Joper 15kg

the verdict

the 15kg sits in the transition zone between shop roaster and small production. 3kg minimum gives you flexibility for samples and test roasts. with manual controls and cast iron thermal mass, you can develop consistent profiles once you've logged enough batches to understand the machine's behavior. expect to roast 50-60kg per hour if you're efficient with back-to-back batches and short cooling times. natural gas operation with a modulating burner means you have good flame control, but you're adjusting it yourself. this model works for roasters who have outgrown a 5kg or 12kg and want to scale up without jumping to full automation. the cast iron adds weight and cost but pays back in heat retention and roast evenness. if you're comfortable reading the roast and making manual adjustments, this is a capable workhorse.