We have expanded metel in the opening. The Idea behind the whole container is so that we can move it if need be. If we need to relocate it we can just drop the intake and exhaust hoods and set it on a truck and go.

The amount of air flow was calculated based off of the CFM of the total number of miner fans. The size of the opening in the container meets the requirements of the ventilation fans we are using. The fans we are using is just a whole house fan from homedepot they are like $200 shipped and move like 5400 CFM each.

Sam