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3 Main Characteristics to Consider when Buying a Robot Vacuum

Filtering system

The filtering system is also important; it will usually be EPA or HEPA (H is for High, HEPA with H is more effective), although there are different grades within each of these (you can visit our guide on HEPA filters for more information).

As a guideline, EPAs will normally be EPA 11 (95% efficient in trapping dust and mite micro-particles) or EPA 12 (99.5%), while HEPA is filters that achieve an efficiency of 99.95% or higher.

If you have animals and/or a respiratory or allergy problem, we recommend that you opt for those that have a HEPA filtering system, such as the Conga 3090, for example.


i). Side brushes

Brushes are another element that differentiates some robots from others. As for the side brushes, which are the ones that trap dirt towards the inside, especially on edges and corners, there are robots that have two and others that only have one.

Many users believe that robots with two side brushes are more effective, as they will more easily capture dust. However, curiously, high-end robots usually have only one. Why?

Robots with a certain level are powerful enough to effectively suck up dust, dirt, or particles of a certain size.

In addition, they know where their side brush is located and they have a more or less sophisticated navigation system so that they “are aware” of where they clean. For this reason, the side brush is used mainly to collect dirt in corners and corners.

On the contrary, if the robot is cheap and has a limited navigation system, it may be interesting that they have two side brushes.

The side brushes are usually made of synthetic or silicone bristles, and usually have three blades, although lately some models with 5 blades have come out, such as the Roborock S6 or the Roomba S9.

Finally, note that in some cases, the brushes are assembled and disassembled by pressure, while there are models in which they are screwed.

ii). Central brush

The central brush of the robots is usually, in many cases, a combination of bristles and silicone, which improves on the old bristle brushes.

However, the high-end Roomba and the new generation ones, such as the E5, stand out for their double AeroForce rubber brush, which effectively traps dirt, largely avoiding tangles. Some brands, such as Conga, in its 1090 model, opt for two interchangeable brushes: one, the usual one, and another made of silicone, especially for pets.

The central brush is usually rotating, contributing to the good cleaning of the home, especially in carpets and rugs, where it helps to deepen.

However, on carpets with very long pile, they can cause tangling problems, so it may be necessary to remove it, or opt for another option, robots without a central brush.

Robot dimensions and shape

a). Dimensions

The size of the robot is an aspect that is often not taken into account, but to which it is necessary to dedicate some time, even if it is minimal. Some users complain, once the robot is bought, that it is not able to pass between the legs of some furniture or under an element. Therefore, it is important to consider it beforehand.

The diameter of the robots is usually between 30 and 35 centimeters (although it is also possible to find a smaller robot, such as the Deebot Mini or the Dibea D850), and the height is usually between 7 and 10 centimeters (as we have already mentioned, robots with laser navigation are usually the tallest, due to the turret they carry), although here it is also possible to find some thinner ones, such as the Deebot Ozmo Slim 10, below 6 centimeters.

b). Shape

Most robots are round. Although this is the usual way, there are some brands that offer other interesting alternatives.

Round vacuum cleaners may have some difficulty cleaning nooks and crannies if the length of their side brush is not enough to reach those areas.

For this reason, one of the options is the one LG has chosen, through its HomBot robots, which have a more square shape (such as the VR8602RR). In this way, they achieve effectiveness in corners and corners of up to 96%.

Another option is the one represented by the D-shaped robots, that is, one side is curved but the other is flat. In this way, the robot can perfectly approach the corners and corners, doing a great job in those areas.

The main representative of this design is the American manufacturer Neato, a brand of high quality and high performance, not excessively known in Spain, but which in the United States is Roomba’s main rival (in addition to having certain parallels in its origins). Devices like the Neato Botvac D7 or D6 are among the best options on the market today.

Also, another robot that we cite in this review, the Dibea D850, has a D shape, and the latest Roomba launch, the S9 has also opted for this design, to try to improve cleaning in these more complicated areas.  The best vacuum for berber carpet that helps to clean the dirt and debris quickly with its latest technology. A list of some of the best vacuum for berber carpet can help you to find the best choice for your home or commercial use.

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