First of all, the product’s effectiveness and efficiency should be ensured; this is more precisely possible with the Clean Air Delivery Rate (CADR) machine, which indicates how effective the cleaning of the air in a room is.
The CADR score indicates how much-filtered air a cleaner delivers to the room in which it is located. Essentially, each air purifier we reviewed has three separate CADR scores: one for smoke, one for dust, and one for pollen. The higher the CADR values, the better the machine is at eliminating air pollutants in your home. Note that not every air purifier on the market has CADR scores, making it difficult to compare them to others.
CADR scores can also help determine the right device in for a room.
AHAM takes the smoke CADR score and multiplies it by 1.55 to determine an air purifier’s recommended room size.
As a rule of thumb, never use an air purifier in a room larger than the recommended size, as it does not become efficient or even useless.
Another important decision-making feature is the air purifier’s cleaning interval, which indicates how often per hour, the air purifier can actually clean the air.
This specification tells you how often the machine can filter the air in a room every hour, which is especially important if you have allergies and alleviate your symptoms. The more air changes a cleaner can perform, the more the air circulates in your room, reducing the pollutants.
Another element to consider is the airflow of an air purifier or, more simply, the speed of air pressed through the filters and cleaning systems.
The airflow is measured in cubic feet per minute. In general, one can say that the higher the airflow, the better.
While you are looking for the best air purifier for you, make sure it uses a HEPA filter.
This filter can remove 99.97 per cent of the 0.3-micron particles. HEPA filters are the industry standard because they can remove particles, which is not guaranteed for other filters. Many cleaners include an additional pre-filter, which captures larger particles so that the HEPA filter does not have to be replaced as often. Also, the pre-filter helps to eliminate odours.
Some air purifiers contain additional filters, which then remove particles such as pet dandruff and germs.
Some manufacturers also use ultraviolet (UV) bulbs as a cleaning method, but its effectiveness is disputed.
Although UV light is a common method of sterilizing medical devices, these contaminants are exposed to UV light for a long time in a controlled environment.
In general, however, the UV cleaning stage is harmless with an air purifier.
How to Choose Air Purifier | Everything You Need to Know
Air Purifiers: What to Look out for
During our review of the air purifiers, we tested the noise level, airflow and energy consumption.
This allows us to ensure that we can also recommend the right product for your needs.
Before choosing an air purifier, consider the room in which you want to use it.
If the machine is to be used during the day, for example, the air purifier’s volume is more of a secondary role in the kitchen or the living room.
Keep in mind that many of these cleaners can reach 60 dB or more, which is about as loud as a vacuum cleaner.
However, if you are looking for an air purifier that you want to use in your bedroom at night, e.B. while you are asleep, the noise level is an important decision criterion.
For a bedroom air purifier, a noise level of less than 30 dB is recommended, which is about as loud as a whisper.
Another feature to consider is airflow.
We tested every airflow of the air purifiers and then compared them with the manufacturer’s specifications. Here we came up with similar results.
This means that the listed airflow in cubic feet per minute, which the companies indicated, can also be included in your decision.
The airflow allows you to see how many air changes occur in an hour, which is especially important if you suffer from allergies. The more air changes a cleaner performs per hour, the better it is for people who have allergies or want the cleanest air.
Finally, we measured how much energy each machine consumes at its maximum settings.
What to choose an air purifier?
One of the most important features is the surface area of their purifier.
Of course, the size of the room also plays a decisive role here.
You want to make sure that the air purifier can also completely clean the room in which it is located. However, you don’t have to worry if the air purifier covers a larger area than the room huge.
Lower frequencies and programs can also be set here. A high-performance air purifier is recommended if you suffer from allergies, as it can clean the air in a room much more frequently (several times an hour). For example, if you have a room that is about 250 square meters in size and you buy a cleaner that can perform an air change per hour in rooms of up to 500 square meters, you have an air purifier, which can perform two air purifications per hour for the entire room.
How the air purifiers work
One of the first things you’ll notice when you’re looking for an air purifier is a set of numbers in the CADR specifications.
These figures indicate how effective the device is in cleaning smoke, dust and pollen from the air, which may carry pollutants or may be harmful itself.
The higher the CADR rating for a particular particle, the better it is to remove that substance from the air.
Part of what makes an air purifier efficient is its ability to transport air through its system.
For this reason, pay attention to airflow and air changes per hour, as this information will tell you how quickly the air purifier can clean the air in a given room.
Also check how many cleaning cycles each machine has, the more filters and cleaning cycles a machine has, the more opportunity it has to clean pollutants in the air.
ALSO, a big advantage is HEPA filters, removing 99.97 per cent of the small particles from the air.
Many air purifiers also use a carbon pre-filter to detect larger particles, so you don’t have to replace your HEPA filter often, which can even reduce strong odours.
There are also alternative cleaning methods of the individual air purifiers for these filters.
First, some models use ionizers to load particles as they pass through the machine to attach to a surface and thus move away from the air.
These devices produce small amounts of ozone, which is harmless. Nevertheless, devices that can also disable the ionizer are beneficial.
Also, some models use UV light to sterilize the pollutants. However, the effectiveness of this technology is disputed.
However, if you are not satisfied with other air purifiers, an experiment with a UV model would certainly be an alternative.
Also, many air purifiers have a sleep – or
Sleep mode that sets the device to the lowest fan setting.
Thus, the air purifier can still be switched on, and you can sleep without any problems. Some models even dim the lights or have an auto-adjust function.
In general, air purifiers with automatic detection of pollutants and alternating cleaning intervals are also useful.
Energy & Certifications
One of the first things to keep in mind that any new device is the cost of energy.
Although a device’s energy costs cannot be decisive, the electricity bill is added up by all electrical appliances. Therefore, it makes sense to pay attention to low power consumption for any electrical device.
Look for an air purifier that doesn’t consume too much energy, which can save you long-term savings.
On average, we found that air purifiers require around 86 watts of energy at their highest settings.
There are also certified products that meet certain safety standards, such as UL and CARB standards.
Where should the air purifier be placed in the room?
Before we deal with the different air purification methods, it is important to clarify where to place your free-standing air purifier.
One principle here for the place is that the air purifier should preferably be located in a central location in the room to be cleaned as much room air as possible.
A location in corners or space-saving niches is not recommended for an air purifier.
This device is designed to flow around as freely as possible from all sides with indoor air to take place sufficient throughput of cleaning.
Also, the placement behind bulky chests of drawers or large objects is not advisable because they prevent the free circulation of the room air.
Setting up in front of the window is often incorrectly done by many users. Again, this is not the right place, because as I said, the air purifier belongs centrally in the room.
The best possible performance for the air purifier filter is best chosen when the device is free and open in the room.
This may not always be the optimal solution visually, but it ensures efficient operation.
Thanks to these operating rules, you can look for a place for an air purifier, and many offered devices hardly stand out with their good design.
How long should an air purifier be run?
The operation of an air purifier depends on your own claim to good indoor air.
The seasonal and climatic conditions factor are also very important when it comes to the question; “How long should the operation take?”.
Good indoor air and a healthy climate are important living conditions, and some people need permanent support from an air purifier. When operating and using it for the first time, you first notice how polluted indoor air is, especially in cities.
To answer the question, you can permanently operate this device as long as you are in these rooms.
However, it is also possible to choose specific time phases of use, because these devices sometimes have timers to set intervals.
As I said, the operation of an air purifier is also dependent on the season. Especially in parched months of the year, the operation of an air purifier should be intensively operated. By soiling the filters, it is also possible to determine how intensively the room air is contaminated.
This means that you should look closely at these devices and some manufacturers make recommendations about the duration of use. Here the rule of thumb is that the room air should be cleaned at least once every 2 hours.
How often should the FILTER be changed with the air purifier?
The manufacturers of the air purifiers make a recommendation for the filter change for each device.
This information for the rotational change can be found in the operating instructions.
However, many users of air purifiers believe that these deadlines should be delayed.
This is a flawed assumption because only if an air purifier works with a clean filter, can this device achieve the optimal filter performance of 99% of particle filtering.
However, this does not mean that a filter should be changed daily, but these filters have a load limit of the intake.
However, this contamination can be visually checked by a control view, and if one thinks that this is too dirty, then the filter should be changed.
The filter’s load depends on the load from external influences, so filters should be changed more frequently in spring during heavy pollen flight.
By the way, changing the filter with the air purifier is very easy. The housing is opened at the appropriate opening, and the dirty filter is then removed.
However, one should avoid the natural contact with this filter and use disposable gloves and a mouthguard for removal, because, in the filter, the harmful particles are concentrated.
The dirty filter should be put immediately in a garbage bag not to lose its collected dirt.
New filters, on the other hand, can be easily inserted back into the device with your hands and then you close the opening, the new operating cycle can begin.
In this topic, you as a user, read and know the user manual and the instructions for changing the filter.
The manufacturers have installed different systems here, but it is always easy to change a filter. When it is scorched and dusty in the ambient air, the filter should be changed if possible once or twice a month.
The filter change is also associated with the frequency of air purifiers’ frequency, because the more frequently the air purifier runs, the higher the dirt of the filter.
How does an air purifier WORK?
How exactly do these devices work? This is a critical issue because trade offers different systems.
With ionizer or only as a pure air filter, these are the typical features.
Manufacturers also offer mixing systems equipped with an intensive air filter and a coupling with an ionizer.
To explain the effect of ionisatiorization of air, it is sufficient to know that the air purifier’s air is statically charged.
The enrichment of the air with positively and negatively charged molecules ensures this static charge, thus magnetising the device’s dust.
The static charge in the air purifier efficiently binds the particles of house dust, pollen and other polluting particles.
However, the air is then fed and cleaned to the air purifier filter in the same way. In the same way, there is air purifier without ionization; here the room air is sucked in over a fan and then also cleaned in the air filter.
In the filters offered air purifiers, there are additional systems that enrich purified air with moisture and ensure the room’s optimal humidity.
These are air conditioners that offer more comfort as an air purifier.
What do air purifiers do?
Air purifiers provide clean air with their efficient effect and can ideally improve the climate in the room.
Clean air is important because in a high-tech society, especially in urban areas, there are many bad air emissions in rooms.
Normal breathing air also has many negative substances in buildings’ outer environment, such as particulate matter and pollen, which then penetrate the rooms.
The operation of electrical equipment in rooms, the vacuum cleaner’s actuation, and other activities cause these particles to become active in the room air. These substances, such as dust and particles, are swirled by these activities in the indoor air.
The air purifier sucks in all the room air and filters this polluted air.
Also, the improvement of the indoor climate via an optimal humidity optimally improves the room air with an air purifier’s operation.
This can optimally perform air purifiers and overall, air purifiers improve the breathing air so that the user no longer has tearful eyes and inhales fewer pollutants.
Air purifiers thus improve breathing air and provide ideal room conditions for allergy sufferers, for example.
What should be considered for an air purifier when purchasing?
There are two good reasons for choosing an air purifier.
First, there is the room’s size and the intensity of the cleaning of the room air.
We remember that the manufacturers have provided for cleaning the air in rooms for about every 2 hours.
On the other hand, the manufacturers have adapted the square meter to their devices’ room size.
This means that the device’s choice means that one should follow the specifications of the performance that the manufacturer has indicated to the device.
Too large devices in too small rooms are oversized and too small devices for too large rooms are also inappropriate.
This is logical and is based on the information provided by the manufacturers.
The second factor for selecting the air purifier is the requirements for the filters.
On the one hand, ionization cleaners and air purifiers with special HEPA filters are especially suitable for allergy sufferers.
Therefore, people who complain of allergic diseases should always opt for devices with HEPA filters because the other designs will produce little relief here.
However, there are also clear principles here, such as devices equipped with an active-coal filter, prove more advantageous than to endure an indoor climate without an air purifier.
After that, you can turn to the factors noise pollution of the device and power consumption.
Good indoor climate should also be worth a cost contribution, and the device has very different consumption values for electricity demand.
These are the basic criteria that can be used to make your choice for the right air purifier.