Question 1

What makes TEQOYA air purifiers different from others?

Accepted Answer

TEQOYA air purifiers aim for the best balance between effectiveness, safety, ease of use and durability:

They remove up to 99% of airborne pollutant particles (tests and certifications), and also act on pollen, mold spores, bacteria and viruses.
Their patented technology, designed and made in France, does not emit toxic substances, and in particular no ozone.
They have no disposable filter to replace, so there is nothing more to buy.
They use up to 2 W for an ionizer and 10 W for the E500 at maximum speed, far less than a standard HEPA filter air purifier, which typically uses 30 to 80 W for a 30 m² room.
They are easy to maintain and quiet (the ionizers have no fan at all).
They are built to last and come with a 5- to 10-year warranty, depending on the model.

Question 2

Why choose a TEQOYA air purifier over a HEPA filter air purifier?

Accepted Answer

TEQOYA air purifiers and ionizers avoid the two main drawbacks that users find with HEPA filter air purifiers: frequent and costly filter replacement, and a poor fit with everyday life (bulk, energy use, noise).

By their very principle, HEPA filter air purifiers also increase the carbon footprint of their use (disposable filters, powerful fan). TEQOYA designs air purifiers that are effective, comfortable to run continuously and low in carbon footprint:

High-performing: TEQOYA air purifiers remove up to 99% of particles (allergens, smoke, cooking particles...) without emitting toxic substances. Their performance changes little over time, whereas that of a HEPA filter air purifier depends on how clogged the filter is.
Economical: they have no disposable filter to replace, use very little energy and are built to last, which reduces waste and running costs.
Discreet and quiet: compact, they blend into your home. The ionizers, with no fan, are particularly well suited to bedrooms and quiet rooms.

The safety of TEQOYA air purifiers has been verified by several laboratory test protocols (tests and certifications).

Question 3

Why choose a TEQOYA ionizer over any other ionizer?

Accepted Answer

Because TEQOYA's patented technology releases a large quantity of negative ions without emitting ozone, which is not the case for many conventional ionizers. Ozone is a powerful oxidant that irritates the airways.

Ozone-free ionization: the absence of ozone and other secondary pollutants is verified by independent laboratories. Our test reports are published on our website (tests and certifications). Before buying an ionizer, or any other air purifier, we recommend checking that such reports exist.
Effectiveness: TEQOYA ionizers remove up to 99% of airborne particles, and also act on allergens and microorganisms.
Safety: they have no exposed electrostatic collector, which can cause electric shocks.
Simplicity: with no filter to replace, all you need to do is clean the ion optics once or twice a year.
Durability: with no planned obsolescence, they come with a 10-year warranty (T200 and T450) or a 5-year warranty (Nomad), and they are quiet and very energy-efficient.
Quality: every TEQOYA device is manufactured, calibrated and tested in our factory in France. We pay constant attention to quality, and our after-sales service cares about the satisfaction of every customer.

Question 4

Where are TEQOYA air purifiers made?

Accepted Answer

TEQOYA air purifiers are designed and made in France, in our factory in Villandraut, in the Gironde region. Every device is manufactured, calibrated and tested there before shipping. Our suppliers are French and Spanish, which keeps transport to a minimum.

This local manufacturing is part of our eco-responsible approach, with devices that have no disposable filter, use little energy and are built to last.

Question 5

How are TEQOYA air purifiers eco-friendly?

Accepted Answer

TEQOYA air purifiers are designed to limit their environmental impact over their entire life cycle:

No consumables: the ionizers have no filter, and the filter of the TEQOYA E500 is washable and reusable for the whole life of the device.
Low energy use: always under 10 W (E500 at full speed), and 0.7 W for the Nomad.
Durability: quality components, no planned obsolescence, and a 5- to 10-year warranty depending on the model.
Repairability and recycling: parts that can be separated, which makes repair easier and then recycling at end of life.
Made in France, in the Gironde region, with nearby suppliers.

Question 6

How much energy do TEQOYA air purifiers use?

Accepted Answer

Very little, always under 10 W:

TEQOYA E500: 3 W on average (from 0.4 to 10 W depending on speed);
TEQOYA T450: 2.2 W;
TEQOYA T200: 1.2 W;
TEQOYA Nomad: 0.7 W.

Relative to their clean air delivery rate (CADR), they generally use 2 to 3 times less energy than commercially available HEPA filter air purifiers. They can therefore run continuously for an electricity cost of a few euros a year.

Question 7

Do TEQOYA air purifiers become less effective over time?

Accepted Answer

No. With no disposable filter to clog up, TEQOYA air purifiers stay consistently effective throughout their service life, provided they receive simple maintenance. This is one of their main advantages over conventional filter air purifiers. They come with a 5- to 10-year warranty, depending on the model.

To keep them effective, dust the ion optics once or twice a year, depending on the pollution level in your environment. For the TEQOYA E500, also clean the filter every 6 months to 1 year.

Question 8

Which pollutants do TEQOYA air purifiers act on?

Accepted Answer

TEQOYA air purifiers act on airborne particles of all sizes: from ultrafine (PM0.1) and fine particles (PM1, PM2.5) up to the largest ones (PM10).

They act on all types of particles:

biological particles: pollen, mold spores, dust mite allergens, bacteria, viruses;
combustion particles: smoke from tobacco, incense and candles, traffic pollution;
SVOC (semi-volatile organic compound) microdroplets;
mineral particles.

However, they do not remove gaseous pollutants, such as VOCs (including formaldehyde), radon, nitrogen dioxide or CO2. Against these gases, ventilation remains the first solution.

According to the WHO, exposure to PM2.5 (particles less than 2.5 µm in diameter) is associated with more than four million deaths worldwide each year, and chronic exposure increases the risk of chronic diseases. PM stands for “Particulate Matter”; 1 µm equals 0.001 mm.

Question 9

How do TEQOYA air purifiers remove fine particles from the air?

Accepted Answer

They give particles an electric charge with negative ions, and the charged particles are then removed from the air. TEQOYA uses two patented technologies, depending on the model:

The ionizers (T200, T450, Nomad) release negative ions directly into the room. The charged particles are drawn to grounded surfaces, mainly the floor, by electrostatic attraction (a physical phenomenon at work in nature).
The TEQOYA E500 air purifier uses e-filtration: a fan draws in the air, the particles are charged and then captured in a washable, reusable electrostatic filter inside the device.

In both cases, the ions are produced without emitting ozone or other by-products. These technologies remove up to 99% of airborne fine particles (tests and certifications), and also act on microorganisms and allergens.

Built to last and energy-efficient, TEQOYA air purifiers are suitable for homes, offices and dusty workspaces.

Question 10

Do TEQOYA air purifiers remove allergens such as pollen?

Accepted Answer

Yes. Pollen, dust mite allergens, pet dander and mold spores are particles: TEQOYA air purifiers give them an electric charge and remove them from the air, like other particles.

With an ionizer (T200, T450, Nomad), these allergens are drawn to the floor and other grounded surfaces. With the TEQOYA E500, they are captured in its washable filter through e-filtration.

By reducing the concentration of allergens in the air, an air purifier helps improve indoor air quality. It does not replace treatment: if you suffer from allergies or asthma, ask your doctor for advice.

Question 11

Are TEQOYA air purifiers suitable for people with allergies or asthma?

Accepted Answer

Yes, they can be used by people with allergies or asthma, including in a bedroom and continuously: they reduce the concentration of pollen, dust mite allergens, mold spores and fine particles in the air, without emitting ozone or any irritating substance.

An air purifier is an air treatment device, not a medical device: it does not cure allergies or asthma and does not replace treatment. It complements the measures recommended by health professionals: airing out, regular cleaning and reducing sources of allergens.

For a bedroom, the TEQOYA T200 is silent. For a living area, the TEQOYA E500 captures allergens in its filter, with no deposits on surfaces.

Question 12

Do TEQOYA air purifiers remove bacteria and viruses?

Accepted Answer

Yes. Electrically speaking, microorganisms (bacteria, viruses, mold spores) are particles: they become charged by negative ions just like other particles, and are removed from the air.

With an ionizer (T200, T450, Nomad), the charged microorganisms are drawn to grounded surfaces, mainly the floor.
With the TEQOYA E500, a low-power fan draws in the air; the microorganisms are charged and then captured in the electrostatic filter. The purified air is returned to the room.

Laboratory test results (tests and certifications):

Klebsiella pneumoniae and Staphylococcus aureus bacteria: more than 99% removed in 3 hours;
H1N1 virus: around 75% reduction in viral particles after 25 minutes, in a protocol where the aerosol spends only a short time in the ionized air;
common molds: 99% captured in the filter of the TEQOYA E500.

Question 13

Can TEQOYA air purifiers limit the airborne transmission of viruses such as Covid-19?

Accepted Answer

TEQOYA air purifiers reduce the concentration of airborne particles, including aerosols that may carry viruses, without producing toxic substances (no ozone, no nitrogen oxides). They are not medical devices: they do not protect against any disease and do not replace ventilation or protective measures.

They do not prevent transmission through direct contact or through large droplets (spray from the mouth) expelled at short range. Ventilation, wearing a mask when needed and protective measures remain the first steps to take. An air purifier provides additional protection, especially in enclosed spaces where the air is poorly renewed.

Question 14

Are TEQOYA air purifiers effective against odors?

Accepted Answer

Yes, against odors carried by particles, such as smoke from tobacco, candles or incense, or cooking fumes: TEQOYA air purifiers noticeably reduce them, usually within the days after they are switched on.

They do not act on odors that are gases from the start, such as those from food waste or chemicals. For these, the best solution is to air out the room and remove the source.

Effectiveness also depends on the size of the room and the intensity of the source. Some odors remain noticeable at very low levels: it is normal for a gaseous odor to persist despite the air purifier.

Question 15

Are TEQOYA air purifiers effective against VOCs?

Accepted Answer

No. VOCs (volatile organic compounds), such as formaldehyde, are gases: our technologies, which act on particles, do not remove them.

SVOCs (semi-volatile organic compounds) are a different matter. They are present in the air both as a gas and as an aerosol, in the form of microdroplets. TEQOYA air purifiers act on this liquid fraction. A laboratory test showed that the air purifier speeds up the decay of the aerosol formed when terpenes evaporate, without transforming the gaseous VOCs (tests and certifications).

To remove VOCs, they must either be trapped in an adsorbent material (*) or destroyed by a chemical reaction:

Ventilation remains the safest way to limit VOCs. However, it lets in particles from outdoor air, hence the value of an air purifier that is effective against particles.

ADEME (the French Agency for Ecological Transition) presents the regulatory framework for VOCs.

(*) Adsorption is the property of solid surfaces to bind certain molecules reversibly. Main adsorbents: activated carbon (wood, coconut), zeolites, silica gel, synthetic adsorbents (resins, macromolecules).

Question 16

How long does a TEQOYA air purifier take to clean the air in a room?

Accepted Answer

Our measurements show a reduction of around 50% in particle pollution within one hour, in rooms of 15 to 30 m². In more favorable conditions, during a test by the CERTAM laboratory in a 20 m² bedroom with the door closed, particle pollution fell by 80% in 15 minutes (tests and certifications).

The time needed depends on the size of the room, the pollution level, the air exchange rate and the model chosen. Since pollution constantly enters and builds up again, we recommend leaving your air purifier running continuously (24/7).

Question 17

Does a TEQOYA air purifier have health benefits?

Accepted Answer

A TEQOYA air purifier improves the quality of the air you breathe by reducing the concentration of fine particles, allergens and microorganisms. It is not a medical device, and it does not cure any disease.

Many studies associate exposure to fine particles with health effects, particularly respiratory and cardiovascular ones, and health authorities recommend limiting this exposure, including at home or at the office, where we spend most of our time.

For healthy indoor air, also remember to air out your home every day, clean regularly, prevent mold and limit household cleaning products and air fresheners. If you have a health concern, consult a health professional.

Question 18

What does an air ionizer do?

Accepted Answer

An air ionizer removes airborne particles from the air: fine particles, pollen, mold spores, bacteria, viruses, smoke. It releases a large quantity of negative ions into the room. These ions attach to the particles and give them an electric charge. The charged particles are then drawn to grounded surfaces, mainly the floor, and leave the air you breathe.

This mechanism exists in nature: the air in forests, in the mountains or at the seaside is rich in negative ions.

An ionizer does not filter gases (VOCs, CO2, radon). A poorly designed ionizer can emit ozone: always check that it has independent test reports on this point. TEQOYA ionizers are designed and tested not to emit any.

Question 19

How does ozone-free air ionization work?

Accepted Answer

TEQOYA air ionizers release a large quantity of negative ions into the room. These ions give an electric charge to airborne pollutant particles, which are then drawn to grounded surfaces and leave the air you breathe.

On the technical side, each ion optic of a TEQOYA ionizer has two features:

At the tip of its needle, it produces a negative corona effect: a high electric field zone, smaller than a millimeter, triggers an electron cascade that forms and expels negative ions.
It limits the intensity of this electric field and the current emitted by the needle, which prevents the formation of toxic substances such as ozone or nitrogen oxides.

This principle reproduces the natural mechanism that makes the air in forests, mountains and at the seaside rich in negative ions.

Question 20

Why don't TEQOYA ionizers produce ozone?

Accepted Answer

Because their patented technology avoids the physical conditions that create ozone. Ozone forms when the electric field and the electron density exceed certain thresholds around the emitting tip. TEQOYA ion optics stay below these values. Several patents describe part of this technology.

The absence of ozone emissions has been verified by independent laboratories: a measurement using the standard test applied to air purifiers for CE marking, and a measurement by accumulation over more than 12 hours in a sealed 1 m³ chamber. In both cases, the measured level is very low, at the detection limit of the measuring instruments (tests and certifications).

Question 21

How does TEQOYA's patented e-filtration technology work?

Accepted Answer

E-filtration is the technology of the TEQOYA E500 air purifier. It combines two stages: ozone-free air ionization, which charges the particles, followed by electrofiltration, which traps them in a washable, reusable filter inside the device.

This filter is made of polarized, insulated plates, to rule out any risk of electric shock. It offers very little resistance to airflow (low pressure drop) and can hold a large quantity of pollutants.

The result: effective filtration with no consumables and very low energy use, without particles settling on the surfaces of the room.

Question 22

What is the difference between TEQOYA ionizers and the TEQOYA E500 air purifier?

Accepted Answer

Both use TEQOYA's ozone-free ionization, but they do not remove particles in the same place:

A TEQOYA ionizer (T200, T450, Nomad) releases negative ions into the room. The charged particles (allergens, bacteria, viruses, fine particles) are drawn to grounded surfaces, especially the floor. With no fan, it is silent and does not blow air. The trade-off: the particles settle on surfaces, which can leave marks near the device.
The TEQOYA E500 air purifier uses e-filtration: it draws in the air and traps the particles in a filter that is washable and reusable for the whole life of the device (5-year warranty). It works like a conventional filter air purifier, but with no filter to buy again and very low energy use. It is suitable for continuous use (24/7) in living areas.

Question 23

What is the difference between TEQOYA ionizers and negative ion diffusers?

Accepted Answer

Negative ion diffusers are mainly sold for the sense of well-being associated with ions. TEQOYA ionizers are designed to purify the air: their high, ozone-free ion output removes particles from the air (bacteria, pollen, spores...).

TEQOYA ionizers act on all particle sizes, down to ultrafine particles of 7 nm (0.007 µm). They are silent and very energy-efficient.

A diffuser can also reduce particles, but its output is often low: its effect depends heavily on the size of the room.

Question 24

How many negative ions do TEQOYA ionizers produce?

Accepted Answer

Measured 1 m from the device, the negative ion concentration is 200,000 ions/cm³ for a TEQOYA T200 and 450,000 ions/cm³ for a TEQOYA T450. There are two ways to measure an ionizer's output:

The ion concentration, that is, the number of ions per unit volume of air, at a given distance from the device. It is usually measured at 1 m.
The number of electrons released per second, estimated from the electric current flowing out of the needles. This current is extremely low, but it corresponds to about 1.5 trillion electrons per second for a T200, and about 3 trillion for a T450.

In a room of about 15 m², a T200 maintains a concentration of around 5,000 to 10,000 ions/cm³ throughout the room, depending on the room layout and the position of the device. This concentration is reached within a few seconds, except in very polluted spaces, where the particles capture the ions.

These values depend on the measurement conditions (temperature, humidity, electrostatic environment). When you compare ionizers, check that the units are specified: number of ions per cm³ and at what distance, or number of ions per second. A unit such as “ions/cm³/second” is meaningless.

Question 25

How far do negative ions travel in a room without a fan?

Accepted Answer

Significant quantities of ions are measured up to 3 to 4 m from a TEQOYA ionizer. Without a fan, the ions move under the effect of electric forces:

they are repelled by the ionizer and by the other ions, which have the same charge;
they are attracted by grounded surfaces (floor, walls), which spreads them through the room;
they are attracted by the particles they meet, which they charge.

In a real room, the air is never still: temperature differences, ventilation and the presence of occupants constantly stir it, which further helps the ions spread and the particles mix. The ions spread better if the ionizer is placed near an airflow.

Question 26

How long do negative ions last in the air?

Accepted Answer

Not long: from a fraction of a second to a few minutes. It depends on the chemical nature of the ion, its reactivity and the humidity of the air.

This is why maintaining a constant level of ions in a room requires continuous production, which is what TEQOYA ionizers do when running permanently.

Question 27

Are the negative ions produced by TEQOYA the same as those found in nature?

Accepted Answer

Yes. The ions emitted by TEQOYA ionizers are chemically similar to those in natural air: the vast majority are negative oxygen ions (O2⁻).

They are produced by the corona effect, in a cold plasma confined to a zone less than one millimeter around the tip of each needle. Oxygen is the molecule in the air that captures electrons most easily: most of the ions formed are therefore O2⁻ ions, all the more so as the electrons produced by our ionizers are low-energy.

TEQOYA ionizers do not release positive ions: these remain confined to the plasma zone and are immediately neutralized by the metal tip of the needle.

Question 28

How does an ionizer work in a vehicle, without a ground connection?

Accepted Answer

The TEQOYA Nomad uses the vehicle's electrical ground, to which it is connected through the USB or 12 V socket. It does not need a grounded outlet.

The particles charged by the negative ions are drawn to the surfaces connected to the vehicle's ground. The electric charges are then dissipated by the friction of the air on the bodywork and by the tires' contact with the road: tires are insulators, but they let through the very weak currents produced by the ionizer, which are below one microampere.

The TEQOYA Nomad therefore purifies the air in the passenger compartment effectively. In a laboratory test on a vehicle fitted with an F9-class cabin filter, it removed 90% of ultrafine particles in 250 seconds (tests and certifications).

Question 29

How do I use the TEQOYA Nomad in my car?

Accepted Answer

Plug the TEQOYA Nomad into a USB socket or a 12 V socket (cigarette lighter) in your vehicle, using the cable supplied: it switches on as soon as the socket is powered. The indicator light shows that it is working.

To benefit from it quickly, place it as close to you as possible; most of our users put it near the socket on the dashboard. If you drive with the window open for the whole trip, you can unplug it for that trip.

The Nomad can also purify the air in a camper van or, plugged into a USB port, the air close to you in a small room.

Question 30

Do TEQOYA devices need a grounded outlet?

Accepted Answer

No, not a grounded outlet in the sense of the electrical installation. An ionizer needs a “return to ground” to dissipate the charges it emits. TEQOYA devices get it through the neutral wire of the power grid, which is itself connected to ground at the electricity supplier's transformer.

This design ensures they work even in homes whose outlets are not grounded, which is common. Connecting the device to a household ground does not improve how it works.

For the same reason, a TEQOYA ionizer cannot run on a simple isolated battery. In a car, the TEQOYA Nomad uses the vehicle's ground.

Question 31

Are TEQOYA air purifiers safe?

Accepted Answer

Yes. Their safety has been verified by independent laboratories (tests and certifications):

no ozone emissions, according to the standard CE marking test and after more than 12 hours in a sealed chamber;
no effect on the overall oxidative potential of the air (EPR method);
no chemical transformation of the VOCs present in the air.

Their electrical power is very low, and so is their electromagnetic radiation. The maximum current they can produce is a thousand times lower than the threshold considered dangerous to health (1 mA). They comply with CE requirements for electrical safety and electromagnetic compatibility.

Negative ions are naturally present in the air, sometimes in high concentrations (forests, waterfalls, seaside). Several scientific reviews have found no harmful effects of negative ions on health, for example Jiang et al., International Journal of Molecular Sciences, 2018.

Question 32

What proves that TEQOYA air purifiers are harmless?

Accepted Answer

The reports from independent laboratories, which we publish. TEQOYA designs its air purifiers to clean the air without emitting any pollutants (ozone, nitrogen oxides, VOCs, fine particles), then has their performance and safety verified by independent laboratories in France and abroad (CERTAM, Intertek, Guangzhou Industrial Microbiology Testing Center).

These reports can be downloaded from our tests and certifications page. Before buying any air purifier, we recommend checking that such reports exist.

Question 33

Are the particles an ionizer deposits on surfaces dangerous?

Accepted Answer

No. The particles charged by a TEQOYA ionizer stay stuck to surfaces by electrostatic attraction. They do not behave like dust: they only come off through mechanical action (rubbing, wet cleaning, powerful vacuuming), and are not stirred back into the air by a simple draft or when you walk.

The harm caused by fine particles comes mainly from inhaling them: we breathe about 12,000 liters of air a day, and the finest particles penetrate deep into the lungs, then into the bloodstream. Once deposited on the floor and mixed with all the other household dust, these same particles represent a tiny fraction of what comes into contact with our skin, and the available studies indicate that they penetrate the skin far less than the lungs.

A particle on the floor is a particle you do not breathe. Simply clean the surfaces as part of your usual housework, especially near the device.

Question 34

Are TEQOYA air purifiers safe for children and pets?

Accepted Answer

Yes. TEQOYA air purifiers emit no ozone or other toxic substances, and the maximum current they can produce is a thousand times lower than the threshold considered dangerous (1 mA). They can be used in a child's bedroom or a room where pets live.

A few precautions for use:

Place the ionizer at a height of 50 cm to 2 m, preferably out of reach of young children. This is not a question of danger: on the floor, it is less effective and may be knocked over.
Bringing a finger close to a needle can produce a very slight electric sensation, which is harmless.
Particles deposited on the floor do not go back into the air; regular cleaning is enough.

The ionizers, with no fan, are silent and do not blow air.

Question 35

Are air ionizers safe to sleep with? Can a high ion concentration be harmful?

Accepted Answer

Yes, you can sleep near a TEQOYA ionizer. Air is naturally ionized, and strongly so in some natural environments: forests, the seaside, waterfalls, mountains. In a room equipped with a TEQOYA ionizer, the average ion concentration (around 5,000 to 10,000 ions/cm³ for a T200 in 15 m²) is of the same order as in these environments. The available studies have not shown any danger in living in air rich in negative ions.

TEQOYA ionizers emit no ozone and are silent, which makes them suitable for a bedroom. If you are electrosensitive, we recommend placing the device at least 1 m from where you spend long periods (bed, armchair, desk).

Question 36

I am electrosensitive: can I use a TEQOYA air purifier?

Accepted Answer

Yes. TEQOYA air purifiers have very low electrical power and therefore emit very little electromagnetic radiation. The low-frequency magnetic field is practically impossible to measure, because the current emitted by the needles is below one microampere.

As a precaution, we recommend that electrosensitive people place the device at least 1 m from the places they regularly occupy (bed, armchair, desk). If in doubt, ask a health professional for advice.

Question 37

Which TEQOYA air purifier model should I choose?

Accepted Answer

The choice depends on the room, how it is used and how much you mind particles settling on surfaces:

TEQOYA E500: e-filtration air purifier for living areas up to 30 m² (living room, kitchen). Pollutants are captured in a washable filter, with no deposits on surfaces. Its speed is adjustable.
TEQOYA T450: air ionizer for large, quiet rooms up to 30 m² (up to 50 m² if you are mainly looking for an atmosphere rich in negative ions).
TEQOYA T200: air ionizer for bedrooms and quiet offices up to 15 m² (up to 30 m² if you are mainly looking for an atmosphere rich in negative ions).
TEQOYA Nomad: air ionizer for the passenger compartment of a vehicle.

If you are looking for the quietest solution and the one closest to a natural phenomenon, choose an ionizer. If you want to avoid any deposits on surfaces, or if you are sensitive to allergens or cooking odors, go for the TEQOYA E500.

Question 38

Where should I place my TEQOYA air purifier for maximum effectiveness?

Accepted Answer

In as open a space as possible, so that the ions or the air can circulate freely throughout the room. Avoid corners and spots surrounded by objects or furniture.

For an ionizer (T200, T450):

place it at least 30 cm from walls and partitions, for effectiveness and to limit marks on these surfaces;
put the T200 at a height of between 50 cm and 2 m;
keep it away from metal objects and electrical appliances, which attract the ion flow;
choose a spot that is easy to clean, as particles settle on nearby surfaces.

For the TEQOYA E500: do not block the air inlet, at the bottom, or the outlet grille. If it stands on a surface, use the wooden feet supplied. It can also be wall-mounted.

If you know the source of pollution (kitchen, fireplace...), place your air purifier close to it.

Question 39

Why do marks appear on the walls near my ionizer, and how can I prevent them?

Accepted Answer

They are particles removed from the air. The ionizer charges the particles; most are drawn to the floor, but a fraction settles on nearby walls and furniture. Depending on the pollution level and the type of surface, a darker halo may gradually appear.

To limit them:

place the ionizer at least 30 cm from walls, and away from metal or electrical objects;
choose a spot that is easy to clean, and avoid surfaces that are hard to wash;
regularly wipe nearby surfaces with a cloth; if stains have set in, use a melamine sponge and a wall cleaner;
you can also place a rounded object, or one shaped like an open book, between the ionizer and the wall, with the ionizer in the middle: this lengthens the particles' path. On the other hand, avoid a flat object leaning against the wall, which increases deposits in the gap.

If you want no deposits at all, the TEQOYA E500 captures particles in its filter.

Question 40

What maintenance does my TEQOYA air purifier need?

Accepted Answer

Very little: all you need to do is clean the ion optics once or twice a year (and the filter in the case of the TEQOYA E500).

Ion optics (all models): over time, a thin layer of white dust builds up on the tips of the needles, at the bottom of each cone, and reduces ion output. To remove it, use the silicone eraser from the TEQOYA cleaning kit. Otherwise, make a point with a folded dry towel, push it into each cone and twist it. The needles are not fragile: the way they are mounted prevents them from being bent or pulled out.

TEQOYA E500 filter: clean it every 6 months to 1 year depending on the pollution level, with the brush supplied. It is reusable: there is never a filter to buy again.

Surfaces near an ionizer: dust them as part of your usual housework.

Question 41

How many hours a day should I run my TEQOYA air purifier? Can it run all the time?

Accepted Answer

We recommend leaving it running all the time (24/7). TEQOYA air purifiers are designed for this: they use very little energy, have no disposable filter that wears out, and come with a 5- to 10-year warranty for continuous operation.

Pollution constantly enters and builds up again in a home: continuous operation keeps the air clean without you having to remember to switch the device back on. Cleaning once or twice a year is enough to keep it effective.

Question 42

Should I turn off my TEQOYA air purifier when I am away for several days?

Accepted Answer

There is no need: TEQOYA air purifiers use very little energy and are designed to run all the time, so you can safely leave them on while you are away. That way, you will not come back to air loaded with pollutants.

This is particularly useful if you use your air purifier for health reasons, or if pets stay indoors.

If you prefer to switch it off during a long absence, as with any electrical appliance, just remember to switch it back on when you return.

Question 43

Can I move my TEQOYA air purifier from one room to another?

Accepted Answer

Yes. TEQOYA air purifiers are light and compact, so you can easily move them as needed: the living room during the day and the bedroom at night, for example. Simply follow the placement advice in each new location. Remember to move the device into your bedroom about 1 hour before you go to bed, so you can enjoy healthier air right away.

For permanently purified air in several rooms, however, it is better to equip each room where you spend time, starting with the bedroom.

Question 44

Are TEQOYA air purifiers noisy?

Accepted Answer

TEQOYA ionizers (T200, T450, Nomad) are silent: with no fan or motor, they cannot be heard at a normal distance. Very close up, with your ear against an ion optic, you may hear a slight crackling, a sign that they are working.

The TEQOYA E500 has a low-noise fan: from 30 to 50 dB depending on speed, or from 20 to 35 dB with the silent cap.

Question 45

How do I set up my TEQOYA air purifier?

Accepted Answer

It is very simple. Remove the plastic packaging, then:

Ionizer (T200, T450): plug it in, and that's it! It starts working immediately, with no settings to adjust or filter to install.
TEQOYA E500: plug it in, press and hold its single button to start it, then press briefly to adjust the speed. Just one button: it couldn't be easier!
TEQOYA Nomad: plug it into a USB or 12 V socket in your vehicle.

Question 46

Are TEQOYA air purifiers compatible with a humidifier?

Accepted Answer

Yes, with no contraindication. Using a TEQOYA air purifier together with a humidifier reduces airborne pollutants while maintaining suitable humidity.

For a healthy environment, keep relative humidity between 40% and 60%: above that, mold and dust mites thrive.

Question 47

Can I use an essential oil diffuser with a TEQOYA air purifier?

Accepted Answer

Yes, but the air purifier partly reduces the diffuser's effect. A diffuser emits microdroplets of essential oils, which the air purifier removes from the air like other particles. The fragrant compounds that evaporate into a gas are not removed.

While the diffuser is running, it emits a lot of aerosol in a short time and the reduction remains small. Once the diffuser is switched off, the microdroplets disappear from the air much faster with the air purifier than without it.

Use good-quality essential oils, in moderate amounts.

Question 48

Can I use a TEQOYA air purifier in a camper van?

Accepted Answer

Yes. The light, portable TEQOYA Nomad is designed for vehicles: it is powered through a USB or 12 V socket, which camper vans have. It reduces particles and particle-borne odors (smoke, cooking) inside the vehicle.

If your camper van has 230 V outlets, you can also use a TEQOYA T200, with the power adapter supplied.

Question 49

Why purify indoor air continuously?

Accepted Answer

Because it is indoors that we breathe most of the pollution we are exposed to. We spend around 90% of our time in enclosed spaces, where the air can be up to 5 times more polluted than outdoors. Indoor pollution is constantly renewed: cooking, dust, dust mites, mold, and outdoor pollution coming in through openings.

For children too, exposure happens mainly indoors: a study of 96 nine-year-old schoolchildren in Paris showed that home and school accounted for more than 85% of their exposure to ultrafine particles, with the highest peaks measured at home, especially during cooking (Paunescu et al., Indoor Air, 2017).

The bedroom is the first room to equip: we spend 6 to 8 hours a day there.

A TEQOYA air purifier running continuously (24/7) removes up to 99% of particles from the air, including pollen, dust mite allergens, mold spores and tobacco smoke.

Question 50

Should I keep windows and doors closed for my TEQOYA air purifier to be effective?

Accepted Answer

No, keep airing out your home. Open your windows for at least 10 minutes, early in the morning and in the evening, to let out CO2, humidity and gases such as VOCs. When you air out, you also let in outdoor pollution, especially PM2.5: your TEQOYA air purifier then removes it from the air, along with the other indoor particles (mold spores, dust mite allergens...).

An air purifier is more effective in a room that is not permanently open to other sources of pollution. However, keep enough fresh air coming in to avoid stuffiness and humidity; the air purifier will make up for the outdoor pollution that comes in.

Question 51

Can a TEQOYA air purifier replace airing out the room?

Accepted Answer

No. A TEQOYA air purifier removes particles from the air, but not CO2, humidity or VOCs. It is still essential to air out your rooms every day, for at least 10 minutes morning and evening.

Question 52

Why isn't airing out enough to purify indoor air?

Accepted Answer

Because airing out renews the air without filtering it. It lets out CO2, humidity and VOCs, but many indoor pollutants, such as fine particles, mold spores and dust mite allergens, are emitted continuously and remain airborne for hours. A few hours are often enough for the pollutants driven out by opening the window to come back.

Moreover, airing out lets in outdoor pollution, all the more so as the air exchange rate is high. As our ventilation systems rarely filter the air, we often inhale more atmospheric pollutants indoors than outdoors, because of the time we spend there.

An air purifier therefore complements airing out. TEQOYA ionizers remove particles from the air in the room; the TEQOYA E500 captures them in its reusable filter.

Question 53

I live in the countryside: do I really need an air purifier?

Accepted Answer

Not necessarily, but country air is not always healthy. Intensive farming, livestock, nearby roads or airports, and pollutants carried over long distances can degrade air quality, even in rural areas. Pollen is often abundant there, and indoor air can also contain mold spores or pet dander.

Start by finding out about the air quality near you, for example with our free air quality report. If the data are good and you feel no discomfort related to the air, you probably do not need an air purifier. If you are sensitive to pollen or allergens, a TEQOYA air purifier can improve your indoor air.

Question 54

My environment has no pollutants: is a TEQOYA air purifier useful?

Accepted Answer

Perhaps. Even without visible pollution or odors, the air can contain fine particles and allergens. Research is gradually showing that even low concentrations of pollutants, which are hard to measure, have an effect on health.

The best way to find out is to measure: an air quality monitor tells you the particle level in your home. If you are sensitive to allergens or odors, an air purifier such as the TEQOYA E500 reduces their concentration in the air thanks to its reusable filter.

Question 55

How can I be sure the room is properly purified?

Accepted Answer

By measuring. An air quality monitor measures the particle level before and after you switch on the TEQOYA air purifier. TEQOYA offers the S1 Sensor, on free loan for one month when you buy an air purifier, or for purchase to monitor your indoor air continuously.

The sensor also measures relative humidity and CO2, which tells you whether your home is sufficiently ventilated.

To keep it working at its best over time, follow the use and maintenance instructions in the user manual.

Question 56

How can I tell if my TEQOYA ionizer is working properly?

Accepted Answer

It is normal not to notice anything: at a normal distance, a TEQOYA ionizer makes no noise, gives off no odor and does not blow air. To check it, do one of these three tests, which are completely safe:

Hold your hand near the ion optics: you will feel a slight cool breeze, the “ionic wind” created by the flow of ions.
Bring your ear close to an ion optic: you will hear a slight crackling.
Slowly bring a finger to within 1 or 2 mm of the needle, at the bottom of an ion optic: you will hear the same crackling, more distinctly. In the dark, a faint glow may appear at the tip of the needle.

If you do not hear any crackling, your body may be insulated from the ground by the soles of your shoes. Touch a wall with one hand or take off your shoes, then try again.

To go further, an air quality monitor measures the ionizer's effect on particles. TEQOYA offers them for sale or on loan.

Question 57

How can I check that my TEQOYA E500 air purifier is working properly?

Accepted Answer

Four simple checks:

The sound: the TEQOYA E500 makes a slight fan noise, a sign that the air is being drawn in and treated.
The indicator light: it is on when the device is running.
The ion optics: if they are dirty, ion output, and therefore effectiveness, decreases. Clean them once or twice a year with the kit supplied, a job that takes just a few minutes.
The air quality: a monitor, such as the one offered by TEQOYA, measures the air purifier's effect. This is the most reliable way.

The E500 works discreetly, with no disposable filter and no odor: just because you cannot see anything does not mean nothing is happening.

Question 58

Some needles on my TEQOYA ionizer don't crackle: is it faulty?

Accepted Answer

No, this is normal. The ion optics are not independent: when one emits strongly, its neighbors emit less, because the local electric charges slow them down. The most active optics change over time. What matters is the device's total ion output, which we check during production.

The sound can also vary with the local humidity of the air or how close your body is.

If the crackling decreases across the whole device, the needles probably need cleaning: the ultrafine dust that builds up on their tips gradually reduces ion output.

Question 59

My ionizer makes an unusual whistling sound: is this normal?

Accepted Answer

A slight crackling is normal. An unusual whistling generally has one of two causes:

Dust in the ion optics: clean them by following the maintenance question. If the whistling persists, contact our customer service at contact@teqoya.com for a repair or replacement.
Very high air humidity (over 90%): the whistling stops when the humidity drops. Such humid air encourages mold; a dehumidifier may help. You can also switch off the ionizer until the humidity drops.

Question 60

My TEQOYA air purifier was dropped or got wet: what should I do?

Accepted Answer

If it was dropped: TEQOYA air purifiers are sturdy, so yours is probably still working. Check it with the tests in the question “How can I tell if my TEQOYA ionizer is working properly?”.

If it got wet: unplug it immediately and leave it to dry until the next day. Then plug it back in and check that it works.

If in doubt, contact our customer service.

Question 61

I felt a small electric shock near my ionizer: is it dangerous?

Accepted Answer

No. A very slight shock, similar to the one you feel when touching a car body but weaker, can occur in two cases:

when you bring a finger close to a needle, at the bottom of an ion optic: a tiny, very low-intensity electric arc forms;
when your body is insulated from the ground (insulating soles, no contact with a wall or furniture) and becomes slightly charged near the ionizer: the charge is released when you touch a metal object or another person.

Metal objects placed on an insulating surface near the ionizer can also build up charges. Move the ionizer away from these objects.

None of these phenomena is dangerous or a sign of a malfunction.

Question 62

How long will it take to receive my order?

Accepted Answer

Usually 5 business days, with DPD or Colissimo, to your home or to a pickup point. Your order is shipped within 48 hours, and you receive a shipping confirmation no later than 72 hours after placing your order. If exceptional circumstances extend this time, we will say so on the website.

Question 63

What warranty do TEQOYA air purifiers come with?

Accepted Answer

The manufacturer's warranty is 10 years for the TEQOYA T200 and T450 ionizers, and 5 years for the TEQOYA E500 and the TEQOYA Nomad. It covers parts and labor, for use in accordance with the user guide. We repair or replace the defective product free of charge. Every device is manufactured, calibrated and tested in our factory in France, and our after-sales service supports you throughout the warranty period.

In particular, it does not cover: damage from external causes (impact, fall, lightning, power surge, excessive humidity), failure to follow the use and maintenance instructions, modifications to the device, or devices left in a vehicle at temperatures outside the range of -20 °C to 50 °C.

In the event of a breakdown, email us at contact@teqoya.com with your order number. These terms are in addition to your statutory rights (legal guarantee of conformity).

Your questions about TEQOYA air purifiers and ionizers

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