Performances tested in research laboratories

Objectives of the tests:

  • Assess performance of TEQOYA ioniser 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 ionisers produce (ozone O3 and nitrogen oxides NOx)

Tests conditions:

  • TEQOYA ioniser was tested in a large room of 30m2 surface (80 m3 volume); complementary tests were run in a smaller room of 13m2 surface (32.5 m3 volume) to evaluate consistency of overall results.
  • Controlled emission of particles was done with cigarette smoke, because it is representative in terms of 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 was detected during Teqoya ioniser operation: ozone density was similar and measured below 4.5 μg/cm3 with or without ioniser during experiments (except during cigarette combustion time).

Very significant particles removal performance, even in a large room (30m2).

On the below chart, a cigarette is burnt in the room. Then the ioniser is started. The measure of particles density is done at a 2m. distance from the ioniser (roughly). As soon as the ioniser is started, particles decay accelerates. In various tests conditions, decay acceleration (compared to reference case without air purifier) is 70% to 150%.

Very significant particles removal performance

In another test, ioniser was started before cigarette combustion. This case is closer to normal condition, since a ioniser should never been stopped (its very low power consumption as well as absence of noise enables such a usage, and it is recommended to ensure continuous air cleaning). Below chart illustrates that the ionised air decreases pollution peak and accelerates air purification.

Very significant particles removal performance

Tests run in the smaller room displayed proportionally faster particles decay speed, and similar efficiency.

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

Equal efficiency on a wide spectrum of particles size

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

Background particles density strongly reduced

Previous to CERTAM tests campaign, other measurements were done which confirm above results.

Tests were performed in a swiss public lab to prove that toxic by-products levels are very low, even very close from the ioniser needles (1cm and 10cm). Difference between ozone level and nitrogen dioxide level with or without ioniser is of the same order as the measurement uncertainty (2 ppb), meaning that the variation is below the measurement apparatus accuracy.

CERTAM results confirm tests previously performed

Tests were performed by APAVE (private testing and measurement laboratory) in a french hospital to assess the impact of the ioniser on the density of particles in a surgical operation room (class 100). Measured particle size is 0.5 μm. Particles density reduction with the ioniser is 70%.

APAVE tests in operating room show performances

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