The good quality of indoor air is the sum of many factors. The quality of indoor air is considered to be good if the users of the facility are satisfied and the air causes no health hazards. Good indoor air requires the following:
• correct temperature
• sufficient ventilation
• no draught
• good acoustics
• correctly selected materials with low emissions
• cleanliness and ease of cleaning
• good condition of structures.
The quality of indoor air is also affected by the quality of outdoor air, cleaning agents, the fragrances and other chemicals used by the users of the space, animal dander, and cigarette smoke.
Some indoor air problems can be fixed by changing the ways the space is used or through building management measures, for example adjusting the supply air temperature. However, such measures are not enough if the hazards are caused by structural damage to the building or significant insufficiencies in ventilation.
Signs of moisture or an unusual smell in the indoor air, such as the smell of mould, may indicate structural damage.
Sources of unusual smells may also include sewers, furniture, or other materials. Stuffy air may also be caused by insufficient ventilation or an excessive room temperature.
The City has an established operating model for examining indoor air problems in buildings. The problems are being fought through multi-disciplinary cooperation.