Coffee Roastery Layout: How Much Space a 3 kg, 15 kg or 30 kg Roaster Really Needs

Ask how much space a roastery needs and you will get an answer in square metres. That number is the least useful one you can have. A 200 m² unit with a 2.6 m ceiling and a 90 cm door will not take a 15 kg roaster. A 90 m² workshop with 4 m of clear height and a roller door will. Here is how to check a site properly, before the lease is signed.

Start with the machine, not the room

Every layout decision follows from four measurements of the machine itself: its footprint, its height, its weight, and the space it needs around it to be operated and serviced. These are the numbers to take to a site viewing.

Model	Machine size W × D × H (mm)	Net weight
EC-500G sample roaster	500 × 300 × 580	33 kg
DY-1 kg	1200 × 800 × 1100	130 kg
DY-2 kg	1200 × 850 × 1200	150 kg
SD-1.5 kg	1350 × 800 × 1150	130 kg
SD-3 kg	dimensions on request	230 kg
SD-12 kg Pro	2200 × 1300 × 2000	280 kg
YS-6 kg	2151 × 720 × 2000	600 kg
YS-12 kg / YS-15 kg	2290 × 1881 × 2279	758 kg

Two things jump out of that table. First, the jump in height: from a 1.1 m benchtop machine to a 2.28 m production roaster, which changes the ceiling question completely. Second, the jump in weight: 130 kg is two people and a trolley, 758 kg is a pallet truck, a rated floor and a planned route.

Around the machine, plan clear working space on every side you need to reach. In practice that means room to stand at the control panel and the trier, room to open the cooling tray and rake beans, and enough clearance behind and beside the machine that a technician can service the burner, the motors and the chaff cyclone without moving the roaster. If servicing requires disconnecting the flue and dragging half a tonne of cast iron across the floor, that maintenance will get skipped.

Add the chaff cyclone to your sketch as a separate object. On smaller machines it is integrated; on larger ones it stands beside or behind the roaster and needs its own access for emptying, which happens often.

Ceiling height is a roasting question, not a comfort question

This is the part most site checklists get wrong. Height is not about how the room feels. It is about where the exhaust goes.

A roaster’s flue wants to be short and vertical. Every extra metre of horizontal duct and every extra elbow adds resistance, and that resistance changes the airflow through the drum — which changes your roast profile, your development time and how your burner behaves. Common guidance is to keep the total duct run under about 20 metres with no more than two bends, and a duct much over 15 metres of vertical rise starts creating enough back-pressure to interfere with roasting.

A low ceiling forces the duct to travel sideways to find an exterior wall. So low ceilings do not just make the room warm; they degrade the machine’s performance and add cost at the same time.

Practical rule for a site visit: measure the clear height under the lowest obstruction — beams, sprinkler pipes, lighting trays, air-conditioning ducts — not the height to the deck. Then compare it against machine height plus the space needed above for the flue connection and for the cyclone to be opened. For a 2.28 m machine, a 2.6 m ceiling with a beam at 2.4 m is not a candidate.

Also check what is above the roof. Chimney rules in most countries follow the same logic: the termination must clear the roof by a set distance and rise above nearby structures so exhaust does not blow back into the building or a neighbour’s window. If the unit is overlooked by a taller building, raise the question with the installer early. And if the building has more than two storeys above your unit, expect the flue route to be the hardest part of the whole project. Our coffee roaster ventilation requirements guide has the detail.

The six zones and the one rule that connects them

A working roastery is organised as a one-way flow: green coffee enters at one end, roasted coffee leaves at the other, and nothing travels backwards through the production floor. Once product crosses its own path you get mixed inventory, contaminated batches and staff walking into each other all day.

1. Receiving and green storage. Needs delivery access — ideally a door a pallet can pass through — and a dry, stable, ventilated area away from heat. Bags stack, but not against exterior walls and not on the floor. See green coffee storage for the conditions that matter.

2. Pre-roast preparation. Weighing out batches, and where fitted, the green bean loader and silo and the destoner. This zone belongs immediately next to the roaster. Every metre between the scale and the drum is walked several times per batch, all day.

3. Roasting. The machine, the cooling tray, the cyclone, and where required the emissions equipment. This is the zone with the fire-safety clearances, the gas connection and the flue.

4. Cooling and rest. Roasted coffee needs to cool, then degas before it is sealed. Plan bins or trays and the bench space they sit on — see cooling and quenching.

5. Packaging and finished goods. Scales, filling, sealing, labels, cartons and finished stock. Note that roasted coffee occupies roughly twice the volume of the same weight of green coffee, and it cannot be stacked under pressure. Most first layouts under-size this room badly. Our coffee packaging equipment guide covers what usually goes here.

6. Cupping and quality control. Adjacent to production, but behind a wall or partition. Not for the look of it: the roasting floor runs hot and carries airborne chaff, and sensory judgements made in that environment are not repeatable. A quality lab in the roasting room is a quality lab that does not work. See cupping lab quality control.

Turning weekly output into floor area

Now the square metres — but derived, not assumed.

A widely quoted planning figure is that a small roastery needs about 100 m² to support production up to roughly 500 kg per week, adding around 50 m² for each additional 500 kg per week. As a starting point it is reasonable. As a rule it hides the variable that actually drives the number.

That variable is inventory days. Floor area in a roastery is mostly storage, and storage is set by how long you hold green coffee and finished stock — not by how much you roast. A roaster holding four weeks of green coffee needs roughly twice the storage area of one holding a week, at identical output. Before you accept any area figure, decide:

• how many weeks of green coffee you will hold, and in what unit (a 60 kg bag needs about a third of a square metre of floor, and stacks only so high);
• how many days of finished goods you will hold, at roughly double the volume per kilogram;
• whether packaging materials and cartons are stored on site.

Then add the fixed zones: the roaster and its clearances, the prep bench, the cooling and packing benches, the QC room, and a circulation route wide enough for a pallet truck.

One more allowance is worth arguing for at lease time: space for the machine you will buy next. Most roasteries that succeed outgrow their first roaster, and the second machine needs a footing, a flue route and a gas or electrical connection. Reserving that bay from the start is nearly free; adding it later usually means moving.

Six layout mistakes that cost money later

• Measuring the room but not the door. A 758 kg crate that will not pass the entrance is an expensive lesson. Measure the narrowest point of the entire delivery route, including turns.
• Ignoring floor loading. Concrete on grade is fine. Suspended floors, mezzanines and older upper storeys need to be checked, and a point load of three quarters of a tonne is worth an engineer’s opinion.
• Putting the roaster against a wall for tidiness. It looks clean and blocks service access to the burner and drive side for the machine’s whole life.
• Sizing packaging for green-coffee volume. Roasted coffee takes about twice the space. This is where most layouts run out of room first.
• No cleanout access on the duct run. Chaff and oil accumulate. If the duct cannot be opened and cleaned, that is both a fire risk and a failed inspection.
• Signing before confirming the roof penetration. The lease is the moment you have leverage. Get the flue route agreed in writing then, not during the fit-out.

What to check on the site visit

Take a tape measure and this list. Send us the answers and we can tell you which machines the site will accept.

1. Clear ceiling height under the lowest beam, pipe or duct.
2. Width and height of every door and turn on the delivery route.
3. Floor type and load rating.
4. Distance and route from the machine position to the nearest exterior wall or roof access.
5. Fuel available — natural gas, LPG, or electric only — and voltage and phase at the board. Machines up to 15 kg generally run on single-phase 220–240 V; from 60 kg upward, three-phase 380 V is standard.
6. Whether the landlord permits a roof or wall penetration.
7. Delivery access: can a truck reach the door, and can a pallet come off it?

From 30 kg upward this stops being a room and becomes a line: the machine ships with its loader, destoner and afterburner as an engineered set, and the layout drawing comes before the model number. If you would rather work from a drawing, send your floor plan with dimensions to our engineering team. We have been building roasters since 1990 and lay out these rooms regularly — from a single 12 kg coffee roaster in a workshop to full industrial coffee roaster lines.

Related reading: Coffee Roaster Installation Checklist: Five Deadlines from Lease to First Roast

FAQ

How much floor area does a small roastery need? Plan from your inventory rather than a fixed figure. A common planning number is around 100 m² for output up to about 500 kg per week, plus roughly 50 m² per additional 500 kg. Adjust it up if you hold several weeks of green coffee, and down if you buy weekly and ship out quickly.

What ceiling height do I need for a commercial coffee roaster? Take the machine height — a 12 to 15 kg production roaster stands close to 2.3 m — then add clearance above it for the flue connection and cyclone access. Measure to the lowest beam or pipe, not the roof deck. Low ceilings force long horizontal duct runs, which raise back-pressure and affect roasting.

Can I put a coffee roaster on an upper floor? Technically sometimes, practically rarely. A 12 kg class machine can exceed 750 kg on a small footprint, so the floor must be rated for it, and the flue has to run further with more bends. Ground floor with direct external access is materially cheaper and easier to permit.

How far should the roaster be from the wall? Far enough that a technician can reach the burner, motors, drive and cyclone without moving the machine, and that the operator can work the panel, trier and cooling tray comfortably. Manufacturer clearances also depend on whether nearby surfaces are combustible — confirm both before you fix the position.

Do I need a separate room for the roaster? Some jurisdictions require a fire-rated enclosure; many do not. Even where it is optional, separating the roasting zone from packing and quality control helps, because that room is hot and carries chaff. Ask your local authority for the requirement in writing before committing to a layout.

How much space does green coffee storage take? Estimate from bags. A 60 kg bag occupies roughly a third of a square metre of floor and stacks a limited number high. Multiply by the weeks of stock you intend to hold, then allow the same area again for finished goods, since roasted coffee takes about double the volume per kilogram.

Should I plan space for a second roaster now? Yes, if the lease allows it. Reserving a bay with a flue route and a utility connection costs almost nothing at planning stage. Adding a second machine to a full room usually means relocating the whole operation, which costs far more than the extra floor area ever would.

Final Thoughts

A site is suitable when four things line up: clear height for the flue, a delivery route the crate fits through, a floor that carries the load, and room for the zones to run one way. Send us your dimensions and your target kilograms per week, and we will tell you what fits — including the models to rule out.

Request a factory-direct quote or message us on WhatsApp at +86 184 0771 4607.

Last updated: September 23, 2026