Currently working on laying out a 1 story office building with a mezzanine. The office building is to be built within an existing warehouse with 2 sides facing the warehouse space. 1st floor return will be through a plenum space while mezzanine return will be ducted. In order to control building over pressurization im considering just ducting from lay-in grilles in the ceiling of each space to barometric relief dampers, set to open @ 0.05" w.g., placed on the warehouse side walls of the office space.
Was wondering if anyone had tried anything similar and their results, or just any general critiques of the situation. Thanks in advance.