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Duct cleaning - school kitchens
A school kitchen cooks in short, intense bursts - hundreds of meals pushed out in a 45-minute lunch, day after day through term - and all that grease-laden air travels up into extract ductwork nobody sees above the servery and the roof. Left there it is a fire risk in a building full of children, and a hygiene one the environmental health officer will ask about. School kitchens also do something most kitchens cannot: they close for the holidays. That is the natural window to clean the concealed run properly. Here is why school kitchen ductwork needs cleaning, and how a contractor who understands the school year fits around it. This is general commentary.
The short answer
School catering is a world of its own, and the ductwork above a school kitchen reflects it. What makes a school kitchen different. A school kitchen does not cook steadily through the day like a restaurant - it cooks in a short, intense burst, plating hundreds of hot meals in a lunch window that may be as little as 45 minutes, then quietens until the next day. That concentrated service pushes a lot of grease-laden air up into the extract in a short time, so the canopy, filters and the concealed ductwork above them load with grease faster than the modest opening hours suggest. And the run is genuinely concealed - it climbs out of the kitchen, through the ceiling void and along to a roof fan, where a nightly wipe of the visible canopy never touches it. Why it matters more in a school. Concealed grease in the duct is a fire risk anywhere, but a school raises the stakes: the building is occupied by hundreds of children and staff, and a kitchen fire that spreads through a greased duct puts a difficult evacuation and a serious duty of care in play. Under the Regulatory Reform (Fire Safety) Order 2005 the responsible person - the school or the trust - has to assess and manage that risk, and a current record of the extract system being cleaned to a standard is exactly the evidence a fire risk assessor looks for. The environmental health officer, scoring the kitchen's hygiene, will expect the ventilation to be managed too. The holiday window. The one thing a school kitchen can do that most cannot is close completely - at half term, and for the long summer break. That is the natural window to clean the concealed ductwork properly: with the kitchen empty, the whole run can be surveyed, compliant access hatches cut where a sealed section has none, and every internal metre cleaned back to bare metal and certified, with no service to work around and no meals lost. Planning the clean into the holiday, rather than squeezing it into a term-time evening, is how a school gets the thorough job. Working with a contractor who understands schools. Cleaning a school's ductwork is not just a technical job - it is one done on a school site, which brings its own requirements. A contractor who understands schools sends DBS-checked, inducted engineers who can work safely around a school setting; plans the work to the school calendar (the holiday for the deep work, a planned slot for anything in term); works cleanly and leaves the kitchen ready for the return; and hands over the certificate, the grease-depth readings and the before-and-after photographs the school needs for its fire file, its compliance records and its next inspection. So duct cleaning for a school kitchen is about the concealed grease the short, heavy service builds up, cleaned in the holiday window, by a contractor who fits the school year and leaves the evidence. This is general commentary on catering ventilation in schools.
Key points
Why a school kitchen loads its ductwork fast
The place to start is with how a school kitchen actually cooks, because it explains why the ductwork needs attention despite the modest opening hours. A school kitchen serves a large number of meals in a very short, concentrated window - hundreds of children fed in a lunch service that may run only 45 minutes to an hour, then a quiet afternoon. That is a lot of cooking compressed into a short time: fryers, ovens, grills and combi ovens all going hard at once to get the meals out. And hard, concentrated cooking throws a lot of grease-laden air up into the extract quickly.
So the extract canopy, its filters and the concealed ductwork above them load with grease faster than a look at the timetable would suggest - the intensity matters more than the hours. And the grease does not stop at the canopy: it is carried up into the ductwork that runs through the ceiling void and out to the roof fan, coating the inside of a run that the daily clean of the visible canopy never reaches. So a school kitchen builds a concealed grease problem in the ductwork through its short, heavy services - which is why it needs the same duct cleaning as a kitchen that cooks all day. So a short, intense lunch does the work of a long day. This is general commentary.
The fire stakes in an occupied school
The reason the concealed grease matters so much in a school is the building it sits in. A school is occupied by hundreds of children and staff through the day, and a kitchen fire is one of the most common ways a fire starts in a catering building - grease over a heat source, ignited and drawn up into a greased duct that carries the fire through the structure fast and unseen. In a building full of children, where evacuation has to be managed carefully, a fire that spreads through the ductwork is exactly the scenario the fire precautions are there to prevent.
That is why the law puts a clear duty on the school. Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person - the school, the local authority or the academy trust - must assess and manage the fire risk, and concealed grease in the kitchen extract is a recognised part of that risk. A fire risk assessor looking at the kitchen will expect to see the extract system cleaned to a standard, with a current certificate and photographs to show it - not a wiped canopy over an unknown duct. Managing the ductwork is a real part of a school's fire-safety duty, not an optional extra. So concealed grease in a building full of children is why it matters. This is general commentary.
The holiday window
Here is where a school kitchen has a genuine advantage most kitchens do not: it closes. At half term, and for the long summer holiday, the kitchen stops completely - and that is the natural, ideal window to clean the concealed ductwork properly. With the kitchen empty and no service to work around, the whole extract run can be surveyed end to end, compliant access hatches cut into any boxed or sealed sections that have none, and every internal metre cleaned back to bare metal, with grease-depth readings logged before and after and the result certified.
Doing the work in the holiday, rather than squeezing it into a single term-time evening, is how a school gets the thorough job - the time to open the run, clean it fully and put it back, without the clock of the next morning's service running. It also means the kitchen comes back from the break clean, certified and ready for the new term, with the paperwork already in the file. A contractor who understands schools plans the deep work into the holiday deliberately, and keeps any smaller term-time attention to planned, out-of-the-way slots. So clean the concealed run while the kitchen is closed - the holiday is the window. This is general commentary.
Safeguarding and working on a school site
Cleaning a school's ductwork is a job done on a school site, and that brings requirements a restaurant job does not. Safeguarding is the first: anyone working on a school site, even in the holidays, has to be someone the school is comfortable having there, and a contractor who works with schools sends DBS-checked and properly inducted engineers who understand a school setting and its safeguarding expectations. Turning up with the right checks and the right conduct is part of being a contractor a school can actually use.
The practical side matters too. School kitchens are often part of older or mixed buildings, with extract runs boxed into the fabric and roof plant that has to be reached safely; the work has to be planned around caretaking, access and any other holiday works going on. A contractor who understands schools coordinates with the site team, works cleanly and safely, and leaves the kitchen and the plant as they found them - ready for the caterers to return. So DBS-checked engineers who can work around a school is part of what the setting needs. This is general commentary.
What the school gets
The outcome a school needs from duct cleaning is twofold: a genuinely clean, fire-safe extract system, and the evidence to prove it. On the first, the whole concealed run - canopy, filters, plenum, the ductwork through the void and the roof fan - is cleaned back to bare metal, so the grease that was the fire fuel and the hygiene problem is gone, and the system pulls properly again. On the second, the school receives a dated certificate to the recognised standard, the grease-depth readings taken before and after, and before-and-after photographs of the internal run.
That evidence is what the school actually has to produce: for its fire risk assessment and fire file, for the environmental health officer scoring the kitchen, and for its own compliance records and governors. A school, a local authority or an academy trust managing catering across many sites needs that paperwork in order, per site, on a schedule it can rely on - which is exactly what a contractor who understands schools sets up: the holiday clean, the certificate, and a next-due date that lands the next clean in the next natural window. So a clean, certified system and the evidence for the file is what the school gets. This is general commentary.
Questions
Because the intensity matters more than the hours - a school kitchen plates hundreds of meals in a very short, concentrated lunch service, and that hard, compressed cooking pushes a lot of grease-laden air up into the extract quickly. The grease travels up into the concealed ductwork above the servery and out to the roof fan, where the daily clean of the visible canopy never reaches it, and it builds up over the term. So even though the opening hours are short, a school kitchen loads its ductwork with grease much as a kitchen that cooks all day does - and that concealed grease is a fire and hygiene matter that needs cleaning. So it needs cleaning because the short, heavy service loads the duct fast. This is general commentary.
The school holidays - at half term and especially the long summer break, when the kitchen is closed completely. With no service to work around, the whole concealed run can be surveyed, opened with compliant access where needed, cleaned back to bare metal and certified thoroughly, and the kitchen comes back ready for the new term with the paperwork in the file. Planning the deep work into the holiday, rather than squeezing it into a term-time evening, is how a school gets the thorough job without losing any meals. So the best time is the holiday, when the kitchen is closed. This is general commentary.
Yes - concealed grease in a kitchen extract is a recognised fire risk anywhere, and a school raises the stakes because the building is occupied by hundreds of children and staff. A kitchen fire drawn up into a greased duct can spread through the structure fast and unseen, which is exactly the scenario a school's fire precautions exist to prevent. Under the Regulatory Reform (Fire Safety) Order 2005 the responsible person must assess and manage that risk, and keeping the extract cleaned to a standard - with a certificate and photographs to show it - is part of meeting that duty. So yes, and it is part of the school's fire-safety obligation. This is general commentary.
Yes - working on a school site brings safeguarding requirements, and a contractor who works with schools sends DBS-checked and properly inducted engineers who understand a school setting. Even in the holidays, the people on site have to be someone the school is comfortable having there, working to the school's safeguarding expectations and coordinating with the site team. Turning up with the right checks and the right conduct is part of being a contractor a school can actually use. So yes - DBS-checked engineers who can work around a school. This is general commentary.
A dated certificate to the recognised standard, the grease-depth readings taken before and after, and before-and-after photographs of the internal run. That is the evidence a school actually has to produce - for its fire risk assessment and fire file, for the environmental health officer scoring the kitchen, and for its own compliance records and governors. A school, local authority or academy trust managing catering across several sites needs that paperwork in order per site, on a reliable schedule, with a next-due date that lands the next clean in the next natural window. So you get the certificate, readings and photographs for the file. This is general commentary.
Yes - an academy trust or a local authority running catering across many schools can have the ductwork cleaned and certified to one standard across the estate, on a schedule built around the school calendar. That means one survey approach, one set of certificates per site, and a next-due date per kitchen, so the trust keeps its compliance in order across all its schools in one place rather than site by site. Planning the work into the holidays across the estate keeps every kitchen cleaned without disrupting any of them. So yes - across the whole trust, to one standard, on one schedule. This is general commentary.
A school kitchen's short, heavy lunch loads its concealed extract ductwork with grease - a fire risk in a building full of children and a matter the environmental health officer checks. We clean and certify the whole run, planned into the holiday window and worked by DBS-checked engineers, with the certificate and photographs for your fire file. Ask us to clean your school's catering ductwork. This is general commentary on catering ventilation in schools.
