Ventilation strategies for good indoor air quality and energy efficiency

ten associated with a statistically significant increase in the prevalence of one or more SBS symptoms One the other hand energy is used for ventilation. The share of heating ventilation air from the energy delivered for space conditioning of residential and service build-ings is roughly 33 %. Thus proper ventilation methods are important for the total energy efficiency of buildings. Good indoor air quality and energy efficiency are of-ten seen as conflicting requirements. This is not at all a necessity. There are several ways to obtain significant savings in energy consumption in buildings and to im-prove indoor climate simultaneously. In this paper those methods are discussed. 2. POLLUTANT CONCENTRATIONS AND VENTI-LATION The basic steady-state equation (1) to calculate concen-trations pollutants in indoor air is simple and relates the generation of pollutant, ventilation rate and concentra-tion and outdoor air, other removal mechanisms than ventilation and ventilation efficiency vh h ohih