Extraction in high-rise commercial buildings

Because the duct runs a long route up through an occupied building, so a grease fire has more building - and more people above - to spread through and endanger. In a high-rise, the extraction ductwork carries the grease-laden air a long way, up through the multi-storey structure (through service risers and voids, past other floors) to discharge at roof level. So a grease fire in the duct has the whole long vertical route to travel through, potentially spreading fire up through the building floor to floor - and the floors above are occupied (guests, workers, residents) who are endangered and may be unaware. So a grease-laden high-rise duct is not a localised risk but a fire path through the whole occupied structure. This raises the stakes far above a single-storey kitchen with a short duct to the outside. So keeping the whole duct clean (to TR19 Grease) matters especially in a high-rise - the consequences of a fire are much greater. So extraction cleaning is more important in a high-rise because a duct fire threatens the whole building. This is general commentary.

Typically up through the building's service risers and voids, past other floors, to discharge at roof level above the building. In a high-rise, the grease-laden air from the kitchen must be carried a long way up and out - so the duct runs from the kitchen up through the vertical service shafts (risers) or voids that carry building services between floors, past or through other floors, to the roof, where it discharges well clear of windows, occupants and air intakes. So the duct is a long, enclosed, largely vertical grease-carrying route running up through the occupied structure. This is very different from a single-storey kitchen's short run to an outside wall - and it is the length and the route through the building that raise the fire stakes and complicate the cleaning. So in a high-rise, the extraction duct runs up through the risers and voids to the roof - a long route through the building. So the duct runs up through the building to the roof. This is general commentary.

Yes - but it needs adequate access panels along the whole route, so the cleaner can reach the internal surfaces throughout, including the vertical runs deep in the building. To clean the whole long duct to TR19 Grease, the cleaner must reach inside it along its entire length - up through the building, through the risers, to the roof. This requires access panels at suitable intervals and key points (bends, fire dampers) all the way up, not just near the kitchen. With adequate access, the whole route can be cleaned. Without it, long stretches (especially the hidden vertical runs) cannot be reached - so grease builds up unreachable and uncleaned, exactly where a fire would spread up the building. So the whole duct can and should be cleaned - which is why ensuring adequate access panels throughout is so important in a high-rise (retrofitting them if the duct is under-panelled). So yes - the whole duct can be cleaned, given access panels throughout. This is general commentary.

It can - a grease fire in a duct running up through the structure can spread fire along the duct and into the building's vertical fire-spread paths, up through the floors. A grease fire in the ductwork burns along the greasy internal surfaces, and in a high-rise the duct is a long vertical route running up through the building (through risers and voids). So a fire in the duct has that whole route to travel along, spreading upward - and because the duct passes through the building's vertical shafts, a fire in it is within the paths that fire can use to spread between floors. So a duct grease fire in a high-rise is not necessarily contained to the kitchen - it can spread up through the structure, endangering floors above. This is precisely why fire dampers, fire-rated duct construction and, above all, keeping the duct clean (removing the grease fuel) matter so much in a high-rise. So yes - a grease fire can spread through the building via the duct, which is why the clean duct matters. This is general commentary; a fire risk assessment addresses the specifics.

Usually the kitchen operator, often coordinating with the building's management - because the duct runs through the shared building, access and planning involve both. The kitchen operator is responsible for their extraction being clean (the fire risk from their cooking), so they arrange the cleaning. But in a high-rise, the duct runs up through the shared building (the risers, past other floors), so cleaning it involves access to those shared parts - which means coordinating with the building's management or landlord (for access to the risers, working in the occupied building, any shared arrangements). In some buildings, particularly with shared or landlord-provided extraction, the responsibilities may be split or set out in the lease. So high-rise extraction cleaning is usually arranged by the operator but coordinated with the building - and it is worth being clear on the access arrangements and any split duties. A competent extraction cleaner experienced in high-rise work can help plan this. So the operator arranges it, coordinating with the building's management. This is general commentary; check your lease and arrangements.

The same TR19 Grease standard as any commercial kitchen extraction - but the long route makes reaching and cleaning the whole system, and the access provision, especially important. TR19 Grease is the recognised standard for cleaning kitchen extraction ductwork (covering the required cleanliness, the whole-system approach, and the access needed to reach and verify it) - and it applies to a high-rise kitchen's extraction as to any other. What is different in a high-rise is the scale and stakes: the duct is a long vertical route through the building, so meeting the standard means cleaning that whole route (which needs adequate access panels throughout) and managing the higher fire risk it represents. So the standard is the same, but a high-rise demands particular diligence in reaching and cleaning the whole long route and in the access provision - because the consequences of an uncleaned, grease-laden stretch are greater. So TR19 Grease applies, with the whole-route cleaning and access being especially critical in a high-rise. So the same TR19 Grease standard applies, with extra emphasis on the whole route. This is general commentary.