Freezing load test packages are a fundamental component in refrigerator and freezer performance testing. They are widely specified in international standards to ensure consistent, repeatable, and comparable test results when evaluating thermal performance and energy efficiency.
As a professional manufacturer of laboratory testing equipment, Sinuo Testing Equipment Co., Limited has been supplying freezing load test packages that comply with major international standards, supporting laboratories, certification bodies, and appliance manufacturers worldwide.
A freezing load test package is a standardized thermal mass designed to simulate real food loads inside refrigeration appliances during testing. By controlling the size, material, and weight of the test package, test results can be compared reliably across different laboratories and regions.
Test package specifications vary depending on the applicable standard, climate conditions, and testing objectives.
IEC 62552 Standard Test Packages
IEC 62552 is one of the most widely adopted international standards for household refrigeration appliances. Under this standard, freezing load test packages are typically categorized into −1 °C and −5 °C types.
Commonly used dimensions and corresponding weights include:
| Dimensions (mm) |
Weight (g) |
Dimensional tolerance |
Weight tolerance |
| 25x50x100 |
125 |
When the side length is 25mm~50mm, the allowable deviation is ±2mm. When the side length is 100mm~200mm, the allowable deviation is ±3mm. |
±2% |
| 50x50x100 |
250 |
| 25x100x100 |
250 |
| 25x100x200 |
500 |
| 50x100x100 |
500 |
| 50x100x200 |
1000 |
Sinuo Insight:
Sinuo provides IEC 62552 compliant test packages with controlled material density and strict dimensional inspection, ensuring stable thermal performance throughout long-term laboratory use.
IEC 62552 M-Type Test Packages
M-type test packages are designed for applications requiring direct temperature measurement. These packages integrate a thermocouple or pre-installed copper tube in direct contact with the filling material.
| Dimensions (mm) |
Weight (g) |
Dimensional tolerance |
Weight tolerance |
| 50x100x100 |
500 |
50±2mm
100±3mm |
±2% |
Sinuo Solution:
Sinuo’s M-type test packages are manufactured with precise sensor positioning, allowing accurate temperature acquisition and minimizing measurement deviation during testing.
Australian Standard Test Packages
Australian Standard Test Packages are primarily used for performance and energy efficiency testing of household refrigerating appliances in Australia and New Zealand. Their technical requirements are derived from the following standard system: AS/NZS 4474.
| Dimensions (mm) |
Weight (g) |
Density (Kg/m³) |
Weight tolerance |
| 25x50x100 |
When the side length is 25mm to 50mm, the allowable deviation is ±2mm; when the side length is 100mm to 200mm, the allowable deviation is ±4mm. |
480±80 |
±2% (mass is calculated from density and volume) |
| 25x100x100 |
| 50x100x100 |
| 37.5x100x200 |
| 50x100x200 |
Under Australian standards, freezing load test packages are mainly classified into two types: substitute test packages and standard test packages.
Substitute test packages are simplified test packages designed for specific testing scenarios, aiming to reduce test complexity or shorten testing time.
Standard test packages, on the other hand, represent the full standard configuration and are typically in the form of meat-simulation (beef) test packages, which are the most commonly used type in laboratory testing.
Substitute test packages
Standard test packages
Engineering Note:
By controlling both density and moisture content, Sinuo ensures that Australian standard test packages maintain consistent thermal behavior across different test cycles.
Sawdust Test Packages
(AHAM HRF-1:2007 / SASO 2664-2007)
Under AHAM HRF-1 and SASO 2664 standards, test packages are manufactured using compressed hardwood sawdust as the primary filling material.
Key characteristics:
- Stable thermal behavior
- Cost-effective and durable
- Suitable for long-term commercial testing
| Dimensions (mm) |
Weight (g) |
Density/Tolerance (Kg/m³) |
| 130×100×40 |
291±41 |
560±80 |
M-type variants are also available with integrated thermocouples or copper tubes.
North American Commercial Test Packages
(AS72-2005 Standard)
For commercial refrigeration testing in North America, AS72-2005 specifies filling-type test packages.
| Dimensions (mm) |
Weight (g) |
Density/Tolerance (Kg/m³) |
| 52 × 100× 100 |
±2mm |
≥473ml |
Sinuo Capability:
Sinuo offers both standard and M-type sawdust test packages, produced with controlled compression processes to ensure uniform density and repeatable test performance.
Conclusion
Selecting the correct freezing load test package is essential for achieving accurate and repeatable refrigeration performance test results. Understanding the requirements of different international standards helps laboratories and manufacturers make informed decisions.
By combining technical expertise with standardized manufacturing processes, Sinuo continues to support customers worldwide with reliable freezing load test solutions.
Contact Sinuo today to learn more about our products!
Tag: Energy Efficiency Test Chamber , freezing test chamber , IEC62552 , test package , freezing load package
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