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Kitchen extraction cleaning - filters
Not all canopy filters are the same - baffle, mesh and cartridge filters catch grease in different ways, so they clog differently, hold grease differently, and need cleaning at different frequencies and in different ways. Knowing which you have shapes how the extraction should be cleaned. Here is why your filter type changes the clean. This is general commentary.
The short answer
The grease filters in a kitchen canopy are the first line of defence against grease reaching the ductwork - but they are not all the same. The three main types (baffle, mesh, and cartridge) catch grease by different mechanisms, and that difference changes how they behave and how they must be cleaned. Baffle filters: angled metal baffles force the air to change direction sharply, so the heavier grease droplets drop out of the airflow and drain away (rather than staying in the filter). So baffle filters shed and drain grease, are robust and easy to clean (in a dishwasher or by soaking), and are cleaned at a regular interval matched to the cooking; they hold less grease (better for fire safety). Mesh filters: layers of metal mesh trap grease within the mesh as air passes through. So mesh filters hold the grease within them, clog faster (the mesh fills), need cleaning more frequently, are harder to clean thoroughly (grease held through the layers), and are a greater fire risk (held grease near the flames). Cartridge filters: some systems use cartridge-type grease filters, or cartridge filters as a further filtration stage (in pollution-control units) - these trap grease in a cartridge that is cleaned or replaced, and need their own maintenance regime. Why this changes the clean: because the types clog, hold grease and clean differently, the filter type determines how often the filters need cleaning (mesh more often than baffle), how they are cleaned (washing baffles vs the harder-to-clean mesh vs cleaning/replacing cartridges), and how much grease is getting through to the ductwork (poor or clogged filters let more through, needing more ductwork attention). So the filters you have shape the extraction cleaning regime - the frequency, the method, and the load on the rest of the system. Knowing your filter type is therefore part of cleaning the extraction properly. So baffle, mesh or cartridge changes how - and how often - the filters and the system are cleaned. This is general commentary on grease filters and extraction cleaning.
Key points
Three filter types
The starting point is that canopy grease filters come in different types - baffle, mesh and cartridge - which catch grease by different mechanisms, and that difference is the root of why the cleaning differs. Baffle filters catch grease by inertia: angled metal baffles force the extracted air to change direction sharply, and the heavier grease droplets, unable to follow the turns, drop out of the airflow and drain away (down the baffles into a collection channel). So baffle filters make grease drop out and drain, rather than holding it. Mesh filters catch grease by trapping: layers of metal mesh through which the air passes, with the grease sticking to and accumulating within the mesh. So mesh filters hold the grease within them.
Cartridge filters catch grease within a cartridge unit - used in some canopies as the grease filter, or (more commonly) as a further filtration stage in systems with additional treatment (such as pollution-control or odour-control units, which may have cartridge or other secondary filters). Cartridge filters trap grease (and sometimes finer particles) in a cartridge that is then cleaned or replaced. So the three types catch grease differently: baffle (drop out and drain), mesh (trap and hold in mesh), cartridge (trap in a cleanable/replaceable cartridge). This difference in how they catch grease drives everything else - how they clog, how much grease they hold, their fire risk, and crucially how and how often they must be cleaned. So there are three filter types, catching grease in different ways - the basis for why the clean differs. So different ways of catching grease is the starting point. This is general commentary.
How they clog and hold grease
Because they catch grease differently, the types clog and hold grease differently - which directly affects how often they need cleaning and how much of a fire risk they are. Baffle filters shed and drain grease, so they hold relatively little and do not clog readily - the grease drops out and drains away rather than accumulating in the filter. So baffle filters stay working longer between cleans and hold less grease (a lower fire risk), needing cleaning at a regular but manageable interval. Mesh filters hold the grease within the mesh, so they clog faster (the mesh fills with grease), restrict airflow as they clog, and hold more grease near the flames (a greater fire risk). So mesh filters need cleaning more frequently, and left uncleaned become both ineffective and hazardous faster than baffle filters.
Cartridge filters load up with grease (and sometimes fine particulate) over time, and their capacity depends on the cartridge - once loaded, they need cleaning or replacing to keep working; a loaded cartridge restricts airflow and stops catching effectively. So cartridge filters have their own loading and maintenance cycle (clean or replace at intervals). The upshot: the filter type determines how quickly the filters clog and how much grease they hold - baffle (slow to clog, holds little), mesh (fast to clog, holds more, higher fire risk), cartridge (loads to capacity, then clean/replace). This means the cleaning frequency and urgency differ by type - mesh needing more frequent attention than baffle, cartridges needing their loading watched. So how they clog and hold grease - baffle sheds, mesh holds, cartridge loads - shapes the cleaning need. So baffle sheds, mesh holds, cartridge loads. This is general commentary.
How they are cleaned
The types are also cleaned in different ways, so the filter type changes the cleaning method as well as the frequency. Baffle filters are cleaned by washing - being solid metal baffles, they can be cleaned effectively in a commercial dishwasher or by soaking in a hot degreasing solution and washing, with the grease coming off the smooth baffles relatively easily, and they stand up to repeated cleaning. So baffle filters are straightforward to clean thoroughly and reuse. Mesh filters are also cleaned by washing (soaking and cleaning), but the grease held throughout the layers of mesh can be harder to remove thoroughly, and the mesh is less durable under repeated cleaning - so mesh filters need more frequent, careful cleaning and may need replacing sooner.
Cartridge filters are cleaned or replaced depending on the type - some cartridge filters are washable/cleanable (cleaned and reused), while others (particularly finer secondary-stage cartridges) are designed to be replaced when loaded, not cleaned. So cartridge filters need the right approach for their type (clean or replace), and their maintenance has to be built into the regime. So the cleaning method depends on the type: wash baffles (easy, thorough, reusable); wash mesh (more often, harder to clean fully, less durable); clean or replace cartridges (per their type). Using the right method for the filter type matters - and knowing the type ensures the filters are actually cleaned or replaced properly, not neglected or wrongly handled. So how they are cleaned - washing, replacing, the right method - differs by type. So the cleaning method differs by filter type. This is general commentary.
What it means for the system clean
Beyond the filters themselves, the filter type affects the whole extraction cleaning regime - because the filters' effectiveness determines how much grease reaches the ductwork, and thus the load on the rest of the system. Good, clean filters (baffle, kept clean) catch grease effectively, so less passes on to the ductwork - meaning the ductwork build-up is slower. Poor or clogged filters (mesh that has clogged, filters not cleaned often enough for their type) let more grease through, so the ductwork loads up faster - needing more frequent ductwork cleaning. So the filter type and its upkeep affect how quickly the rest of the system needs cleaning.
This means the extraction cleaning regime should be shaped around the filters you have: the filter cleaning frequency matched to the type (more often for mesh than baffle; watching cartridge loading), the cleaning method appropriate to the type, and the whole-system cleaning frequency accounting for how much grease the filters are letting through. A competent extraction cleaner assesses the filter type as part of setting up the cleaning - because it changes the frequency, method and the load on the ductwork. So the filters are not an afterthought but a factor that shapes the whole clean. Knowing your filter type (baffle, mesh or cartridge) is therefore part of getting the extraction cleaning right - it changes how often and how the filters are cleaned, and how the rest of the system is loaded and cleaned. So the filters shape the whole regime. So filter type shapes the whole system clean. This is general commentary.
Know your filters
So baffle, mesh and cartridge filters catch grease differently - baffle sheds and drains it, mesh traps and holds it, cartridge loads it into a cleanable or replaceable unit - and that difference changes how they clog, how much grease they hold, how often and how they need cleaning, and how much grease reaches the ductwork. So the extraction clean follows the filter type: mesh needs more frequent cleaning than baffle; cartridges need cleaning or replacing per their type; and the whole-system frequency accounts for how much the filters let through. Know your filter type, and the clean follows.
This connects to what a proper extraction clean involves - the filters being one part of a whole-system approach. A competent extraction clean addresses the whole system: the filters (cleaned or replaced appropriately for their type), the canopy, and the ductwork throughout (where the grease that gets past the filters builds up, and where the main fire risk is). The filter type shapes the filter part (frequency and method) and influences the rest (how much grease reaches the ductwork). So getting the extraction cleaning right means knowing and handling the filters correctly for their type, and cleaning the whole system to match. Whether you have baffle, mesh or cartridge filters, they need the right cleaning at the right frequency, and the ductwork needs cleaning for what gets through - all part of a proper, whole-system clean. So knowing your filters shapes the clean, within a whole-system approach. So the clean follows the filter type. This is general commentary on grease filters and extraction cleaning.
Questions
The three main types are baffle, mesh and cartridge, which catch grease by different mechanisms. Baffle filters use angled metal baffles that force the air to change direction sharply, so the heavier grease droplets drop out of the airflow and drain away (rather than staying in the filter). Mesh filters use layers of metal mesh through which the air passes, trapping the grease within the mesh as it goes. Cartridge filters trap grease in a cartridge unit - used in some canopies as the grease filter, or (more commonly) as a further filtration stage in systems with additional treatment (pollution-control or odour-control units) - which is then cleaned or replaced. So the three catch grease differently: baffle (drop out and drain), mesh (trap and hold in mesh), cartridge (trap in a cleanable/replaceable cartridge). This difference in how they catch grease drives how they clog, how much grease they hold, their fire risk, and how and how often they need cleaning - which is why the filter type matters for the extraction clean. So the main types are baffle, mesh and cartridge. This is general commentary.
Because the types clog, hold grease and clean differently, so the filter type determines how often the filters need cleaning, how they are cleaned, and how much grease reaches the ductwork. Baffle filters shed and drain grease (holding little, clogging slowly), so they need cleaning at a regular but manageable interval and are easy to wash thoroughly. Mesh filters hold grease within the mesh (clogging faster, holding more, a greater fire risk), so they need cleaning more frequently and are harder to clean fully. Cartridge filters load to capacity, then need cleaning or replacing per their type. So the frequency and method of filter cleaning differ by type. And the filters' effectiveness affects the rest of the system: good clean filters let less grease through to the ductwork (slower ductwork build-up), while poor or clogged filters let more through (faster build-up, needing more ductwork cleaning). So the filter type shapes the whole regime - the filter cleaning frequency and method, and the load on the ductwork. So the filter type changes how, how often, and how much the system is cleaned. This is general commentary.
Yes - mesh filters generally need cleaning more often than baffle filters, because they clog faster and hold more grease. Mesh filters trap grease within the mesh, so the mesh fills with grease over time and clogs - restricting airflow (reducing extraction) and holding grease near the flames (a fire risk). So they need cleaning more frequently to keep them working and to keep the held grease (and fire risk) down. Baffle filters, by contrast, shed and drain grease (rather than holding it), so they clog more slowly, hold less grease, and stay working longer between cleans - needing cleaning at a regular but less frequent interval than mesh. So if you have mesh filters, expect to clean them more often than you would baffle filters; leaving them means faster clogging, reduced extraction, and a greater fire risk. The exact frequency for either depends on the cooking (heavy, greasy cooking loads filters faster - as covered in filter frequency by cooking style), but for a given amount of cooking, mesh needs cleaning more often than baffle. So yes - mesh filters need cleaning more often than baffle. This is general commentary.
Cartridge filters trap grease in a cartridge unit, used as a grease filter in some systems or as a further filtration stage - and depending on the type, they are cleaned or replaced. Some canopies use cartridge-type grease filters; more commonly, cartridge filters appear as a further filtration stage in systems with additional treatment (pollution-control or odour-control units, which reduce grease, smoke or odour before the air is discharged). Cartridge filters trap grease (and sometimes finer particles) in the cartridge, which loads up over time and then needs attention. How they are cleaned depends on the type: some cartridge filters are washable/cleanable (cleaned and reused, like baffle filters), while others - particularly finer secondary-stage cartridges - are designed to be replaced when loaded, not cleaned. So cartridge filters need the right approach for their specific type (clean or replace) at the right interval, built into the maintenance regime. Because these secondary/cartridge filters are often out of sight and easily forgotten, they need including in the cleaning plan. So cartridge filters trap grease in a cartridge, cleaned or replaced per their type. This is general commentary; see cartridge and HEPA stages.
By determining how much grease gets past the filters to the ductwork - good clean filters let less through (slower ductwork build-up), while poor or clogged filters let more through (faster build-up). The filters are the first line of defence, catching grease before it reaches the ductwork (where the main fire risk builds up). How effective they are depends on the type and their upkeep: good filters kept clean (baffle, cleaned at the right interval) catch grease effectively, so less passes on and the ductwork loads up more slowly; poor filters, or filters not cleaned often enough for their type (clogged mesh, loaded cartridges), catch less, so more grease reaches the ductwork and it loads up faster. So the filter type and its cleaning affect how quickly the ductwork needs cleaning - a system with good, well-maintained filters needs its ductwork cleaned less often than one with poor or neglected filters (all else equal). This is why the filters are part of the whole-system picture: they shape the load on the ductwork. So the filter type affects the ductwork by determining how much grease gets through to it. This is general commentary.
Yes - a competent extraction cleaner should assess your filter type, because it shapes the filter cleaning frequency and method and the load on the rest of the system. The filter type (baffle, mesh or cartridge) determines how often the filters need cleaning (mesh more often than baffle; cartridge loading watched), how they should be cleaned (washing baffles, more careful washing of mesh, cleaning or replacing cartridges per type), and how much grease is reaching the ductwork (affecting the whole-system cleaning frequency). So a competent cleaner assesses the filters as part of setting up and carrying out the clean - handling them correctly for their type, and accounting for their effect on the ductwork. Knowing the filter type ensures the filters are actually cleaned or replaced properly (not neglected or wrongly handled), and that any secondary/cartridge stages are not forgotten. So yes - your extraction cleaner should know and handle your filter type, because the clean follows the filters you have. This is part of a proper, whole-system extraction clean. So the cleaner should assess your filter type. This is general commentary.
Baffle, mesh and cartridge filters clog, hold grease and clean differently - so they need the right frequency and method. Our extraction cleaning handles your filters correctly for their type and cleans the whole system to match. Ask us about cleaning your filters and extraction system properly.
