The Cleanliness Classification of Ventilation Products

M1 Cleanliness Classification of Ventilation Products has helped Finns to achieve fresh incoming air for more than 20 years. The M1 Cleanliness Classification, introduced in 2001, was created to promote the development and use of clean and odourless ventilation products.

What is M1 Cleanliness Classification?

M1 Cleanliness Classification of Ventilation Products has helped Finns to achieve fresh incoming air for more than 20 years. The M1 Cleanliness Classification, introduced in 2001, was created to promote the development and use of clean and odourless ventilation products.  

A good indoor environment requires consideration of indoor air issues in all stages of planning, construction and use. Part of this process is clean ventilation products that help achieve good indoor air quality. Read more about the M1 Cleanliness Classification here.

Benefits of the Classification

Clean, Odorless Ventilation Products for Healthy Indoor Air

• Supports Healthy Indoor Air – M1-certified ventilation systems are designed to maintain and enhance indoor air quality.

• No Harmful Emissions – The M1 classification helps to ensure the system does not release gases or particles that compromise air quality.

• Odor-Free Performance – M1-certified products do not introduce unpleasant smells into your indoor environment.

• Easy to Maintain – Designed for effortless cleaning, helping you keep the air fresh and healthy at all times.

The classification system is based on multidisciplinary expertise and impartiality

The Cleanliness Classification of Ventilation Products is owned by Rakennustietosäätiö RTS sr and operated by Rakennustietosäätiö RTS’s subsidiary Rakennustieto Oy. The classification is overseen and developed by the principal committee Indoor Environment (PT 41) appointed by Rakennustietosäätiö RTS sr, in which representatives include construction products industry, developers, designers,and research institutes. Classification applications and matters related to classification decisions are handled confidentially by a separate impartial classification committee. The classification decisions are based on the document Classification of Indoor Environment 2018 (Sisäilmastoluokitus 2018), the general rules of the classification and the classification criteria.

The Cleanliness Classification of Ventilation Products is part of the Classification of Indoor Environment

The voluntary Cleanliness Classification of Ventilation Products is part of the broader Classification of Indoor Environment (Sisäilmastoluokitus) developed by the Finnish Society of Indoor Air Quality and Climate and Rakennustietosäätiö RTS sr.  

The Classification of Indoor Environment was published for the first time in 1995 and has since been updated in 2001, 2008 and 2018. The Classification of Indoor Environment is used by architects, designers, contractors, and manufacturers when building healthier and more comfortable buildings.