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Kitchen extraction cleaning - dark kitchens
In a dark kitchen or ghost-kitchen site, several operators cook under shared or adjacent extraction - and that raises a question routine kitchens don't face: who is responsible for cleaning the extraction? Shared canopies and split duties can leave the fire-risk-critical cleaning falling through the gaps. Here is how dark kitchen extraction responsibility works, and how to avoid gaps. This is general commentary, not legal advice.
The short answer
Dark kitchens (also called ghost kitchens or cloud kitchens) - sites where several separate food businesses operate from individual units, usually cooking for delivery - raise an extraction question that a single, self-contained kitchen does not: who is responsible for cleaning the extraction, when it is shared? The shared-extraction situation: in a dark kitchen, the extraction may be shared or connected across operators - a shared canopy serving several cooking units, or separate canopies feeding into shared or connected ductwork and a common extract system, or a mix. So the extraction is not neatly one operator's own system; parts of it are shared or common. This splits and can blur the responsibility for cleaning it: each operator is responsible for their own cooking and unit, but the shared canopy or common ductwork serves several - so who cleans that? The individual operators, the site operator/landlord (who owns the building and the common systems), or some shared arrangement? The risk of unclear responsibility: if the responsibility is unclear or unallocated, the fire-risk-critical extraction cleaning can fall through the gaps - each operator assuming the site operator or the others do it, the site operator assuming the operators do, so the shared/common parts (especially the shared ductwork) get cleaned by no one. This leaves a growing grease build-up and fire risk in the shared system, with no one owning it - a serious, and surprisingly common, exposure in dark kitchens. How to avoid the gaps: clarify the responsibility, in writing (in the leases/agreements and a clear cleaning arrangement) - who is responsible for cleaning which parts (each operator's own canopy/unit, and the shared/common ductwork and extract system), how it is coordinated (so the whole system gets cleaned, compatibly), who arranges and pays, and who holds the records - so the whole extraction gets cleaned, by an identified responsible party, with no part left because the duty was unclear. So dark kitchen extraction, with shared canopies and split duties, needs the responsibility clearly allocated so the fire-risk-critical cleaning does not fall through the gaps. So clarify who cleans what to keep the shared extraction clean and safe. This is general commentary on dark kitchen extraction, not legal advice; check your leases and arrangements.
Key points
Shared extraction
The distinctive extraction situation in a dark kitchen is that the extraction is often shared or connected across several operators - not a single self-contained system as in an ordinary kitchen. A dark kitchen site houses several separate food businesses, each cooking from its own unit (usually for delivery). But the extraction serving them may be shared or common: a shared canopy over several cooking units, or separate canopies feeding into shared or connected ductwork and a common extract fan/system, or some combination. So while each operator has their own cooking, the extraction (or parts of it) may serve several operators together.
This shared or connected extraction is different from an ordinary kitchen, where one operator has their own self-contained extraction system (their canopy, their ductwork, their fan) and clearly owns its cleaning. In a dark kitchen, the extraction is (partly) shared - so it does not neatly belong to one operator, and the responsibility for cleaning it is not automatically clear. The shared parts (a shared canopy, common ductwork) serve several, so whose job is it to clean them? This is the crux of the dark-kitchen extraction question: shared extraction means the cleaning responsibility is split or shared, not neatly owned. Understanding that the extraction is shared/connected is the starting point for sorting out who cleans it. So shared extraction - several operators, one (partly shared) system - is the situation. So several operators sharing one system is the situation. This is general commentary.
Split or blurred duties
Because the extraction is shared, the responsibility for cleaning it is split or blurred - raising the question of who actually cleans which parts. In an ordinary kitchen, the operator cleans their own extraction - clear. In a dark kitchen, it is less clear: each operator is responsible for their own cooking and their own unit (and any extraction that is solely theirs), but the shared canopy or common ductwork serves several operators - so who is responsible for cleaning those shared parts? The possibilities: each operator (contributing to or arranging the cleaning of the shared parts); the site operator or landlord (who owns the building and the common systems, and might take responsibility for the shared extraction); or a shared/collective arrangement (the operators together, or via the site operator, arranging and sharing the cost).
Which of these applies depends on the specific site's setup and agreements (the leases/licences, and any cleaning arrangements) - and crucially, it needs to be clearly established, because it is not automatic. The danger is that the responsibility is blurred or unallocated: the operators assume the site operator handles the shared extraction, the site operator assumes the operators do, and the leases/agreements may not clearly say. So the duty for the shared parts is split or blurred, and can end up owned by no one. This is the problem: shared extraction with split or blurred duties means the responsibility for cleaning the shared parts may be unclear - which, as the next section covers, risks the cleaning being missed. So split or blurred duties raise the question: who is responsible for cleaning it? So who is responsible is the key question. This is general commentary, not legal advice.
The gap risk
The real danger of split or blurred extraction duties in a dark kitchen is that the fire-risk-critical cleaning falls through the gaps - each party assuming another does it, so the shared parts get cleaned by no one. When responsibility for the shared extraction (the shared canopy, the common ductwork and extract system) is unclear or unallocated, the classic gap opens: each operator assumes the site operator, or the collective, or the others handle the shared extraction; the site operator assumes the operators handle it; and so the shared parts - especially the common ductwork, which no single operator sees as theirs - get cleaned by no one. Everyone thinks it is someone else's job, so it does not get done.
This is a serious exposure, because the shared extraction still builds up grease (from all the operators' cooking) and carries a fire risk - so a shared, uncleaned extraction system accumulates a growing grease build-up and fire risk that no one is controlling, in a site with multiple operators and cooking lines. And a fire in the shared extraction would threaten the whole site. So the gap is not trivial: it is an uncontrolled, growing fire risk in a shared system, arising simply because the cleaning responsibility was unclear. This gap is a real and common problem in dark kitchens - the shared extraction (particularly the common ductwork) neglected because no one owns its cleaning. So the gap risk is the cleaning falling through the cracks of split, unclear duties - leaving the shared extraction fire risk uncontrolled. So cleaning falling through the cracks is the gap risk. This is general commentary.
Closing the gaps
The way to avoid the gap is to clarify the extraction cleaning responsibility, in writing, so it is clearly allocated and coordinated - and the whole system gets cleaned by an identified responsible party. Clarify who cleans what: establish, clearly and in writing (in the leases/agreements and a cleaning arrangement), who is responsible for cleaning which parts of the extraction - typically each operator for their own canopy/unit (any extraction solely theirs), and a clearly-identified party (the site operator/landlord, or a collective arrangement) for the shared/common ductwork and extract system. So every part of the extraction has an identified owner for its cleaning - no part left unallocated.
Coordinate the cleaning: because the system is shared/connected, the cleaning needs coordinating so the whole system gets cleaned compatibly (the shared ductwork cleaned as one job, coordinated with the operators' parts) - often best arranged centrally (by the site operator) for the shared parts, with the operators' cooperation. Arrange, pay and record: establish who arranges and pays for the shared-extraction cleaning (a shared cost, or the site operator recovering it), and who holds the records (the reports and certificates for the shared system) - so the cleaning is arranged, funded, done, and evidenced. So closing the gaps means clarifying the responsibility in writing, coordinating the cleaning of the shared system, and sorting the arranging, paying and recording - so the whole extraction gets cleaned, by identified parties, with nothing left because the duty was unclear. So clarify who cleans what, in writing, to close the gaps. So clarify who cleans what closes the gaps. This is general commentary, not legal advice.
No part left unowned
So dark kitchen extraction, with its shared canopies and split duties, needs the cleaning responsibility clearly allocated so the fire-risk-critical cleaning does not fall through the gaps: the extraction is shared/connected across operators, so the duty to clean it is split or blurred, which risks the shared parts (especially the common ductwork) being cleaned by no one - a growing, uncontrolled fire risk. The answer is to clarify, in writing, who cleans what, coordinate the shared-system cleaning, and sort the arranging, paying and recording - so no part is left unowned. So ensure the whole shared system gets cleaned, by identified parties.
This connects to keeping the whole shared extraction clean and safe - which requires the coordination the dark-kitchen situation makes necessary. In an ordinary kitchen, one operator cleans their own whole system; in a dark kitchen, the whole system (including the shared parts) only gets cleaned if the split responsibility is clearly allocated and coordinated. So a well-run dark kitchen site has this sorted: clear responsibility for each part of the extraction, coordinated cleaning of the shared system (often centrally arranged), and the records - so the whole extraction (the operators' parts and the shared ductwork) is cleaned to standard, at the right interval, with no gap. A good extraction cleaner working with a dark kitchen site will help by cleaning the whole (shared) system as a coordinated job and providing the records - but the responsibility for arranging it must be clearly owned. So the key to dark kitchen extraction is no part left unowned - the whole shared system cleaned, by clearly-allocated, coordinated responsibility (as covered in dark kitchen deep cleans and shared responsibility). So no part left unowned means the whole shared system cleaned. This is general commentary on dark kitchen extraction, not legal advice; check your leases and arrangements.
Questions
Because the extraction is often shared or connected across several operators, so it does not neatly belong to one - splitting or blurring the responsibility for cleaning it. In an ordinary kitchen, one operator has their own self-contained extraction and clearly owns its cleaning. In a dark kitchen, several separate food businesses operate from individual units, and the extraction serving them may be shared or common (a shared canopy over several units, or separate canopies feeding shared/connected ductwork and a common extract system). So the shared parts serve several operators - and whose job is it to clean them? Each operator (for their own unit), the site operator/landlord (who owns the common systems), or a shared arrangement? It depends on the site's setup and agreements, and it needs to be clearly established because it is not automatic. The danger is that it is blurred or unallocated - each party assuming another handles the shared extraction - so the responsibility ends up owned by no one. So the responsibility is unclear because the shared extraction does not neatly belong to one operator. This is general commentary, not legal advice.
The fire-risk-critical cleaning of the shared extraction can fall through the gaps - each party assuming another does it, so the shared parts get cleaned by no one. When responsibility for the shared extraction (shared canopy, common ductwork, extract system) is unclear or unallocated, each operator assumes the site operator or the others handle it, the site operator assumes the operators do, and so the shared parts - especially the common ductwork, which no single operator sees as theirs - get cleaned by no one. This is a serious exposure: the shared extraction still builds up grease (from all the operators' cooking) and carries a fire risk, so an uncleaned shared system accumulates a growing grease build-up and fire risk that no one is controlling - in a site with multiple cooking lines, where a fire in the shared extraction would threaten the whole site. So the risk of unclear responsibility is a real, uncontrolled, growing fire risk in the shared system, arising simply because no one owned its cleaning. This gap is a common problem in dark kitchens. So the risk is the cleaning falling through the gaps, leaving an uncontrolled shared fire risk. This is general commentary.
It depends on the site's setup and agreements, but it must be clearly allocated - typically each operator for their own parts, and an identified party (often the site operator/landlord, or a collective arrangement) for the shared/common parts. Each operator is responsible for their own cooking and unit (and any extraction solely theirs); the shared parts (a shared canopy, the common ductwork and extract system) serve several, so responsibility for them needs clearly allocating - commonly to the site operator or landlord (who owns the building and common systems, and may arrange the shared-extraction cleaning, recovering the cost), or via a collective arrangement among the operators. Which applies depends on the leases/licences and any cleaning arrangement for the specific site. The key point is not which particular model, but that it is clearly established and in writing - so every part of the extraction has an identified owner for its cleaning, with the shared parts arranged and coordinated (often centrally). So who cleans the shared extraction should be clearly allocated per the site's agreements - typically operators for their own parts, an identified party for the shared parts. This is general commentary, not legal advice; check your leases.
By clarifying the responsibility in writing, coordinating the shared-system cleaning, and sorting who arranges, pays and records it - so the whole extraction gets cleaned by identified parties. Clarify who cleans what: establish clearly and in writing (in the leases/agreements and a cleaning arrangement) who is responsible for cleaning which parts - each operator for their own canopy/unit, and a clearly-identified party (site operator/landlord, or a collective) for the shared/common ductwork and extract system - so no part is unallocated. Coordinate the cleaning: because the system is shared/connected, coordinate it so the whole system is cleaned compatibly (the shared ductwork cleaned as one job, coordinated with the operators' parts), often best arranged centrally. Arrange, pay and record: establish who arranges and pays for the shared cleaning, and who holds the records. So closing the gaps means clear written responsibility, coordinated cleaning of the shared system, and sorted arranging/paying/recording - so the whole extraction gets cleaned, by identified parties, with nothing left because the duty was unclear. So clarify, coordinate, and sort arranging/paying/recording to avoid gaps. This is general commentary, not legal advice.
Yes - the shared extraction builds up grease from all the operators' cooking and carries a fire risk, so it needs cleaning to standard at the right interval, like any extraction. Being shared does not change the fundamentals: the shared canopy and common ductwork accumulate grease (from all the cooking flowing through them - potentially a lot, given multiple operators), and that grease is a fire risk - so the shared system needs proper, whole-system cleaning to the TR19 Grease standard, at an interval matched to the (combined) cooking volume, with records. If anything, a busy dark kitchen's shared extraction, handling several operators' cooking, may build up grease quickly and need frequent cleaning. So the shared extraction needs the same proper cleaning as any extraction - the only difference is that the responsibility for arranging it is split/shared and must be clearly allocated (so it actually gets done). So yes - the shared extraction needs cleaning like any other, to standard and at the right interval; the dark-kitchen challenge is ensuring the split responsibility does not leave it undone. So yes, it needs proper cleaning, with clear responsibility for arranging it. This is general commentary.
By cleaning the whole shared system as a coordinated job and providing the records - so the whole extraction (operators' parts and shared ductwork) is cleaned to standard, once the responsibility is clear. A good extraction cleaner working with a dark kitchen site can clean the whole (shared) system as a coordinated job - the shared canopy, the common ductwork and extract system, and (in coordination) the operators' parts - to the TR19 Grease standard, so the whole system is properly cleaned rather than piecemeal or with gaps. They provide the records (reports, before-and-after photographs, certificates) for the shared system, so the cleaning is evidenced. And they can advise on the right interval for the (combined) cooking volume. This helps close the gap - but it works only if the responsibility for arranging and paying for the shared-extraction cleaning is clearly owned (by the site operator, or a collective), so the cleaner is engaged to do the whole shared system. So an extraction cleaner helps by cleaning the whole shared system as a coordinated, documented job - once the site has clearly allocated who arranges it. So a cleaner can do the whole shared system, given clear responsibility. This is general commentary.
In a dark kitchen, the shared extraction only gets fully cleaned if the split responsibility is clear and coordinated. We can clean the whole shared system as a coordinated job, with the records - so no part of the extraction is left uncleaned because the duty was unclear. Ask us about cleaning a dark kitchen's shared extraction.
