Both manual and automatic sliding doors can be used for coldroom doors, but each option has its advantages.

Manual sliding doors are operated by pushing or pulling them along a track. They are often less expensive than automatic doors and require less maintenance since they have fewer mechanical components. However, they can be more difficult to operate when the coldroom temperature drops below freezing, and they may not seal as tightly as automatic doors.

Automatic sliding doors, on the other hand, are operated by a motor that opens and closes the door automatically. They are easier to operate and provide a more consistent seal, which can help to maintain the temperature inside the coldroom. However, they are more expensive to install and maintain, and they require a power source, which may not be readily available in some locations.

Ultimately, the choice between manual and automatic sliding doors for a coldroom will depend on factors such as cost, ease of operation, maintenance requirements, and the specific needs of the facility.