Home / Kitchen Extraction Cleaning / Guide
Extraction cleaning - what it means
Grease dripping from a canopy is a visible symptom, but what it really points to is a bigger, mostly hidden problem: the state of the whole extraction system. The drips you can see are the tip of a system-wide build-up, including the ductwork you cannot see. Understanding what dripping grease really means is understanding the full picture behind the visible sign.
The short answer
Grease dripping from a canopy really means that the whole extraction system is heavily grease-laden, not just that a bit of grease has appeared on the canopy. Grease builds up throughout the system - the canopy, the filters, and the ductwork - as the grease-laden air passes through, so a build-up heavy enough to drip at the canopy indicates heavy accumulation throughout, including in the ductwork you cannot see, where much of the fire risk actually lies. So the visible drips are a symptom pointing to a system-wide problem: the extraction is well overdue cleaning, and the grease has accumulated throughout it. Reading the drips as the whole problem, rather than the visible tip of it, misses what they really mean about the state of the entire system.
A symptom, not the whole problem
Grease dripping from a canopy is a symptom, and like any symptom it points to something bigger than itself. The drips you can see are not the whole problem - they are the visible sign of a much larger, mostly hidden one: the state of the entire extraction system. It is a mistake to look at dripping grease and see only the drips, as though the problem were the small amount of grease that has appeared on the canopy. What the dripping really means is that the whole system is heavily grease-laden, with the visible drips being just the part of that accumulation that has become visible. The symptom is on the canopy; the problem is throughout the system.
Reading the sign correctly matters, because responding to the visible drips alone would address only the symptom and leave the real problem untouched. If you understand that dripping grease means a system-wide build-up, you understand that the response has to address the whole system, not just the visible grease. So the value of asking what dripping grease really means is that it directs attention to the full extent of the problem - the heavy accumulation throughout the system, including the parts you cannot see - rather than the small visible portion. The drips are a window onto the state of the whole system, and reading them that way is what leads to properly addressing the actual problem.
Grease builds up throughout
To understand what dripping grease means, it helps to understand how grease builds up in an extraction system. The grease-laden air from cooking passes through the whole system - it is drawn into the canopy, through the filters, and along the ductwork to discharge - and as it passes through, it deposits grease all the way along. So grease accumulates throughout the system: on the canopy, in and around the filters, and along the length of the ductwork. The build-up is not confined to where you happen to see it; it is system-wide, wherever the grease-laden air travels.
This means that when grease is heavy enough to drip at the canopy, it has been accumulating throughout the system, not just at the canopy. The canopy is simply where you can see it - it is visible and accessible - but the same grease-laden air that has built up there has also been depositing grease in the filters and, crucially, in the ductwork. So heavy build-up at the visible canopy indicates heavy build-up throughout the system, because the grease accumulates everywhere the air goes, and a load heavy enough to drip at one point reflects a heavy load overall. The dripping at the canopy is the visible manifestation of a system-wide accumulation - which is exactly why it points to more than itself.
The hidden ductwork is the concern
The most important thing dripping grease really means is that there is heavy grease build-up in the ductwork you cannot see - and that is where much of the real fire risk lies. The ductwork carries the grease-laden air from the canopy through the building, accumulating grease along its length, and this ductwork is largely hidden from view - running through ceilings, walls and voids where you never see it. So while the dripping is visible at the canopy, the heavy build-up it indicates extends into the hidden ductwork, where a heavy grease load is a serious fire risk precisely because a fire in a grease-lined duct can spread through the building via the ductwork.
This is why reading dripping grease as just a canopy issue is so misleading: the visible canopy grease is the accessible tip, but the hidden ductwork grease is the greater concern. A fire fed by grease in the ductwork can travel through the building, so the grease build-up in the ducts - which the dripping at the canopy signals - is the part of the problem that carries the most serious fire risk. So what dripping grease really means, at its most important, is that the hidden ductwork is heavily grease-laden and presents a real fire risk that you cannot see. The visible drips are a warning about the invisible ducts, which is exactly the part that matters most and the part that a response focused only on the visible grease would leave dangerously unaddressed.
Responding to the real meaning
Understanding what dripping grease really means points directly to the right response: cleaning the whole system, not just the visible grease. Because the dripping indicates system-wide build-up including the hidden ductwork, addressing it properly means having the entire system cleaned - the canopy, the filters, and crucially the ductwork - to remove the grease throughout. Wiping the visible drips, or cleaning only the accessible parts, leaves the hidden ductwork grease in place, which is the greatest fire risk and the part the dripping was really warning about. So the response has to match the real meaning of the sign: a whole-system clean for a whole-system problem.
This is the practical value of reading the drips correctly. Seen as just canopy mess, dripping grease might prompt only a superficial response that leaves the real problem - the hidden ductwork build-up - untouched. Understood as a symptom of system-wide accumulation, it prompts the proper response of cleaning the entire system, which addresses the actual fire risk. So what dripping grease really means is not just that the canopy needs wiping but that the whole extraction system, hidden ducts included, is heavily grease-laden and needs a thorough clean. Reading the visible sign as the window onto the whole system that it is, and responding by cleaning the whole system, is how you address the real problem the dripping grease is pointing to - which is far more than the drips themselves.
The takeaway
Grease dripping from a canopy really means that the whole extraction system is heavily grease-laden - not just that grease has appeared on the canopy. Grease builds up throughout the system as the grease-laden air passes through it, depositing on the canopy, in the filters, and along the ductwork. So a build-up heavy enough to drip at the visible canopy indicates heavy accumulation throughout, including in the ductwork you cannot see - where much of the real fire risk lies, because a fire in a grease-lined duct can spread through the building.
So the visible drips are a symptom pointing to a system-wide problem, with the hidden ductwork the greatest concern - the part the dripping is really warning about, and the part a response focused only on the visible grease would leave dangerously untouched. Understanding this points to the right response: cleaning the whole system - canopy, filters and ductwork - not just wiping the drips. Read the dripping grease as the window onto the state of the entire system that it is, and respond by cleaning the whole system, and you address the real problem it is pointing to, which is far more than the drips themselves.
Questions
That the whole extraction system is heavily grease-laden, not just that grease has appeared on the canopy. Grease builds up throughout the system - canopy, filters and ductwork - so a build-up heavy enough to drip at the canopy indicates heavy accumulation throughout, including in the hidden ductwork where much of the fire risk lies.
Because grease accumulates everywhere the grease-laden air travels - the canopy, the filters, and along the ductwork - not just where you see it. The canopy is simply where the grease is visible; the same build-up extends through the filters and into the ductwork. So the visible drips are the tip of a system-wide accumulation.
Because it carries the grease-laden air through the building, accumulating grease along its hidden length - and a heavy grease load in the ductwork is a serious fire risk, since a fire in a grease-lined duct can spread through the building. So the ductwork build-up the dripping signals is the part of the problem with the most serious fire risk.
No - wiping the visible drips leaves the system-wide build-up in place, including the hidden ductwork grease that is the greatest fire risk and the part the dripping was really warning about. Addressing the real problem means cleaning the whole system, not just the visible grease at the canopy.
As a symptom - a window onto the state of the whole system, not the whole problem itself. The drips point to heavy accumulation throughout the extraction system, including the parts you cannot see. Reading them that way directs attention to the full extent of the problem rather than the small visible portion.
Cleaning the whole system - canopy, filters and ductwork - to remove the grease throughout, matching the system-wide meaning of the sign. A response focused only on the visible grease leaves the hidden ductwork build-up untouched, which is the greatest fire risk. A whole-system problem needs a whole-system clean.
The grease you can see dripping is the tip of a system-wide build-up - we clean the whole system, including the hidden ductwork where the real fire risk lies, not just the visible grease.
