Testing and classification criteria - The Cleanliness Classification of Ventilation Products

Laboratory testing

Before applying for a Cleanliness Classification of Ventilation Products, the productshall be tested in a laboratory approved by Rakennustieto according to the testing protocol for ventilation products  (currently available only in Finnish). All practical matters related to the testing are agreed between the applicant and the testing laboratory. The applicant is responsible for the costs related to the testing and pays them directly to the testing facility.

If the testing protocol does not cover the testing of a particular product type, the classification committee will decide how the product shall be tested. If the testing of a product type has not been addressed in the testing protocol or questions arise about the testing, the Product Manager of the Cleanliness Classification shall be contacted before testing. If the testing has not been carried out according to the classification committee’s decision and the testing protocol,the classification cannot be granted based on the testing and new testing is required.

Tested parameters and classification criteria

The properties to be tested and criteria for the classification are determined by the product type. Product type-specific testing and classification requirements can be found in the section Downloadable materials.

Authorised testing laboratories

In the list below you will findall laboratories Rakennustieto has approved to carry out tests for the M1 Classification.  Please note that testing alone does not entitle a company to market a product as M1-classified. Only Rakennustieto can grant a product the M1 Classification.

Sheet metal ventilation ducts and duct parts as well as closing, adjusting and fire dampers

University of Eastern Finland

Department of Environmental and Biological Sciences
Antti Väisänen
+358 50 467 0622


Postal address: P.O. Box 1627, 70211 Kuopio, Finland

Emission measurements (e.g. for polymer ducts, silencers, and textile terminal devices)

Eurofins Expert Services Oy

Hanna Kajander
+358 40 829 4627


Postal address: P.O. Box 47, 02151 Espoo, Finland
Visiting address: Kivimiehentie 4, 02150 Espoo, Finland

Fibre measurements for silencers

Eurofins Expert Services Oy

Pekka Kettunen
+358 40 159 6471 


Postal address: P.O. Box 47, 02151 Espoo, Finland
Visiting address: Tekniikantie 4B, 02150 Espoo, Finland