Generally we do a double batch every brewday. We have six 1.5 bbl stainless and four 3 bbl plastic fermenters. This is the limiting factor for our capacity: we could brew night and day, but you have to have somewhere to put the beer. We also have two 3 bbl brite tanks, further increasing our capacity: after a double batch is done fermenting we can put it in one of our brite tanks for clarification and carbonation while we brew another batch.