Downloable Materials

Below you will find downloadable materials related to the M1 Cleanliness Classification of Ventilation Products.

0. Cleanliness Classification of Ventilation Products, General rules (published 12.10.2023)

0. Testing protocol for ventilation products (in Finnish, published 2012)

Protocol for the cleanliness classification of ventilation products (in Finnish, published 2025)

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Product type-specific testing and classification requirements:

• Ventilation ducts and parts as well as closing, adjusting and fire dampers (link)

• Air filters (link)

• Silencers (link)

• Ventilation terminals (link)