Hi. Refrigeration mans.
Now, I'm working with the tunnel freezer and we get a lot of moisture in evaporator fin space it cause of poor efficiency for freezing , we found that the high rate of outside air infiltrate to the freezer by evaporator fans.

Please help me to know or suggestions about How we calculation or else to define the internal dimension of the tunnel freezer in order to relate with number and cfm of evaporator fans ?
Thank you.
Nuntachai (Thailand)