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The “PLUS”: Tested for Ambient Air Hygiene by TÜV-Nord
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The “PLUS”: Tested for Ambient Air Hygiene by TÜV-Nord

Therapy Air® Plus: Ambient Air Hygiene Testing

Test results from TÜV NORD Systems GmbH & Co. KG, Essen, Germany

99% PURIFIED AIR EVERYWHERE

As of July 15, 2005, Therapy Air® Plus air purifier is the only device on the market featuring the TÜV NORD test certificate “Suitable for allergic people.” TÜV NORD Systems GmbH & Co. KG tested the air purifier between January and July 2005 before awarding it this certification.

The objective of the tests was to determine how well the device performed in purifying indoor air “in terms of respirable particulate matter, molds and allergens.” The ozone emission rate was also ascertained. The indoor area where the air purifier was tested, under conditions complying with regulations, had a volume of 52 cubic yards (40 cubic meters) of air.

Assessing the test results

The Therapy Air® Plus test shows that, while the device is in use, “none of the threshold values that trigger currently recognized medical and/or allergological reactions are reached, even in areas with a high degree of contamination from pathogenous materials contained in the air in the form of particles.”
“Based on the normal pollution levels in enclosed areas and the environment, i.e.

  • 20 to 100 μg particulate matter per m³ air,
  • 10 to 50 ng allergens per m³ air and
  • 100 to 500 KbE mold spores per m³ air,
    the air purifier that was tested achieved results, per m³ air, of
  • 1 μg particulate matter,
  • 1 ng allergens and
  • 10 KbE mold spores.”

Air turnover rate per hour and ozone emission rate

With an air volume of, e.g., 65 cubic yards (50 m³)—corresponding to a floor surface area of 24 square yards (20 m²)—the Therapy Air® Plus achieves the recommended air turnover rate of two changes of air per hour. The device's target specification for air quality and the reduction in airborne pollution is thus achieved after several changes of air.

The measured ozone emission rate of under 20 μg per hour achieves an ozone concentration in the air of 2 μg per m³ when the device operates continually. By comparison:
“this value is smaller by a factor of 10 than the threshold specified for awarding the ‘Blue Angel’ label for printers, copiers and multifunctional devices.”