One of the additions I'm planning for my uninsulated, metal roof and aluminum siding shop is a couple of the turbine style roof vents, the ones that rotate without a power source just from the rising hot air flow. Eventually, I'm planning to spray insulate the walls, install a drop ceiling where possible, and air condition the place. Right now the only source of ventilation is a 12 X 12 hole where a roll-up door will be eventually, and a 4 foot round shop fan.
Jerry
