I just did 11 gal of brown ale in 4.5 hours, including crushing the grain and cleanup, but I multitask. Figure 15 min to hit strike temp, 1 hr mash, 1 hr sparge, 1 hr boil, 30 min total cooling, and 15 mins to clean the kettle and put it away. Not really sure where that other 30 mins goes, probably time warping...