Exhaust charcoal filter. operation and installation features
As we have already mentioned, the recirculation device cleans the air by using a carbon filter for the hood for this purpose. The principle of operation of such devices is somewhat more complicated than that of devices ensuring removal of exhaust air from the room. In the latter case, the air is simply discharged outside the kitchen through the ventilation shaft.
Such devices have no need to clean the extracted air, but, nevertheless, the motor protection from grease particles is still present in the form of a grease filter. The same element is equipped with hoods with charcoal filter without exhaust air (recirculation).
It turns out that in such devices, in addition to the charcoal filter, there is also a grease filter. The need for such a variety of cleaning elements is explained quite simply: the grease filter is aimed at high-quality purification of air flows from impurities grease particles, which, with a long-term accumulation on the motor will lead over time to its failure. Charcoal filter for the kitchen hood additionally cleans the air from the remaining impurities of grease, odors and other pollutants.
The result is the combined work of several purifying elements, which allows you to return the air into the room as clean as possible. However, the disadvantage of this scheme is the lack of fresh air supply.
But the price range of such devices as a kitchen hood with charcoal filter is very acceptable for any category of consumers. In addition, when replacing the cleaning elements does not have to pay an impressive amount, since their cost is more than affordable.
The comparative cheapness of such cleaners is explained by their design. The core of the filter is made of activated or chemically treated charcoal, which allows it to remove impurities, the volume of which is five times greater than the amount of the coal itself. But this is not all the advantages of such equipment, as in addition to full-size devices, you can also opt for such a model as a recessed hood with a charcoal filter. In this case, overhanging cabinets over the stove will hide the hood device inside. As a result, the kitchen interior is not damaged and the air is purified regularly.
Why do we need them: principle of operation
Coarse filters are also called grease filters. They are a must for any air purifier. This device is designed to purify the air masses that are sent directly to the unit.
First of all the small suspended particles of grease are sifted out. If such a filter is missing, after a few months you would notice that the outer and inner surfaces of the device are covered with an oily liquid with bits of dust.
Manufacturers offer disposable and reusable grease filters. The most practical is the latter type.
Disposable models are made of sintepon, fleece or acrylic. They are installed in the most budgetary hood designs. They are called mats, and are thrown away after a couple of months of work after the surface is completely dirty.
Important! Such single-use grease filters must not be washed, otherwise they will lose their properties.
Reusable” refers to metal filtering that lasts as long as the hood itself. The use of reusable metal construction does not reduce the quality, reliability, durability and safety of the entire unit.
Such devices do not need to be replaced, you only need to remember about hygienic procedures in the form of washing and cleaning the surface. Such a filter is made of stainless steel, galvanized steel or thin aluminum.
Important! If aluminum was used in the manufacture, it is likely to have undergone an anodizing procedure additionally. It protects the device from the oxidation process.
Depending on the model, the metal filter system may have several layers and modules at once. The best durable one is a metal frame made of stainless steel.
Types of grease filters
In addition to the classification on the metal reusable and disposable, there are other types and subspecies of such devices.
Filters can be single or multilayer. Of course, the multilayer filtration system is more expensive. There is also a difference in shape. For example, rectangular, round and square.
The filtration systems also differ in terms of material. Are made of fleece, acrylic, stainless steel, galvanized steel, aluminum and so on.
Reviews of grease filters: pros and cons
They are invaluable for your kitchen. Buyers have long noted a number of advantages that are inherent in these devices.
Before buying it is advisable to get acquainted with the reviews, because each manufacturer uses its own technology to manufacture products from metal.
- The advantage of the grease trap filter is that it prevents oily liquids from getting into the hood body.
- The grid prevents dust from the hood from settling on the food.
- Reusable filters last a long time, do not fail.
- Panels are easy to remove for hygienic procedures.
- Partially muffle the sound of the appliance in operation.
- Some models of hoods are not equipped with a convenient way to remove the panels.
- If you own metal panels, every few months you need to remove them and clean them thoroughly. However, the procedure is much easier if you have a dishwasher.
- If you bought an inexpensive model, you might find that it has disposable filters. And they need to be replaced every few months.
- Some panels are made of such materials from which grease is difficult to clean. By washing it off as well, you can simply leave a mark on the panel.
Instructions for replacing the element
If you are faced with the need to replace the filter, you will probably need a step-by-step guide on how to do it quickly and easily.
Familiarize yourself with the instructions that tell you how to remove the accessories from the hood. If there is no manual or there is no separate section on this subject, then go to the next step.
- Approach the hood and take a close look at the mounting system. Some panels simply fit into the grooves. Others are attached by pressing a special button. Third panels are simply plugged in.
- Decided on the method of attachment, try to carefully take out the accessories. Move carefully so as not to damage the filter or hood.
- After taking the appliance out, place it in the sink. Now you can carry out hygienic procedures that aim to clean the grid.
Types of filters in hoods
There are three types of filters used in modern hoods:
Let’s take a closer look at each type of filtration system.
Grease filter for the hood
A grease filter is a mandatory component of any hood. It traps vapors, grease and all kinds of food spills and prevents them from depositing on the internal walls, the fan and the motor. Without this filter already in 2-3 months all inside of the hood would become greasy, sticky and very dirty, and the motor would most likely burn out in a short time.
The grease filter can be disposable or reusable. It is installed in a flat bottom panel, through which the air intake.
Non-disposable filters for the hood
Disposable hood filters are mostly found in inexpensive models. They are a layer of synthetic material: synthetic, fleece or acrylic. The life of these filters depends on how often you use your stove. On average, it is 1-2 months.
These filters cannot be cleaned. As they get dirty, they must be removed and replaced with new ones. In some models of hoods spare disposable “mats” are included. Otherwise you have to buy them separately, which means you have to pay for them on a regular basis.
But it also has the advantage that you don’t have to spend time and effort cleaning.
Reusable hood filters
The reusable hood filter is a fine mesh metal filter made of galvanized steel, aluminum or stainless steel. Such structures are durable and do not require replacement.
As they get dirty they need to be removed and washed. As a rule, they have special locks for easy removal and fastening.
The best quality are considered grids of stainless steel. They do not oxidize, do not deform. Depending on the specific hood model and size, the reusable grease filter can be a single filter (one piece) or made up of 2 or 3 individual cassettes.
Exhaust charcoal filters
Kitchen hood charcoal filters are built into all recirculation units. Their main task is to clean the air of impurities and odors. Visually, it is a plastic cassette consisting of several cartridges filled with activated carbon.
The air passing through all the charcoal compartments is completely cleaned and comes out fresh and disinfected. The charcoal filter must always be installed after the grease filter. If you do not protect it with a grease-absorbing mesh, it will quickly fall into disrepair, clogged with food sticky particles. The cartridges become soiled with use that they must be replaced. Depending on the manufacturer, they have a service life of 3 to 4 to 6 to 7 months. If users cook on the stove infrequently, the charcoal filter can last even a year.
Carbon cassettes are seldom used in conventional air extraction hoods. But if you wish you can buy such a filter separately and install it in the air exhaust pipe.
If a dirty carbon filter is not changed in time, the airflow will be more difficult to pass through it, which will increase the load on the engine.
Universal filters for a cooker hood
Universal hood filters are a more advanced type of filter that combines a carbon cartridge protected by a grease-absorbing material. Universal cleaning systems are relevant for recirculation hoods, when the most effective air purification is required.
The additional grease-absorbing material layer is also disposable and may require several replacements over the life of the carbon cartridges.
There are also universal filters in which the walls of the cartridges themselves consist of a special material that increases the filtration efficiency.
On average, it lasts between 6 and 12 months, after which it must be replaced.
Which is better: charcoal or grease hood filter
Both varieties provide a similar effect. Whatever type of hood is used, you must install a grease filter in your kitchen. This is due to the fact that in its absence the activated carbon filter element located in the housing will be contaminated faster. The size of the grease filter is larger than that of the charcoal filter. This feature helps to increase the coverage area, which improves the efficiency of the extraction system.
The grease filter is represented by different types:
Anodizing method is used to improve the quality of the filter element. However, such products are installed on expensive hoods. The aluminium filter is the preferred option. They are rugged, durable and not prone to corrosion.
The carbon analogue is inferior to these variants in terms of durability, reliability. These components are often replaced in the hood, the disadvantage is the need to control the life span of the filters. If we compare the different types of products, it is noted that the charcoal version can replace the grease trap as well. The design has two different functions: it removes grease from the air flow and cleans the air of smoke and odors. By comparison, a grease trap will not provide the desired result, t. к. The mesh size of the grid is big enough.
Note that the grease filter can also be disposable, but it has a shorter lifespan compared to its charcoal counterpart. For this reason, they use reusable designs more often. There is also a combination filter for the hood. It contains carbon fibers, but the outside of the product is protected by a synthetic material, while the outer layers retain grease. The contents of the package remove contaminants from the air stream. But the price of such products is high.
For a more detailed comparison of all charcoal hoods from the rating, we have made a table with the main different technical characteristics, as well as the average cost.
ModelPower consumption, WattMax. output, cu. m/hMax. Noise level, dB Average price,
|ELIKOR Davoline||160||290||52||2 790|
|Krona Jessica slim PB||140||350||36||3 890|
|GEFEST BO-2501||110||310||65||4 000|
|Jetair Orion LX 60 IX||206||560||62||9 290|
|Midea MH 90I 350 X||210||900||55||9 990|
|Kuppersberg ONDA 60||140||800||58||14 390|
|Zigmund Shtain K 296.61||165||650||59||13 890|
Technical specifications depend on the type of activated charcoal filter. Here are the features of the Folter filter as an example:
- Capacity: 2500 to 22500 cubic metres per hour.
- Aerodynamic resistance (initial): 120 Pa (plus or minus 10 Pa).
- Temperature for operation: not exceeding 60 degrees Celsius.
- Operating humidity: max. 70 %.
- Weight: 87 to 554 kg.
Filter replacement time depends on the capacity of the fixture. Normally 3 to 12 months (consult manual). Many manufacturers sell the filters in kits: two by two.
Before you buy a hood, it is advisable to ask the salesperson if there is a need to buy a charcoal filter for it or if it is already in the design.
The filter device is based on an absorbent that absorbs and traps pollutants. The absorbent can be in pellet or powder form. The filter housing is usually plastic.
A motor directs the air into the hood with a fan and drives it through the charcoal filter. Over time the filter becomes dense, thus reducing its absorption capacity.
Tip: In a room with a carbon filter hood, it is recommended to install an air ionizer. Passing through the charcoal, the air loses light ions, and ozone is no longer formed in it. Air without ozone can be called dead air.
Grease filters can be specifically designed for a particular manufacturer’s hood, or they can be universal, with the ability to adjust the size for any unit. Below is a ranking of the best universal disposable particulate filters.
How to Select the Right Carbon Filter
Made of white polyester. Product dimensions: width (cm). 114, length (cm). 47, thickness (cm). 2 (enlarged for more effective fat absorption), weight 500 g. Can be easily adjusted to the desired size by cutting off excess material. Requires regular replacement after 3-4 months, depending on the intensity of use of the hood.
- Versatility (you can cut it to the right size), it fits in any hood;
- Increased thickness allowing a better absorption of fat fumes and longer use (3-4 months).
Manufacturer’s standard size is 11447 cm. Manufactured from natural fibre fabric, easily recyclable (no special disposal required). By simply cutting it off, the filter can be adjusted to the required size.
For convenience and not to miss the time of replacement, the manufacturer has provided a visual indicator that indicates that it is time to install a new filter: when the logo changes color to bright red, you should immediately respond.
- Simplicity and versatility in size;
- Natural fibers are used, which do not emit any harmful substances around them;
- Long time of use;
- No need to resort to special disposal;
- There is an indicator, which will prompt the time out of operation of the product.
Country of Origin. Germany. The set includes 2 filters, measuring 47×55 centimeters, which means that they are perfect for any hood with a width of 50-60 centimeters. The presence of Topperr indicator (paper backing with logos) will prompt when it is necessary to change the filter: the grey color of the picture will change to red.
- In the composition of 100% biodegradable material that does not cause harm to health and the environment;
- The kit includes 2 filters;
- The ability to independently adjust the size;
- has a tell-tale indicator for timely replacement.
Manufactured in Germany. Complete set. 2 pcs. Dimensions: 57 cm 47 cm. Made of natural fire-safe material. Suitable for all hoods up to 50-60 cm in width. Provides a visual indicator to alert you when it needs to be replaced.
- The instructions do not specify a particular hood model, it is suitable for any hood with a width of 60 cm or less;
- Comes complete with 2 filters in a package;
- Made of material which does not catch fire in high temperatures;
- Has an indicator to alert you when it’s time to change to a new one.
Popular filter models
Carbon filtration systems are created by many manufacturers. Let’s list the most popular companies, whose products have won the appreciation of users in all countries.
Jet Air. Such coal cleaning device is created by the same name company from Italy, which is part of the Elicf Group. In operation since 1984. Its products are inexpensive and of good quality.
- Elikor. Located on the territory of Russia, the specification of which is considered the production of ventilation equipment for home and office.
- Elica is a filter that stands out from other products on the market for its affordable price and its design. Designed specifically for ELICF and JET AIR BETTA and JET AIR ALEA hoods.
- Krona. A round filter system that fits perfectly to the following cooker hoods: DIANA, KAMILLA, BELLA, MILA, JANNA. Highly versatile and reliable.
- Cata. Popular filter from the Chinese manufacturer. Well suited to Nodor testa, Cata and Apleson air.
Filters from the following manufacturers are also particularly popular: Electrolux, Falmec, Bosch, Fabrino, Whirlpool, Gaggenua.
Now on the market you can find a universal cleaner for kitchen hoods based on charcoal, which fits well to different models of hoods of the same size.
Which one is better to choose
So, having understood the structure of all types of filters installed in kitchen hoods, we come to the main question. which one is better?
There is no definite answer to this question. It all depends on the needs of the particular user, the features of his kitchen space, the budget that he is willing to spend.
The most popular were and still are the usual hoods with air vents and grease-retractable (perpetual) filters. There is no need to install carbon filtration systems in such designs: heavy and polluted air is still output to the shaft or outdoors.
How to replace Carbon filters in your cooker hood | by Hotpoint
Choosing such a hood, you should pay attention to the motor power. It is the one that will determine the efficiency of the appliance.
If we consider the quality of reusable grease filters, the first place is taken by stainless steel grids, the second by galvanized steel and the third by aluminum alloy. It is better not to take hoods with disposable filters, otherwise you will have to constantly monitor their frequency and the availability of replacement plates.
Recirculation models with charcoal filters are suitable for kitchens where it is difficult to vent to a shaft or outdoors.
The quality of the filter itself is important in selecting such a filtration system. The higher it is, the better will be the microclimate in the room. It is worth giving preference to proven brands, such as:
Nowadays you can find universal activated charcoal filters for various kitchen hoods that fit most models with standard parameters. For those who are very concerned about the atmosphere in their home, it is recommended to take these types of filters.
Do not forget that any filtering system requires monitoring. Reusable grids need to be washed regularly, disposable grease and charcoal grids need to be replaced on time.
For removing stubborn grease marks very effective products are now available that allow you to easily remove even very dirty surfaces.