Tested, verified and safe air purification technology
It does not make any difference what kind of indoor air cleaner you find in your home or workplace. Not all cleaners produce pure air, but as a by-product they create new indoor air risks. Check out our test results for our technology for pure indoor air.
All our air purifier models use the same three-stage filtration technology. Pre-filter, activated carbon filter and EPA / HEPA filter ensure first-class cleaning performance. The difference between our different cleaner models is not only the appearance, but the size for which the cleaner is designed.
The filtering technology we use is proven to be completely safe.
Our technology has been tested and proven effective in both laboratory and field studies by the VTT Technical Research Center of Finland, the National Institute for Occupational Health TTL and the National Institute for Health and Welfare THL. Unlike many other technologies, UniqAir does not generate cleaning by-products. Typical air purifiers that increase the risk of indoor air are UV, electrical, plasma, and ionization equipment that generate ozone or harmful modified compounds as a by-product.
What is decisive in cleaning performance?
The most important factor describing the efficiency of an air purifier is the resolution. It is described as a percentage, which is the percentage of impurity that binds to a filter once air passes through it once.
Better resolution results in the decisive filtration property, i.e. the rate at which the impurity content of the space is reduced.
Poor resolution is characteristic of inefficient or slow cleaners that do not handle high levels of impurities. They need larger amounts of air, that is, several cycles of recirculation, to reach even a reasonable level of purity. A large amount of air, on the other hand, leads to a disturbing rise in the sound level and a feeling of draft.
High resolution and therefore fast purifiers reach decisively lower impurity levels with less air recirculation. Clean indoor air is produced at a lower sound level and without a sense of draft.
See more detailed test results for particle separation >>
Laboratory measurements of UniqAir technology
The technology we use has been tested under laboratory conditions. In the VTT test design, the condition was isolated from external factors. All air to be cleaned passed through the purifier.
The flow rate method used to measure the particle separation rate was based on the European Filter Measurement Standard EN 779. The degree of particle separation was determined with liquid DEHS (di-ethyl-Hexyl-sebacate) particles and measuring the concentration of test particles at the inlet and outlet sides of the device. The yield of clean air was calculated as the product of air volume and particle separation rate.
The production of clean air for gaseous impurities was determined by the reduction method using the American air purifier measurement standard ANSI / AHAM AC-1-2015 using toluene as a test substance at an initial concentration of 1 ppm (parts per million).
In the results, the reduction of gaseous impurities was 100% and the degree of particle separation ranged from 98.6 to 100% depending on the particle size when using an E11 class particle filter. The graph below shows a decrease in the toluene concentration over an hour (1 h).
Change in toluene content per hour
Test result under actual operating conditions
The actual environment differs from the lab's closed conditions, which is why we have tested our filtration technology under real operating conditions in combination with TTL and THL.
In the real world, more and more contamination is generated from the surrounding materials, moisture damage microbes, traffic and other environmental factors. It is essential for the purification capacity that the impurity binds to the filters with the best possible resolution, which results in a rapid reduction of the impurity and a permanently lower impurity content.
As a field test, we conducted a test measurement of volatile organic compounds (VOC) filtration in an office environment in conjunction with TTL. The measurement site was an office room of approximately 25 m2. Prior to the use of the purifier, the test bureau's TVOC concentration was 130 µg / m3 and the use of the purifier dropped to <10 µg / m3.
See more detailed results of the field test >>
In addition, in conjunction with VTT, we measured the air pollution or NOx filtering capacity of our filtration technology under field conditions. The test site was the office wing of Helsinki Central Station next to the bus stops. The measurement curve below shows an immediate decrease in NO2 concentration each time the purifier was on. Immediately after switching off the purifier, the NO2 concentration returned to its initial concentration.
The air purifier had a direct impact on indoor air quality along a busy road.
24-hour NO2 field test in Helsinki
In Helsinki, the average indoor concentration of NO2 is 30 µg / m3. The annual limit value is 40 µg / m3 and the hourly limit value is 200 µg / m3. The hourly limit may be exceeded only 18 hours per year. Thus, Helsinki values approach the annual limit values, but are still well below the hourly limit values. By comparison, a study by King's College in London in 2016 found that the annual limit values were exceeded in 59 of the 97 areas studied. The same is true of growth centers around the world. The picture below shows the 10 worst areas in London.