All you need to know about indoor air While most people are aware of the importance of the outdoor environment, especially in relation to climate change but also to problems more directly related to our health, the effects of indoor environmental quality are not that common knowledge. Indoor air quality is an important part of indoor environment. The other factors, thermal quality, acoustical or sound quality and visual or lighting quality, can also play an important role in how you experience the indoor environment as a whole. This guide provides you with information on what indoor air quality is and what it can do, in order to make you aware of your own home indoor environment.