Moving into a new commercial kitchen is exciting. But it is also where practical questions suddenly become very real. One of these will inevitably be whether the commercial kitchen extraction and commercial kitchen ventilation are suitable for the way your business actually cooks, preps, stores and scales.
It is so easy to focus on the obvious things first. Where will the prep surfaces go? Have we got enough cold storage? Can the team move around without bumping into each other? Will the kitchen cope when orders double? All important questions. But if the extraction and ventilation are wrong, the whole setup can become uncomfortable, inefficient and make your kitchen setup challenging to work in.
Poor ventilation tends to make itself known pretty quickly. You’ll notice it when the kitchen feels too hot or too steamy or when odours travel further than they should. By then, you’re usually already trading, already busy, and already wishing you had asked better questions earlier.
So, before you move in, it is definitely worth taking a proper look at the kitchen setup. Not just to see if there’s a shiny canopy above the cookline, but whether the system is suitable for your menu, equipment, volume, hours, staff and growth plans.
Because ventilation is not just a building feature. It is a vital part of how your food business runs.
Why Commercial Kitchen Extraction Matters
A working kitchen produces heat, steam, grease, smoke, odours and airborne particles. Some menus produce more than others. Frying, grilling, chargrilling, wok cooking and high-volume roasting, for example, can place far more demand on an extraction system than light prep or baking.
Good commercial kitchen extraction helps remove those cooking fumes and contaminants from the working environment. Not only that, but it also helps control heat, manage odours, reduce grease build-up and make the kitchen a safer, more comfortable place for staff.
That last point matters more than people sometimes admit. A hot, smoky or poorly ventilated kitchen isn’t just unpleasant, it can affect concentration, energy levels, even staff morale and food safety. When the pressure is on, nobody needs condensation dripping or the air feeling heavy, making service almost unbearable.
Ventilation is not the exciting bit of scaling a food business, but it can quietly make or break the day-to-day experience.
Extraction vs Ventilation: What Is the Difference?
The terms are often used together, but they’re not exactly the same thing.
Commercial kitchen extraction usually refers to removing contaminated air from the kitchen. This is typically done through extraction canopies, ductwork, fans and filters that remove heat, grease, smoke, steam and odours from above cooking equipment.
But commercial kitchen ventilation is the wider picture. It includes the supply of fresh or replacement air, air movement through the kitchen, temperature comfort and how the whole system supports safe working conditions.
In simple terms, extraction pulls the unwanted air out. Ventilation makes sure the wider airflow works properly. And you need both.
If air is extracted without enough replacement air coming in, the kitchen can feel uncomfortable, doors may become hard to open, draughts may appear in odd places and gas appliances may not operate as intended. If fresh air comes in but cooking fumes are not properly captured, staff still end up working in poor conditions.
The secret sauce is getting the balance just right. Not too much, not too little, and definitely not fighting against the way the kitchen actually functions.
Start With Your Menu, Not the Metalwork
A common mistake is to assess a kitchen by looking at the extraction canopy first. The better starting point is your menu and equipment.
What are you cooking? How often? At what volume? Using what appliances? For how many hours a day?
A kitchen used for recipe testing at scale will have different needs from a production kitchen preparing high-volume takeaway meals. Bakeries have different ventilation pressures from a grill-led restaurant concept. A caterer preparing event food in batches may have intense production windows followed by quieter periods. And a delivery kitchen running multiple brands may have several cooking styles happening all in the same space.
Before you move in, map your cooking activity honestly. Include what you do now and what you expect to do in six to twelve months. It’s easy to plan for today’s orders. The harder, and usually smarter, thing is to plan for the level of demand you are aiming to reach.
Ask yourself:
- Will we be frying, grilling, steaming, roasting or baking?
- Will equipment run for long periods?
- Are we likely to add more appliances later?
- Will cooking happen in batches or continuously?
- Are we producing strong odours, grease or smoke?
- Will the same space be used for prep, cooking, packing and dispatch?
Once you understand that, you can judge whether the commercial kitchen extraction system is suitable for your real operation rather than a generic kitchen setup.
What a Good Commercial Kitchen Extraction System Should Do
A good extraction system should capture fumes and heat at source, remove contaminated air safely, filter grease effectively and discharge air in a suitable location. It should also be cleanable, maintainable and matched to the equipment beneath it.
In practical terms, look at the canopy position, canopy size, fan capacity, duct route, grease filters, access panels, fire safety considerations and whether the system is designed for the type of cooking taking place.
A canopy that does not properly cover the cooking equipment can allow heat, steam and grease to escape into the wider room. Poorly maintained filters can increase grease build-up. A weak or unsuitable fan may fail to remove air effectively. Ductwork that is difficult to access can make cleaning more complicated than it needs to be.
None of this is especially glamorous, but it is the stuff that helps a kitchen stay usable.
For growing food businesses, maintainability is a big one. If the extraction system is difficult to clean, awkward to inspect or expensive to access, it can quickly become a recurring headache. And recurring headaches are most definitely not part of the growth plan.
Make-Up Air: The Bit People Forget
When air is extracted from a kitchen, replacement air needs to come from somewhere. This is known as make-up air.
If a kitchen extracts large volumes of air but does not have a proper supply of replacement air, the environment can become uncomfortable and inefficient. You might notice draughts, stuffiness, uneven temperatures or doors pulling shut. In some cases, poor air balance can even affect the performance of gas appliances.
This is why commercial kitchen ventilation is about more than simply installing a powerful extract fan. More power is not always the answer. The system needs to be balanced, with enough fresh air supplied in a way that does not create uncomfortable working conditions or push contaminated air into clean areas.
It is also worth thinking about where air comes from. Air should not be drawn from dirty areas, waste zones or places where it could introduce contamination. A kitchen may look fine on paper, but airflow can reveal awkward design flaws very quickly once people start working in the space.
Odour Control in London Kitchens
In London, odour control deserves special attention.
Many commercial kitchens operate close to homes, offices, shops, schools, hotels or other food businesses. Even on industrial estates, there may still be neighbouring units, shared yards or residential developments nearby. Strong cooking odours can become a local nuisance if they are not properly managed.
This is particularly important for cuisines and cooking methods that generate distinctive smells, smoke or grease-heavy exhaust. Chargrilling, frying, spice-heavy cooking and long cooking hours can all increase the need for good odour control.
Before moving into a rented commercial kitchen space, ask where the extract discharges, how close it is to neighbouring properties, whether filtration is suitable and whether noise from fans could cause issues. A system that works technically inside the kitchen may still create problems outside the building if odour or noise is poorly controlled.
This is one of those areas where “we’ll sort it later” can end up costing you dear. If neighbours complain or the local authority becomes involved, you may have to make changes under pressure. Better to understand the risk before trading starts.
Grease, Cleaning and Fire Risk
Commercial kitchen extraction systems deal with grease as well as air. Over time, grease can build up in filters, canopies and ductwork. If cleaning is not managed properly, this can create hygiene issues, reduce performance and increase fire risk.
Before moving in, check how easy the system is to clean and maintain. Are the grease filters accessible? Is the ductwork inspectable? Are cleaning records available if the kitchen has been used before? Is there a clear maintenance schedule? Are responsibilities clear if the kitchen is shared by multiple operators?
This is especially important in higher-volume kitchens. The more grease your cooking produces, the more seriously you need to treat cleaning and maintenance.
For delivery brands, caterers and teams working in central production units, it is also worth thinking about peak periods. A kitchen may operate calmly on a quiet Tuesday morning, then work far harder during weekend production, festive catering or high-volume campaign periods. Your extraction system needs to cope with those real peaks, not daily averages.
Planning Permission and Local Authority Considerations
Depending on the site, new or altered commercial kitchen extraction may involve planning considerations. This is especially likely where ductwork, flues, external fans or discharge points affect the outside of a building, neighbouring properties or the wider street scene.
In London, this can vary by borough and by building. A kitchen in a mixed-use area may face different considerations from one in an industrial location. A listed building or conservation area can add further complexity.
Environmental health teams may also be interested in odour, noise, hygiene and whether the premises are suitable for the intended food activity. The exact route will depend on the nature of the premises and your operation, but the principle is the same: check early.
If you are moving into an existing kitchen, do not assume everything is automatically suitable for your business. The previous operator may have had a completely different menu, lower volume, shorter hours or different equipment.
A site that worked beautifully for one business may be a poor fit for another.
If you want to avoid retrofitting headaches, explore Dephna’s London locations to find a kitchen setup that already supports the way your food business needs to operate.
Why Ventilation Should Be Checked Before You Sign
It is tempting to get swept up by a good-looking space. Nice layout, good location, enough room for prep, perhaps access to cold storage nearby. All positive signs.
But ventilation needs to be part of the decision before you commit.
Once you have signed, moved equipment in and started onboarding staff, making major changes becomes more disruptive and expensive. You may need surveys, design input, permissions, access to duct routes, coordination with landlords and downtime for installation or modification.
Before you move in, ask:
- What cooking activity was the extraction designed for?
- Is the canopy suitable for our equipment?
- Where does the extract discharge?
- Is there adequate make-up air?
- Are odour and noise controls appropriate?
- Can the system be cleaned and maintained easily?
- Are maintenance records available?
- Does the setup support our growth plans?
These questions are not meant to slow you down. They are there to stop a promising kitchen becoming an operational bottleneck.
The Role of Ventilation in Recipe Testing at Scale
Recipe testing at scale is a useful example because it sits between product development and full production.
At small scale, a recipe might behave perfectly. Increase the batch size, add more appliances, extend the cooking time and suddenly the environment changes. More steam. More heat. More odour. More condensation. More pressure on prep and cooling processes.
If the ventilation is not up to the job, scaling becomes harder to judge. The issue may not be the recipe at all. It may be the kitchen conditions.
For food startups and growing brands, this matters. You need a space where testing reflects real production as closely as possible. Otherwise, you risk developing processes that work in theory but struggle when volume increases.
Good ventilation supports more consistent testing, more comfortable working and better control over the production environment. It is not the star of the show, but it helps the star perform.
Delivery Kitchens, Shared Kitchens and High-Volume Operations
Delivery kitchens and shared kitchen spaces often place intense demands on ventilation because they may operate for long hours, run multiple menus and use several cooking methods in the same site.
One brand might be frying. Another steaming. Another grilling. Another baking. Add the pace of delivery orders, courier movement and packaging activity, and the kitchen environment can become complicated quickly.
For these operators, commercial kitchen ventilation needs to support both cooking and workflow. Air movement should not interfere with packing, cooling or hygiene. Heat should not build up in areas where staff are working for long periods. Odours should not drift between units or into shared spaces.
If multiple businesses use the same premises, responsibilities need to be clear. Who maintains the system? Who cleans the filters? Who keeps records? What happens if one operator’s cooking style creates more grease or odour than another’s?
Shared environments can work very well, but only when the systems and responsibilities are properly thought through.
Cold Storage and Ventilation: Separate Systems, Same Bigger Picture
Kitchen extraction and storage solutions may seem like separate topics, but they are both part of the same operational setup.
If a kitchen gets too hot, refrigeration units may have to work harder. If airflow is poor, staff may move hot food, ingredients or packed products through the wrong areas just to cope. If storage is too far from production, doors may be left open too often or teams may create awkward workarounds.
A good food production setup considers the relationship between cooking, cooling, chilled storage, frozen storage, packing and dispatch. Commercial kitchen ventilation helps control the cooking environment. Cold storage helps protect ingredients and finished products. Together, they support a more stable workflow.
For growing businesses, this is where the right premises can make life easier. Not perfect, because kitchens are still kitchens, but easier.
Red Flags to Watch For
When viewing a potential kitchen space, there are a few warning signs worth noticing.
Heavy grease around canopies or filters may suggest cleaning has been neglected. Lingering smells can point to poor extraction, poor cleaning or unsuitable discharge. Condensation on walls or ceilings may indicate ventilation issues. Excessive heat during cooking can suggest the system is underpowered or poorly balanced.
Noise is another one. Loud fans may not bother you during a quick viewing, but they can become a real issue for staff, neighbours or nearby tenants. Also check whether the system has obvious access points for cleaning and maintenance. If nobody can explain how it is cleaned, that is not ideal.
And finally, be careful with vague reassurance. “It should be fine” is not the same as “this system is suitable for your equipment, cooking style and volume.”
Questions to Ask Before Moving Into a Commercial Kitchen
Before committing to a kitchen space, ask practical questions:
- What type of extraction system is installed?
- What cooking equipment is it designed to support?
- Has the system been recently serviced?
- Are duct cleaning records available?
- Are grease filters easy to remove and clean?
- Where does the extract air discharge?
- Is there odour control in place?
- Is there adequate replacement air?
- Can the system support longer hours or increased production?
- Who is responsible for maintenance and repairs?
The answers do not need to be complicated. In fact, clear and simple answers are usually a good sign.
Commercial kitchen extraction and commercial kitchen ventilation are not just technical details. They affect comfort, safety, hygiene, odour control, cleaning, equipment layout and the ability to scale.
For food businesses in London, the stakes can be higher because neighbours are often close, space is valuable and operations can grow quickly. Whether you are launching a catering business, expanding a delivery brand or moving production into a larger kitchen, it is worth checking the ventilation before you move in.
Not after the first smoky service. Not after the neighbour complains. Not after staff start avoiding the hottest corner of the kitchen.
Before.
Getting it right early gives your team a better working environment and gives your business more room to grow without unnecessary disruption.
If you are looking for a practical base to launch, scale or streamline your food operation, Dephna offers flexible kitchen and cold storage options in London to support your next stage of growth. Get in touch with us to discuss the right kitchen space for your next stage of growth.
Commercial Kitchen Extraction & Ventilation FAQs
Commercial kitchen extraction is the system used to remove heat, steam, smoke, grease, odours and cooking fumes from a kitchen, usually through canopies, filters, fans and ductwork.
Commercial kitchen ventilation is the wider airflow system that supports the kitchen, including extraction, replacement air and the overall movement of air through the space.
In short, yes. Most kitchens with cooking appliances need suitable extraction to manage heat, grease, fumes, steam and odours. The exact system needed depends on the equipment, menu, volume and layout.
It is much easier to identify issues before you move in than to fix them once you are trading. Poor ventilation can affect staff comfort, hygiene, odour control and day-to-day operations.
Make-up air is replacement air supplied to the kitchen to balance the air being removed by the extraction system. Without it, the kitchen can become uncomfortable and the extraction may not work properly.
Yes, poor extraction can lead to odour, smoke or noise issues, especially in dense areas of London where kitchens may be close to homes, offices or other businesses.
Cleaning frequency depends on cooking type and usage levels. Grease-heavy or high-volume kitchens usually need more frequent cleaning, and records should be kept as part of good maintenance practice.
Yes. When recipes move from small batches to larger production runs, heat, steam, odour and cooking times can change. Good ventilation helps create a more reliable and comfortable testing environment.
Cold storage and ventilation are separate systems, but they both shape the overall workflow. A hot, poorly ventilated kitchen can place more strain on refrigeration and make food handling less efficient.
Ask what the extraction system is designed for, whether it matches your equipment, where air is discharged, how odours are controlled, whether cleaning records exist and who handles maintenance.
Author Information
This article was co-written by…
Brindha, Sales Director
Our Sales Director, Brindha, knows her stuff when it comes to finding the perfect commercial kitchen or cold storage solution. With years of experience and a hands-on approach, she’s all about making life easier for food entrepreneurs so they can focus on what they do best – creating amazing dishes. When she’s not helping businesses thrive, Brindha’s out and about exploring the hottest food trends around London.
