The structure of the Finnish classification system is designed to help all parties in the construction process in the assurance of good IAQ. Included are target value specifications, design guidelines, quality assurance procedures and requirements for building products. The main features in the updated document are revised target and design values; modified instructions on how to achieve cleanliness at building site; a requirement for a moisture control plan; and new criteria for the cleanliness of ventilation systems and components. This paper describes the structure of the updated classification document; and the revised target values for thermal comfort, IAQ and HVAC noise
