Coffee Roaster Afterburners

About Coffee Roaster Afterburners

A coffee roaster afterburner burns off the smoke, odor, and volatile compounds coming off your drum during roasting, so your exhaust stays within local air quality limits and your neighbors stay happy. This collection covers both new and used coffee roaster afterburners from names like Diedrich and Probat, sized for shop roasters up through larger production lines. Every listing shows condition, BTU rating, and the roaster size it's built for, so you can match a unit to your setup before you buy. Already have your roaster picked out? Pair it with the right afterburner size below.

Why a Coffee Roaster Needs an Afterburner

Roasting coffee releases smoke, chaff particles, and volatile organic compounds as beans develop through first and second crack. An afterburner pulls that exhaust through a combustion chamber and reburns it at high temperature, cutting visible smoke and odor by a wide margin before it leaves your vent stack. For roasteries near homes, retail strips, or shared industrial space, that difference is often what keeps the neighbors and the local air district off your back.

Thermal vs. Catalytic Afterburners

Thermal afterburners rely on high heat alone, typically in the 1,250 to 1,400°F range, to break down smoke and odor compounds. Catalytic afterburners use a coated catalyst bed to trigger the same reaction at a lower temperature, which usually means lower gas usage over time. Both styles show up in this collection, and the right pick comes down to your roaster's exhaust volume, your budget for ongoing fuel cost, and how strict your local air permit requirements are.

Matching an Afterburner to Your Roaster

Afterburners are rated by SCFM (standard cubic feet per minute) and BTU output, and both numbers need to line up with your roaster's exhaust volume. A unit sized for a 12kg drum won't keep up behind a 60kg roaster, and an oversized afterburner on a small roaster just burns extra gas for no real benefit. Check the roaster size listed on each afterburner, whether it's a new or used unit, and compare it against your own drum capacity before you buy. If you're not sure what you need, our team can help you cross-reference roaster and afterburner specs.

Afterburner Alternatives

A traditional combustion afterburner isn't the only path to cleaner exhaust. Wet scrubber and electrostatic filter systems pull smoke and chaff out of the airstream without an open flame, which can suit roasters with tighter space, lower gas access, or specific permit requirements. Browse our Indumax filter systems for a non-combustion option worth comparing against a standard afterburner.

Shopping by Roaster Brand

Several of the new and used afterburners in this collection are built to pair with a specific roaster line. If you're running a Diedrich roaster, look for a DCO model sized to your IR series. Probat owners should check listings built around the TO-2 and similar Probat-compatible units in our Probat collection. Matching brand and model first narrows the field fast, even if the afterburner itself isn't a Probat or Diedrich part.

New to buying used roasting equipment altogether? Our guide to buying a used coffee roaster covers sizing, inspection, and what to ask a seller, and applies just as well when you're shopping for the equipment that supports your roaster.