Most kitchen work is accompanied by odors that can persist for a long time. To prevent the spread of aromas in the apartment, forced air ventilation is organized. It is important to purchase a carbon filter for the hood if you install a recirculation type of device that does not need an air duct. In addition to helping to eliminate odors, the filter also removes dust particles and other impurities from the air.
Why activated carbon filter is used?
The work of any hood is based on air purification and the prevention of cooking odors in the kitchen. The principle of operation of a carbon filter for a kitchen hood is based on purifying the air passing through it not only from the smell but also from small particles of dust, dirt, and grease. Externally, the device is a rectangular cassette installed in a plastic case. Sometimes in retail outlets, you can find options made of synthetic material.
There are also differences between the filters that are used in circulating hoods. So, a cartridge-type filter has an adsorbent located inside. In the case of using a textile filler, the active ingredient is an impregnation. Universal exhaust filters provide a high degree of protection of the air flow from both harmful impurities and hot steam particles.
In a carbon filter cartridge, the active ingredient is small granules of activated carbon or even carbon powder, the main feature of which is the ability to absorb and retain various impurities contained in the drawn air. With active use, the filter on the hood is recommended to be changed at least once every 4 months. The cleaning element is installed immediately behind the grease screen, which protects it from the ingress of large fat particles that can disrupt the operation of the carbon sorbent.
Interesting information! The purchase of a carbon filter for the hood in the kitchen allows you to make the appliance work efficiently and to establish a microclimate inside the room. And the constant use of a charcoal hood not only helps to reduce air pollution, but also protects kitchen furniture from plaque and grease particles that form during kitchen work.
Various types of activated carbon are used for the production of filters: stone, peat, or coconut. For production, impregnated coal is also used, which is a stone or coconut material treated with special compounds and certain reagents that increase its operational capabilities.
Filters are classified according to their application. So, many companies, in addition to filters for household use, also produce industrial options, which differ not only in appearance but also in weight. Some models of industrial filters reach a weight of 300 and even 400 kg. Such options for carbon filters are appropriate to install in public institutions and in production.
It is interesting! Some types of carbon filters are designed for installation in waste water treatment plants in order to absorb organic pollutants. They differ not only in the granularity of the coal content, but also in shape, because they can be concave or convex.
What does a carbon filter do in a range hood?
Carbon deposits, dust, small particles inevitably appear during the cooking process, and range hoods prevent them from settling on various surfaces. Unlike extraction grease filters, the carbon cartridges can be replaced depending on the degree of soiling.
Another distinguishing feature of them (in comparison with conventional air duct hoods) is the fact that the air, passing double filtration, is not discharged into the ventilation shaft, but returns to the room. This is especially true if a gas boiler is installed in the kitchen, which consumes a large amount of air. During an hour of operation, the device can cope with cleaning from 2.5 to 22 thousand cubic meters of air, and the aerodynamic resistance reaches 120 Pa. It is important to note that for normal operation of the hood, it is required that the humidity in the room does not exceed 70%.
The direct operation of filters for a kitchen hood is provided by turning on the motor, which supplies the air flow to the hood through one or more fans. In this case, the carbon adsorbent is capable of absorbing harmful impurities, and the inner filling of the cartridge also absorbs light ions. In some cases, the degree of filter contamination can be estimated by the increase in its initial mass, as well as by the change in density. In order for the hood to work efficiently, you should constantly monitor the cleanliness of the filter, especially during prolonged work in the kitchen.
The combination filter works slightly differently from the conventional carbon filter. In this case, at the first stage, the polluted stream enters through a dense synthetic textile layer, in which there is a carbon impregnation. Most often, viscose acts as a synthetic textile, on which most of the large particles remain.
After the first stage of cleaning, the second begins, which consists of passing air through the cartridge with carbon granules. The result of this double purification is truly clean air that does not have any foreign smell.
For ease of use, many modern hoods are equipped with special sensors that signal the need to replace a dirty filter. This helps to extend the life of the instrument and to ensure efficient cleaning of harmful particles.
What are the benefits of a carbon air filter?
There is a big difference between different types of filters. This is due to the fact that anti-grease aluminum filters for extraction are considered to be designs that provide coarse air purification, while after using carbon cartridges, the flow is freed from both large and small air polluting particles.
Important! The main purpose of anti-grease filters is to protect the fans located inside the hood, and the result of the use of carbon cartridges is complete air purification.
The main advantages of carbon filters (relative to ordinary aluminum ones) are considered to be a good work result and high-quality air purification from odors, as well as the ease of replacing contaminated elements. To change the carbon filter, you do not need to contact a specialist or do not use the device for a long time. It is not necessary to choose the most expensive types of filters. There is always the possibility of purchasing more affordable options that are not inferior in quality to the original cartridges.
The undoubted advantage of using coal systems, in comparison with ordinary grease systems, is the fact that the smells coming out through the ventilation shaft will not irritate the neighbors, since the air does not leave the kitchen.
Among the disadvantages of installing coal systems, one can single out the fact that for the most part, they are disposable, in contrast to aluminum filters for hoods, which, as they become dirty, can be washed and cleaned using simple methods. If the carbon cartridge is heavily soiled, the air is practically not cleaned.
How to change carbon filters in hood ventilation
Before installing a built-in hood with a carbon filter, you should pay attention to the manufacturer’s recommendations regarding which replacement cartridges are required for it. This is due to the fact that many firms set certain restrictions on use and replacement. So, on average, it is recommended to replace the cleaners at least once every 4-5 months, and with infrequent use, it is permissible to stretch the terms up to 6 months.
The carbon filters for the hood of the German company “Bosch” are designed to operate throughout the year because reliable adsorbents are used in the manufacture, and the build quality of the device is at a high level. Of course, the price of these filters will be significantly higher than the cost of products of other less popular brands, but the cheaper the cartridge is, the more often it will have to be changed.
Helpful information! Before purchasing additional carbon filters, you should study the technical part of the issue, clarify for what period of use the design is designed. It should not be forgotten that the service life of the filter can both increase and decrease: it all depends on how often and for how long the hob is used.
You need to understand that it is impossible to clean the used carbon filter with your own hands because the main component is finely crushed coal that cannot be recycled. Most often, manufacturers recommend purchasing cassettes of their own production, although there are universal carbon filters for hoods that can be installed in a device manufactured by any company.
The purchase of such a product allows you to save time searching for the desired option. After the purchase, it is important to adhere to a certain algorithm to carry out a safe replacement of the part.
Can charcoal filters be cleaned and reused?
Some cassette designs offer the ability to open the case, which allows you to replace content as it gets dirty without buying an entire cassette. To perform this action, after the filter has expired, it is necessary to pour out the dirty filler and add new granular activated carbon. The updated cassette is then assembled and reinstalled.
The correct installation of the filter is indicated by a characteristic click. If the installation is not carried out correctly, most likely the device will not turn on. Similarly, in the future, you can update the contents of the carbon filter for the hood with your own hands.
In order to extend the life of the cleaning cartridge, experts recommend leaving the device to work for an additional 4-5 minutes after the installation is completed. During this time, drier air passes through the mesh on the hood, and the contents of the carbon filter will dry out, which will prevent it from pressing. In addition to ensuring a longer life of the cartridge, this simple manipulation will help to extend the operation of the hood itself.
Another point that allows you to increase the life of the filter is keeping the grease mesh clean. The cleaner it is, the less likely large particles will get onto the sorbing element. This means that the coal will retain its loose state longer, especially since the anti-fat cleaning process does not take much time. Basic mesh cleaning options:
- wash the part in soapy water or a good fat-dissolving detergent using a stiff brush;
- pour over with boiling water and grate with a soda-based paste;
- clean with a directed jet of hot air from a household steam cleaner;
- pass through the wash cycle at the highest temperature in the dishwasher.
Users note that any of the methods allow you to make the grease trap cleaner, but the best result can be achieved only after mechanical action on the part with a brush. It should be borne in mind that the installation of the mesh in place should be carried out only after complete drying, otherwise it will quickly clog up again.
When buying a hood, it is additionally recommended to take into account the fact that some models are produced without a grease mesh. Such devices are not advised to choose due to the fact that there is a large load on the carbon filter, which, in addition to small particles, has to filter large, wet, and oily particles. All this affects the cleaner and leads to its rapid failure. For this reason, it is better to give preference to hoods with a grease trap.
How to choose a carbon filter for the range hood?
For the most part, the carbon filter is suitable for use in a variety of hood models. Any consultant in the shopping center will help you choose the right option for a specific device. But nevertheless, experts recommend inquiring about the possibility of purchasing and replacing filters before buying a circulating hood, and it is even better to immediately buy several replaceable filters, which will be enough for 1-2 years of use.
Helpful information! When buying a carbon filter from a source other than the hood manufacturer, pay attention to the box. Most often, a list of hood models is indicated on the packaging, which are designed for the installation of a specific filter. It should be borne in mind that the shape of the filter must be selected depending on whether the device has a pull-out panel or it is a stationary version.
You should not rely on the fact that a cooker hood with a carbon filter, regardless of the area of the room, is able to completely rid the kitchen of odor and prevent its spread throughout the home. Recirculating devices, like ordinary ones, are designed to purify a certain volume of air, therefore, before buying, you need to pay attention to what area the device is suitable for in the room. Often, coal hoods, in contrast to flow-through ones, are 20% less efficient.
The choice of a filter element should be done thoughtfully in order to acquire a truly correct design because it will not be possible to place a synthetic version of the purifier in a place designed for installing a cartridge. Very often, due to the lower cost, users purchase filters made of synthetic fabric, not taking into account the fact that they are not suitable for many models of coal hoods. Even if it is possible to install the structure, the performance of the hood will be significantly affected by this.
Despite the fact that cheaper universal filter systems have been invented, it is still recommended to give preference to the models of the same manufacturer from which the hood was purchased. It is precisely the cassettes designed for a specific version that will ideally occupy the niche intended for them, which will ensure a more efficient operation of the device.