Requirements and Interactions for Indoor Environmental Quality (IEQ) Parameters

For design and energy perfomance prediction of buildings and HVAC systems, it is important to use established requirements for Indoor Environmental Quality parameters. The indoor environmental factors are Therman Comfort, Indoor Air Quality (IAQ, ventilation), Lighting and Acoustic, where especially Thermal Comfort an IAQ have significant influence on people's health and well-being, and on energy use. A couple of international standards deals with requirements to the indoor environment. Newly published ISO standards, ISO 17772-1/2, and newly published CEN standard EN 16798-1/2 deals with all 4 indoor environmental factors, while ASHRAE Standard 55 deal with Therman Comfort and Standards 62.1 and 62.2, deals with IAQ/Ventilation. The requirements are however, given without taking into account any interactions between parameters. ASHRAE Guideline 10 "Interaction Affecting the Achievement of Acceptable Indoor Environments" do give some explanations related to such interactions.