There are currently several major brands (Philips, Dyson & Rowenta) that offer models that are just as different from each other.
As a rule, an air purifier is for domestic use. But it is also possible to use it in more professional environments such as offices.
It is therefore important that you know which one to choose.
Like any other device, an air purifier has properties that differ from model to model.
So let’s consider the essential stipend before you buy an air purifier!
How to Choose Your Air Purifier? Step by Steps
The first point to consider: The filter system
This makes the difference between the air purifiers that are currently on the market.
In fact, each brand offers different filters, all of which are effective.
- The pre-filter is a plastic or metal fabric that holds back dust particles that can enter the air purifier. This first filtration step limits the deterioration of other filters.
- The HEPA or high-efficiency particulate filter is a classic and mechanical system. The air is driven through the filter to hold particles larger than 0.3 microns. It is mainly used for bacterial or veneer diseases or the risk of spreading pathogens.
- Ionization filtration consists of a physicochemical process. It is often ozone-free. The peculiarity of this system, however, lies in the properties of the particles in the air. It should be noted that particles (pollution) are either neutral or positively charged. Through ionization, they turn into anions to rush into positively charged areas. In this way, the air is cleaned.
- Combustion filtration consists of heating the air. The air purifier burns the particles in the air purifier with a filament or resistance that reaches 200 degrees in suspensions, such as spores, fungi, pollen or other bacteria. However, you don’t have to worry about hot air, as it is cooled immediately at the outlet.
- Plasma filtration, a process that uses this state of excited or heated material. In the case of plasma air purifiers, oxygen is stimulated to produce an oxidizing molecule. This is thrown into the room to clean the air. Cleaning is therefore not carried out inside the device, but outside, at the time of evacuation. This system acts on microorganisms such as bacteria and viruses and volatile organic compounds. However, it is intended for industrial use, as this type of air purifier charges the air with ozone and other free radicals.
- Photocatalytic filtration, which consists in directing air through titanium dioxide nanotubes. Thanks to the ultraviolet rays, titanium dioxide produces oxidation of pollutants, which converts them into water vapour and carbon dioxide.
The second point to be taken into account is the cost of maintaining the filter and the device
Before purchasing an air purifier, it is important to know the necessary maintenance for the device type.
This depends, among other things, on the filter system installed in the air purifier.
If the model is equipped with a HEPA filter, it is sometimes washable. Sometimes it is necessary to replace them. If it is a standard filter, it is easily available on the market or on the Internet.
If the filtering is carried out by combustion, ionization or photocatalysis, details of the maintenance of this type of filter are often noted in the instructions for use of the air purifier. However, their maintenance is more frequent than with a HEPA filter.
Most manufacturers predict the wear time of the filter. This makes it easier to plan for the exchange. In fact, the lifespan of the filters varies from brand to brand, which can be confusing for those who have already used an air purifier.
The third point to consider: the noise generated by the turbine
The noise generated by the rotation of the air purifier turbine is a point that should not be negligible.
When you are in a professional environment, it is often annoying to have a constant noise near you.
According to studies, the machine begins to interfere with more than 50 dB. When operating at night, it is, therefore, advisable to pay attention to the noise level of the device, which is often indicated by the manufacturer.
The fourth point to consider: the price you have to pay for a good air purifier
Apart from the models for large corporate offices and shopping centres, costs of more than €500 are still expected.
This is usually the range of professional equipment.
There are also cheaper devices that are obviously less efficient than big brands. It still makes sense to have a device instead of inhaling all the current pollutants.
For non-professional household appliances, the only drawback is the frequency of filter change during the year.
Otherwise, the quality of the products and their effectiveness is appropriate in relation to the price. These models must not exceed €500.
The fifth point to consider: air purification performance and volume
If you are planning to buy an air purifier, it is important to know the size of the room in which it is to be installed.
Depending on the brand and model, the optimal area can range from less than 5 m2 to more than 150 m2.
There are therefore models that are suitable for small rooms, but also for large rooms such as medium offices.
Sixth point to consider: air volume flow
During the cleaning process, the device sucks air in and out. A good air purifier is characterized by its ability to renew the air in a room several times an hour.
Some models are able to produce a relatively large amount of air. It varies from 100 m3/h to 500 m3/h as required by the user.
Seventh point to consider: the level of energy consumption
With a conventional air purifier with HEPA filter, the power consumption is only for the turbine that runs with an electric motor.
The other modern and technical models have a higher consumption due to the equipment that equips the device (ionizer, combustion thread, UV light, etc.).
For example, with an air purifier with two (02) planes, consumption can be between 3.5 W and 60 W. In a more sophisticated model, there are five (05) filter levels.
The power consumption can then continuously increase to 90 W.