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Teqoya air purifiers efficiency: tested in labs

TEQOYA works with a lab expert in air quality to make sure about the performance of its products. Our purifiers use a physical phenomenon known as eliminating particles of all sizes: the ionization of the air. Here are the results of tests on clearance of particles by our devices.

Objectives of the tests:

  • Assess performance of TEQOYA ionizer in a room representative of real-life situations (most of the times air purifiers are assessed in testbed of smaller size than real-life rooms, and the electrical properties of their walls are not always representatives of materials used in buildings)
  • Measure both the particles removal performance, and the emission of potential toxic by-products some ionizers produce (ozone O 3 and nitrogen oxides NO x)

Tests conditions:

  • TEQOYA ionizers were tested in a large room of 30m 2 surface area (80m 3 volume). Complementary tests were run in a smaller room of 13m 2 surface area (32.5m 3 volume) to evaluate the consistency of overall results.
  • Controlled emission of particles was done with cigarette smoke, because it is representative of the size and components of urban pollution (cars, industry, indoor sources), and because the amount of particles emitted can be closely controlled.
  • The measurement apparatus is state-of-the-art (granulometer Dekati/ELPI and ozone analyzer SA/O342M).

Summary of results

No ozone emission

No ozone emission was detected during the Teqoya ionizer operation: ozone density was similar and measured below 4.5 μg/cm3 with or without ionizer during experiments (except during cigarette combustion time).

Very significant particles removal performance, even in a large room.

On the chart below, a cigarette is burnt in the room. The measure of particles density is done at a roughly 2m distance from the ionizer. As soon as the ionizer is turned on, particles decay accelerates. In various test conditions, particles decay acceleration is 70% to 150% higher than reference tests without air purifier.


In another test the ionizer was turned on before cigarette combustion. This test is closer to normal condition as the ionizer should never be turned off (its very low power consumption as well as the absence of noise allow continuous usewhich is recommended to insure continuous air cleansing). The chart below illustrates that ionised air decreases pollution peaks and accelerates air purification.


Tests run in the smaller room (13m2 surface area) showed a similar efficiency and a faster particles decay than without ionizer.

Equal efficiency on a wide spectrum of particles size, even the most toxic ones (100 nanom. and below).


After less than 3 hours of operation, the background particles density (without controlled particles emission) is reduced by 72% in a large (30 m2 surface area) and weakly polluted room.


Previous to CERTAM tests, other measurements made confirmed the above results.

Tests performed in a Swiss public laboratory proved that toxic by-products levels are very low even very close to the ionizer's needles (1cm and 10cm). The difference between ozone level and nitrogen dioxide level with or without ionizer is of the same order as the measurement uncertainty (2 ppb), meaning that the variation is below the measurement apparatus accuracy.


Tests were performed by APAVE (private testing and measurement laboratory) in a french hospital to assess the impact of the ionizer on the density of 0.5μm particles. The particles density reduction with the ionizer is 70% higher than without ionizer.



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