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, available in English and Finnish)

0. Testing protocol M1 Cleanliness Classification Testing Guideline for Ventilation Products (published 25.8.2025, available in English and in Finnish)
1. M1 Cleanliness Classification Guideline for Ventilation Products (published 25.8.2025, available in English and in Finnish)

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)