The Aattela Method makes it possible to determine the total indoor air toxicity of a building quickly, reliably and inexpensively.

Toxic pollutants collected from indoor air

A water sample collected from indoor air is tested, with the help of human macrophage cells, for the toxicity of indoor air.

Most of the toxic metabolites produced by microbes have a molar mass of 300 to 2,000 g/mol, i.e., they are non-volatile. In addition, they are mainly fat-soluble and move primarily by water vapour. The relative humidity of the air increases aerosolization.

Testing of breathing air

Indoor air quality must be tested directly from indoor air, to find out what kind of air a person is breathing. The general perception is that indoor air pollutants are particulate and gaseous substances.
Indoor air pollutants occur and enter the body in three different states: particles, gases and liquids.

Patented method

The world needs a reliable method of indoor air research. Is the indoor air in the building clean of toxic substances? Until now, buildings have only been designed to save energy, at the expense of human health.

This patented method is a Finnish innovation and is currently the only one in which toxicity is measured from indoor air, considering humidity and temperature.

Mirja Salkinoja-Salonen, Professor
Helsinki University, Finland

Companies in Finland using the Aattela Method