Classification of Indoor Climate 2008 (abbreviation used in Finland: SL 2008) Literature reference: Classification of Indoor Environment 2008. Target Values, Design Guidance, and Product Requirements. Finnish Society of Indoor Air Quality and Climate. FiSIAQ publication 5. Trinklet Oy. Helsinki 2010. (The document can be found in electronic form in Moodle) 12.4.2018 Marianna luoma

History of the Classification The first Classification of Indoor Climate, Construction, and Finishing Materials was published in 1995 Classification of Indoor Climate 2000 Classification of Indoor Climate 2008 The Finnish organizations behind the classification are: www.sisailmayhdistys.fi (The Finnish Society of Indoor air Quality and Climate) www.rts.fi (Building Information Foundation RTS)

The use of the Classification The Classification supplements the National Building Code of Finland The Classification does not overrule the official building codes Used mainly in new constructions Gives target and design values for better indoor climate Can be used by the building owners, designers, equipment manufacturers, contractors, and maintenance personnel Can be used as an appendix of specifications of construction and mechanical systems of new buildings

The goals To design and construct healthier and more comfortable buildings and their mechanical systems Guidelines for manufacturing better air-handling equipment and building materials Gives target and design values for better indoor climate

The sturucture of the Classification of Indoor Environment

Procedure for using the classification in a building process The developer and the future building owner choose the target values for indoor climate The design team describes the technical solutions The construction cleanliness class and the cleanliness class of air-handling systems are chosen The emission class for building materials and cleanliness class of air-handling components are chosen All persons that are involved in the design and building process have to be aware of the goals and have to follow the practical guidelines that are given in the ”Classification of Indoor Environment 2008” It is assumed that by following the above mentioned procedure, the indoor climate in the new building will meet the the target values of the chosen indoor category S1, S2, or S3

Indoor climate categories There are three categories: S1, S2, and S3 The classification gives both a verbal description and technical target values for each category The target values are given for: thermal conditions acoustic conditions air quality illumination

Target values for thermal environment, S1

Target values for thermal environment, S2

Target values for thermal environment, S3

Target values for air velocity Category S1 (individual) S2 (good) S3 (satisfactory) Temperature 21 °C <0,14 m/s <0,17 m/s <0,2 m/s (winter) 23 °C <0,16 m/s <0,20 m/s 25 °C <0,18 m/s <0,25 m/s <0,3 m/s (summer)

Target values for indoor air quality CO2-concentration, ppm <750 <900 <1200 Radon concentration, Bq/m3 <100 <200 Stability of the conditions -offices and schools 95% 90% -residencies 80%

2. Guidance for design and construction Construction cleanliness categories are called P1 and P2 The target values of S1 and S2 indoor climate categories are generally achieved by applying P1 for construction work and air-handling system, and by using M1-class building materials. M1-classified building materials are low emitting materials. Water and moisture control plan of the construction site is needed Information about the indoor climate classification is given for all participants of the building process and training sessions for the workers are arranged

Air-tightness of the building envelope Recommended value for the single family houses n50 < 1,0…2,0 1/h Recommended value for other buildings n50 < 0,5…0,7 1/h

Design values for outdoor air flow rates, examples… Dwellings, dm3/s,person 12 8 6 Offices, dm3/s,person 16 13 1,5 dm3/s, m2 Meeting rooms, dm3/s,person 9 There are more values for different buildings and rooms

The cleanliness classification of air-handling systems: The requirements of cleanliness category P1 The supply air ducts and fittings shall be manufactured using cleanliness class M1 air-handling components The sealing materials are selected from emission class M1 or M2 building materials The average amount of dust on the inner surface of a new air-handling system shall not exceed 0,7 g/m2 (measured or visually estimated) Return air is not used in the air-handling system The supply air filter fulfills the requirements of European Class F8/EU 8 and a pre-filter is used

The requirements of cleanliness category P2 The supply air ducts and fittings shall be manufactured using cleanliness class M1 air-handling components The average amount of dust on the inner surface of a new air-handling system shall not exceed 2,5 g/m2 Return air is not used in the air-handling system The supply air filter fulfills the requirements of European Class F7/EU 7 and a pre-filter is used

Storage and installation of air-handling components The protective covers of the components shall be removed only just before installation Dirt shall not accumulate into the air-handling system during installation Burrs, screws or other items shall be removed from the inner surfaces of ducts The use of excessive amount of sealants shall be avoided All the open ends of the ductwork shall be capped during the breaks of the installation work The ducts shall be airtight The proper functionng of the service and access doors shall be checked

Burrs in ducts are avoided by using an electric cutter Protection during storage Protection Protection during installation

3. Requirements for building products The goal is to increase the development and usage of low-emitting construction materials … and better indoor climate Requirements are given for emission class of M1 and M2 Upper limit values for emissions of TVOC, formaldehyde, ammonia, carcinogenic compounds, no odours, no casein For example, indoor climate category S1 air quality requirements are usually not fulfilled by using unclassified construction materials or air-handling components

Cleanliness classification of air-handling components The aim is to ensure good quality of the supply air One cleanliness category: classified or not The requirements are fulfilled if, after manufacturing, the components satisfies the component group specific requirements Ducts and fittings, air and fire dampers Criteria for surface density of oil in ducts, mineral fibres released into air, and surface density of dust Classification includes ducts, air and fire dampers, supply filters and sound attenuators

Indoor air quality in a new building Usually, the indoor air quality of the new building is good, if the guidance for design and construction is used and emission tested building materials and classified air-handling components are used Besides, the air flow rates have to be designed according to the design values given Measurement of indoor air quality is usually not necessary.

Factors suitable in maintenance agreements: Air temperature Air velocity Design flow rate Sound level of heating and air-handling equipment Acoustic conditions Radon concentration CO2 concentration Illumination

Think, how each group benefits from the Classification of Indoor Environment? Constructor? Designer? Air-handling constructor? Manufacturers? Users of the building? Employer? Maintenance personnel? HVAC-industry in general?