Fresh Roast air roasters are probably the most popular entry point for home roasting, and there's a lot of tribal knowledge scattered across forums, Reddit, and YouTube. Let's collect the best of it here.
I've been roasting on an SR800 for years. Here's what I've learned:
Setup Tips
- Roast outdoors or in a well-ventilated space. Air roasters throw a lot of chaff and smoke, especially at medium-dark and above. A garage with the door cracked, a covered porch, or near an open window works well.
- Preheat matters. Run the roaster empty for 60 seconds on high heat before charging. It makes your first-crack times more consistent.
- Weigh your beans. Don't eyeball it. The SR540 sweet spot is 100-120g; the SR800 is 180-220g. Overfilling produces uneven roasts. Underfilling makes the beans fly around too aggressively.
During the Roast
- Start fan high, reduce gradually. I start at 9 and step down to 6-7 by first crack. This keeps the beans moving early (important for even drying) but slows airflow later so you don't cool the roast.
- Listen, don't just watch the clock. First crack sounds different at different batch sizes and ambient temperatures. The crack is the milestone, not the timer.
- The heat/fan controls are integers (1-9). RoastSource models these as discrete steps, not smooth curves. Each step is a meaningful change.
Mods
- Razzo V5T extension tube — The most popular SR800 mod. Increases capacity to 250g+ and gives the beans more room to circulate. Noticeably more even roasts on larger batches.
- Razzo V4T extension — Similar concept, slightly different airflow geometry. Both work well.
- External chaff collector — DIY or purchased. Keeps the built-in collector from filling up mid-roast on larger batches.
Common Mistakes
- Roasting indoors without ventilation (smoke detector will go off, ask me how I know)
- Not cooling beans fast enough after drop — keep the fan running at max with heat off, or dump into a colander and stir
- Trying to roast too dark on a small batch — air roasters move fast and it's easy to overshoot from City+ to French in 20 seconds
What tips would you add? What mods have you tried? If you're on a different roaster and curious about the Fresh Roast, ask away.