Whether the workers are coming out or going in the cold room; taking in or taking out materials; the only thing you would want to focus on is prevent the energy loss. Every time the door is opened, the temperature of the cold room increases between four to ten degrees Celsius. In order to prevent this loss, it can reduce heat loss. The positioning of the cold room curtain is done to completely cover the entryway. It does not mean that the access to the cold room is hindered.