A woodfire grill can be the heart of a kitchen or the thing that stops service dead. The difference is rarely the fire itself. It is the way the grill, bonnet and extraction system are designed to work together. This custom grill ventilation case study looks at the practical decisions behind a purpose-built live-fire installation – one designed to put flame in full view without filling the room with smoke.
For a restaurant, the brief is never simply to install a bigger grill. Fire cooking brings heat, ash, embers, grease, changing fuel loads and a level of theatre that a standard gas line cannot match. A good system protects the team, respects the building and gives the chef a station they can work hard, every night.
The brief: live fire without compromise
The project centred on a commercial parrilla built for serious service. The chef wanted adjustable cooking height, a broad grilling surface and room to work with hardwood coal and flame. They also wanted guests to see the ritual: meat hitting hot steel, fat catching fire, a cook managing heat with calm hands and a long-handled tool.
That last part matters. Put a grill too far back beneath a deep bonnet and it can feel like it has been hidden away. Put it too far forward, or underestimate the canopy and airflow, and smoke rolls into the pass or dining room. The goal was not to make fire invisible. It was to control it.
The design team began by mapping the realities of the station: where the cook would stand, how they would load wood, where ash would be removed, where hot tools could rest and how often the grill would run at full pace. Ventilation was considered alongside the grill from the outset, not bolted on after the steelwork was finished.
Custom grill ventilation case study: start with the fuel
Ventilation requirements change dramatically with the fuel source. Gas produces heat and combustion gases, but hardwood introduces smoke, sparks, fine ash and variable flame. A grill running on clean, well-seasoned hardwood does not behave the same way as one fed damp timber or overloaded with fresh logs during peak service.
That is why the firebox was treated as part of the ventilation plan. The custom parrilla was configured to give the chef control over where fuel burned and where the coal bed sat beneath the cooking surface. Rather than constantly chasing flare-ups, the operator could build a stable bed of embers, then use live flame with intent.
This does not eliminate the need for serious extraction. It does make the system more predictable. Predictability is what lets a chef cook a row of ribeyes, vegetables and fish over live fire without turning every busy service into a smoke-management exercise.
Capture matters more than brute force
A common mistake is assuming that more extraction power fixes everything. It can help, but airflow alone cannot compensate for poor bonnet placement or a grill that sits outside the capture zone.
The canopy needs enough depth and overhang to catch the rising plume from the entire cooking area, including the front edge where chefs often work hottest. It also needs to account for the way smoke behaves when a grill lid is lifted, a coal basket is moved or a flare-up pushes heat sideways before it rises.
In this case, the bonnet was planned around the grill’s true working footprint, not only its external dimensions. That distinction is crucial. A parrilla may have a neat steel frame, but the active fire zone extends to the coal drawer, the wood-loading side and the front of the grate where food is turned and basted.
The result was a station that kept the visual drama of an open grill while drawing smoke upward where it belonged. Guests could smell woodfire as part of the experience, not wear it home in their jackets.
Designing the grill for the person using it
Ventilation and ergonomics are tied together. If a chef has to reach too far under a bonnet, they will work awkwardly and slowly. If the bonnet sits too low, it can obstruct sightlines and make a powerful grill feel cramped. If it sits too high, capture can suffer.
The final grill height and bonnet position were resolved as a pair. The cooking surface sat at a practical working height, with an adjustable grate mechanism that allowed fast changes in heat exposure. The chef could lift delicate fish away from aggressive coals, then bring beef down close for a hard, smoky crust.
There was also clear access to the ash drawer and firebox. That may sound like a minor detail until service is moving and a cook needs to manage fuel safely. Ash removal, coal raking and wood loading should not force someone to step into a traffic path or work around hot, improvised obstacles.
A custom build earns its keep here. Standard equipment can be excellent within its intended role, but a woodfire station must respond to the room, the menu and the way the kitchen actually moves.
Heat, grease and cleaning are part of the engineering
Smoke gets most of the attention, but a commercial fire grill also produces intense radiant heat and rendered fat. Both affect performance and safety.
The custom parrilla used a cooking surface and drip-management approach suited to direct grilling. The point was not to prevent every flare-up – controlled flare is part of the flavour and theatre of live fire – but to stop excess grease from becoming an uncontrolled fuel source. When fat is managed properly, the chef gets char and smoke without losing command of the fire.
Materials mattered too. Heavy-duty steel components were selected for the punishment of daily heating cycles, scraping, ash and cleaning. Light-duty gear may look the part when it is new, but commercial woodfire cooking finds weak points quickly. Warped grates, seized mechanisms and thin fireboxes are not romantic after a few hard months of service.
Cleaning access was built into the design rather than treated as an afterthought. The grill could be cleared, scraped and maintained without dismantling half the station. The ventilation system also needs a regular cleaning programme, because grease and soot do not care how handsome the equipment looks.
Make-up air and the room around the grill
Extraction removes air. That air has to be replaced.
Without sufficient make-up air, a kitchen can develop negative pressure. Doors become difficult to open, smoke capture becomes erratic and the bonnet can struggle despite having a powerful fan. Cross-draughts from open doors, air-conditioning outlets or pass-through windows can also pull smoke away from the canopy.
For this installation, the wider kitchen environment was considered alongside the grill. The aim was stable airflow at the cooking line, not a blast of replacement air that would disrupt flame or make the chef’s station uncomfortable. It is a balance: enough air to support extraction, delivered in a way that does not fight the bonnet.
This is where early coordination with qualified ventilation professionals is essential. Local building requirements, fire safety provisions, mechanical design and certification all need to be addressed for the specific venue. A custom grill fabricator can build the fire station around the cooking brief, but the complete installation must be designed and approved as a system.
What the finished station changed
The clearest outcome was confidence. The chef had a grill that could be driven hard without forcing the team to work around its limitations. The cooking surface responded to the fuel, the bonnet captured the working plume, and the station remained open enough to keep live fire visible.
It also gave the menu more range. A well-managed parrilla is not only for thick-cut steaks. It can handle whole fish, blistered greens, skewers, bone-in poultry, flatbreads and slow, ember-driven cooking. The grill becomes a foundation for a kitchen’s identity rather than a single-purpose showpiece.
For guests, the effect is immediate. Fire creates anticipation before the plate reaches the table. There is smoke in the air, the sound of fat meeting coals and a crew working with real heat. When the ventilation is right, that atmosphere feels deliberate and generous rather than chaotic.
The lesson for any custom woodfire project
A beautiful grill is only half the job. The best custom installations are designed from the fire outward: fuel, cooking style, chef movement, capture area, extraction, make-up air, cleaning and the room itself. Leave any one of those elements until late and the compromise usually becomes obvious when the first busy service arrives.
For venues building around live fire, the right question is not, “How do we hide the smoke?” It is, “How do we build a station that lets the fire do its best work?” Get that right, and the grill becomes more than equipment. It becomes the place people gather, watch, eat well and remember.