What is the best style of hay barn

I'm currently looking at building a new hay barn. I was thinking of building a barn with boards on the walls,,, this to allow air into the building for better ventilation. I think this might allow some rain and also some snow in the building ? I was also thinking of building an all steel building , but I think this might keep the moisture in the building that the hay expires.
Any advice would be greatly appreciated

What is the best style of hay barn