When purchasing a commercial underbench freezer, the upfront price is only one part of the total cost. A freezer operates 24 hours a day, so even a small difference in daily energy consumption can become a substantial operating expense over several years.
To provide a transparent comparison, we reviewed Australian Government GEMS registration data for two solid-door, two-door commercial underbench freezers:
- K-Master HS12-2F-N
- FED-X XUB6F13S2V
Both models are registered as horizontal refrigerated storage freezers, with an L1 temperature class and Climate Class 4 under the GEMS registration data. They are not identical in every dimension or operating specification, but they serve a similar two-door underbench freezer application and have a broadly comparable installation footprint.
What Is GEMS Registration?
GEMS stands for Greenhouse and Energy Minimum Standards. Commercial refrigerated cabinets covered by the relevant Australian requirements must be registered before they can be supplied in Australia.
The Australian Government Energy Rating Product Database records information including the product class, temperature class, climate class, registered net volume, daily energy consumption, Energy Efficiency Index and calculated star rating.
Commercial refrigerated cabinets are not required to display a household-style Energy Rating Label. However, their registered performance data can still be used to compare suitable models. The government recommends comparing products of a similar type, size and operating temperature.
Learn more about refrigerated cabinet energy ratings
GEMS Data Comparison
The following figures were taken from the Australian Government Commercial Refrigerators dataset dated 20 April 2026. Only the registered GEMS values are used for the energy comparison.
| GEMS registration data | K-Master HS12-2F-N | FED-X XUB6F13S2V |
|---|---|---|
| Registration number | ARC3282 | ARC1049 |
| Cabinet description | Storage Freezer Horizontal | Storage Freezer Horizontal |
| Cabinet type | Refrigerated Storage Cabinet | Refrigerated Storage Cabinet |
| Temperature class | L1 | L1 |
| Climate class | Class 4 | Class 4 |
| Registered net volume | 224L | 170L |
| Total energy consumption | 3.454kWh/24h | 7.566kWh/24h |
| Calculated star rating | 6.0 | 2.0 |
| Energy Efficiency Index | 34.14 | 81.92 |
| Registered test standard | ISO 22041:2019 | EN 16825 |
Important: Registered net volume is the volume recorded for GEMS testing and may differ from gross or marketed capacity shown in product literature. The registrations also reference different accepted test standards, so the results should be treated as a transparent comparison of published GEMS data rather than a side-by-side field test.
What Is the Difference in Daily Energy Consumption?
According to the registered data:
- K-Master HS12-2F-N: 3.454kWh per 24 hours
- FED-X XUB6F13S2V: 7.566kWh per 24 hours
- Difference: 4.112kWh per 24 hours
Under the published GEMS test data, the K-Master model records approximately 54.3% lower total daily energy consumption than the FED-X model.
Key result: The K-Master HS12-2F-N has a larger GEMS-registered net volume in this comparison while recording lower total daily energy consumption under the registered test data.
Estimated Annual Electricity Cost
The Australian Government provides the following basic method for estimating running costs:
Annual running cost = daily energy consumption × 365 days × electricity tariff
Because commercial electricity tariffs vary by business, location and energy plan, the table below shows three example electricity rates.
| Electricity tariff | K-Master estimated annual cost | FED-X estimated annual cost | Estimated annual difference |
|---|---|---|---|
| $0.30/kWh | $378.21 | $828.48 | $450.26 |
| $0.35/kWh | $441.25 | $966.56 | $525.31 |
| $0.40/kWh | $504.28 | $1,104.64 | $600.35 |
At an example tariff of $0.35/kWh, the estimated annual difference is approximately $525. If the same registered consumption figures and electricity rate are applied for five years, the calculated difference is approximately $2,627.
These figures estimate electricity usage charges only. They do not include supply charges, demand charges, maintenance costs or future electricity price changes.
Why Actual Running Costs Can Be Different
GEMS figures provide a consistent reference point, but they are laboratory test results rather than a guarantee of the amount shown on a particular business's electricity bill. Actual consumption can be affected by:
- Ambient kitchen temperature and humidity
- How frequently and how long the doors are opened
- The amount and temperature of food loaded into the freezer
- The selected operating temperature
- Ventilation clearance and proximity to cooking equipment
- Condition of door gaskets
- Condenser cleanliness and maintenance
- The electricity tariff charged to the business
For the most useful estimate, check the usage charge on your electricity bill and substitute that rate into the calculation.
Energy Use Is Not the Only Buying Consideration
Energy consumption is an important part of lifetime cost, but the correct freezer must also suit the kitchen and the food storage requirement. Before purchasing, compare:
- External width, depth and height
- Doorway, corridor and delivery access
- Required storage capacity
- Manufacturer-stated operating temperature range
- Ventilation and installation clearance
- Warranty terms and service availability
- Purchase price and delivery cost
The K-Master and FED-X models in this article are not dimension-for-dimension identical, and their manufacturer-stated operating ranges differ. Businesses requiring a particular cabinet depth or operating temperature should confirm the complete current specifications before making a decision.
About the K-Master HS12-2F-N
The K-Master HS12-2F-N is a two-door commercial underbench freezer designed for cafés, restaurants, takeaway shops and other foodservice businesses that require accessible frozen storage beneath a working-height cabinet.
The current K-Master product specifications include a 1,200mm width, fan-forced cooling, R290 refrigerant, adjustable shelving, digital temperature control and automatic defrost. Customers should review the current product page for complete specifications, stock status and pricing.
View the HS12-2F-NAsk K-Master a Question
Frequently Asked Questions
How do I calculate the annual electricity cost of a commercial freezer?
Multiply the registered daily energy consumption in kWh by 365, then multiply the result by your electricity usage rate. For example: 3.454kWh × 365 × $0.35/kWh = approximately $441 per year.
Does GEMS energy consumption equal my actual electricity bill?
No. GEMS data is based on standardised testing and is useful for comparing registered products. Actual costs depend on operating conditions, usage, maintenance and the business's electricity plan.
Why is GEMS registered net volume different from the advertised capacity?
Registered net volume is determined and recorded for the relevant GEMS test method. Product pages may also display gross or other capacity measurements, so comparisons should use the same type of volume figure for both models.
Does lower energy consumption automatically make a freezer the right choice?
No. Energy use is one factor. The freezer must also provide the required operating temperature, storage capacity, dimensions, access requirements, warranty and service support for the business.
Sources, Method and Disclosure
This comparison uses the Australian Government Commercial Refrigerators CSV published through data.gov.au and dated 20 April 2026. The data was checked on 17 July 2026.
- Australian Government commercial refrigerator registration dataset
- Australian Government refrigerated cabinet guidance
- Australian Government running-cost calculation guidance
K-Master sells the K-Master product discussed in this comparison. FED-X is a third-party brand and is not affiliated with K-Master. Product registrations, specifications, pricing and availability may change. Readers should verify the current GEMS registration and current manufacturer specifications before purchasing. Estimated running costs are general information only and are not guaranteed savings or financial advice.