The informal Indoor Environmental Quality (IEQ) Gathering brings together European industry associations, which represent companies involved in technical building systems and their maintenance. Our objective is to collectively promote healthy buildings through an adequate level of indoor environmental quality. Healthy Buildings are buildings in which the indoor environment is healthy for people to live in and carry out their activities. An appropriate indoor air quality, a lighting design adapted to the needs of the occupants, sufficient access to daylight and views and an adequate mechanical or hybrid (natural ventilation assisted mechanically) ventilation are important for creating a healthy indoor environment. Thermal comfort, moisture, dust and pests, water quality, noise, as well as safety and security are aspects that must also be considered in the context of any healthy building.