Indoor air quality refers to the condition of the air within buildings and how it affects the people living or working inside. Unlike outdoor air, indoor environments are enclosed and can trap pollutants, which often become concentrated and potentially harmful over time. The role of the cleaning and restoration professional is not only to clean visible surfaces but also to recognise how their work can influence — positively or negatively — the quality of the air people breathe indoors.
In the context of restoration, IAQ becomes especially important. For example, water-damaged structures often harbour hidden mould growth, which can release spores and mycotoxins into the air. Fire-damaged homes may contain fine particulate matter and smoke residues that linger in the environment long after the flames are out. Even routine cleaning tasks can disturb dust, dander, and other allergens if not properly controlled.
Poor indoor air quality can cause a range of health symptoms — from mild irritations like headaches or dry eyes to more serious conditions such as asthma flare-ups or chronic fatigue. It also affects productivity, comfort, and the long-term condition of a property. Cleaners and restorers have a unique opportunity to contribute to healthier living environments by understanding and managing IAQ as part of their professional practice.
Key Factors Influencing IAQ Several interconnected factors determine the quality of indoor air:
· Pollutant Sources: The presence and strength of sources releasing contaminants into the air (e.g., building materials, combustion appliances, cleaning products, occupants, outdoor air intrusion).
· Ventilation: The rate at which outdoor air replaces indoor air, diluting and removing pollutants. This includes natural ventilation (windows, doors, infiltration) and mechanical ventilation (HVAC systems). Inadequate ventilation is a primary cause of poor IAQ.
· Humidity: Excessive moisture promotes the growth of biological contaminants like mould and dust mites , while very low humidity can cause irritation.
· Temperature: Primarily affects comfort but can influence the rate at which some pollutants are released (off-gassing).
· Air Filtration/Cleaning: The effectiveness of systems (like HVAC filters or portable air cleaners) in removing particles from the air.
