- Is the refrigerant compatible with the existing pipework if you are connecting to a shared system?
- Does the replacement refrigerant require different pressure ratings or safety classifications?
These are not questions to leave until after the purchase.
Understand Current Energy Rating Requirements
Commercial refrigerated cabinets supplied in Australia must comply with the Greenhouse and Energy Minimum Standards (GEMS) Act 2012. The current framework for commercial units is set out in the GEMS (Refrigerated Cabinets) Determination 2024, which uses the Energy Efficiency Index (EEI) as the benchmark for minimum performance.
What this means in practice: a unit installed 10 or 15 years ago may have met the standards of its time, but a modern replacement must meet current MEPS thresholds. In many cases, newer units are significantly more energy efficient, which reduces running costs over the life of the equipment. When comparing options, request the GEMS registration ID and EEI for each model. A lower EEI means better energy performance within the same product class.
Audit Your Existing Infrastructure
Electrical Capacity
Modern commercial refrigeration equipment often has different electrical requirements compared to older units. Higher-efficiency compressors, digital controls, and variable speed drives may require updated wiring, different circuit breaker ratings, or dedicated power supply. Before purchasing, have a licensed electrician confirm that the existing electrical infrastructure can support the new unit without modification.
Pipework and Spatial Constraints
If the new unit connects to shared refrigeration pipework (common in supermarket or multi-unit setups), the pipe diameter, insulation, and layout need to be assessed. A replacement unit with a different refrigerant or higher capacity may require larger bore piping or modified line sets. Physical footprint matters too. Even a unit with the same cooling capacity may have different dimensions, clearance requirements, or ventilation needs. Measure the space and check manufacturer specifications before committing.
When You Need a Redesign, Not Just a Replacement
In some cases, the evaluation above will reveal that a straight replacement is not the right path. If the operational load has changed significantly, the existing infrastructure cannot support a modern unit, or multiple pieces of equipment need updating at once, it may be more cost-effective to redesign the system rather than replace individual components.
A commercial refrigeration system design takes a whole-of-site approach. It accounts for current and projected cooling loads, integrates energy efficiency from the outset, and ensures all components work together rather than operating as isolated units patched into ageing infrastructure.
Getting the Installation Right the First Time
Once the right equipment has been selected, how it is installed determines whether it delivers on its performance rating. Poor installation leads to refrigerant leaks, uneven cooling, shortened component life, and higher energy bills from day one.
Professional commercial refrigeration installation includes site inspection, cooling load verification, electrical and pipework assessment, and post-installation performance testing. It is the difference between a unit that works to spec and one that underperforms from the start.
If you are planning a replacement and want to make sure the new unit is correctly specified for your operation, Zeal Group’s ARCtick-licensed technicians can assess your site, cooling load, and infrastructure before you commit. Get in touch before you buy, not after.
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