San Franciscan SF-25

the verdict

the SF-25 handles 2 to 11 kg per batch, which puts it in the range for roasteries moving past startup phase or cafes with steady wholesale demand. at the top end, you can roast roughly 25 pounds of green per batch and cycle through multiple roasts per hour for mid-volume production. like the rest of the San Franciscan line, it's a manual machine: you control gas and airflow in real time, which gives you flexibility and fast response but also means you're hands-on for every roast. the SF-25 uses four identical motors for drum rotation, cooling tray sweep, hot air fan, and cooling fan, all built with the same schedule 40 steel drum and hand-fabricated construction. if you're profiling lots frequently or want to develop roast skills without automation, the SF-25 offers the capacity to grow. if you need computerized profiles or plan to hire less experienced roasters, the manual workflow may become a bottleneck.