Important to know…
Coffee roasting involves several distinct phases, each producing different emissions:
1. Roasting Phase: Beans are heated to internal temperatures between 200°C and 1,000°C, depending on the method. This releases steam, CO₂, vaporised oils, and chaff, all of which must be extracted.
2. Cooling Phase: Chilled air is blown over the beans generating dust, smoke, and residual vapours that also require venting.
3. Pyrolysis (in high-temperature roasters): This phase can push internal duct temperatures beyond 1,000°C posing a serious fire risk if not properly managed.
All these emissions are grease-laden and flammable and many roasters include integrated fans that create positive pressure in the ductwork. This makes pressure-tight, high-temperature exhaust systems essential
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The Role of the Chimney…
In industrial coffee roasting, heat recovery systems are increasingly integrated to improve energy efficiency. These systems capture waste heat from the roasting and cooling phases and repurpose it for:
• Hot water or steam generation
• Pre-heating combustion air
• Other on-site process needs
Jeremias flue systems are fully compatible with these setups, and our engineering team can assist in designing the ducting layout to optimise flow, minimise pressure loss, and maximise thermal recovery.
Whether you're designing a boutique roastery in a city centre or an industrial-scale coffee production facility, Jeremias UK delivers engineered exhaust solutions that protect your equipment, enhance your product, and ensure long-term safety and performance.
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Special considerations…
Jeremias UK offers a complete range of CE-certified flue systems for coffee roasting applications, including:
• DW-KL: A double-wall, mineral-insulated stainless steel system with a metallic conical seal, pressure-tight up to 5,000 Pa. Ideal for standard roasters operating up to 600°C.
• DW-ECO 2.0: Suitable for negative pressure systems or installations with lower thermal loads.
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Turnkey Engineering and Industrial Venting Solutions
For both artisan and industrial roasteries, Jeremias UK provides a complete turnkey service, including:
• Sizing calculations for optimal flue diameter and back pressure
• Fire resistance consulting and CE/UL compliance
• Custom-designed silencers to reduce noise from
integrated fans
• Static calculations for freestanding stacks, where required
• Multilingual technical support and full project management
• Installation by certified teams, with full commissioning and documentation
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