The spiral tunnel freezing method combines elements of both spiral and tunnel freezing technologies. It typically involves a spiral conveyor system enclosed within a tunnel-like structure.

This hybrid approach offers:

1. Extended freezing time
2. Efficient use of both vertical and horizontal space
3. Flexibility in product handling
4. Potential for multi-zone temperature control

This method is particularly suitable for products requiring longer freezing times or those benefiting from a gradual temperature reduction process. Factory managers dealing with complex product lines or limited floor space may find this solution especially valuable.