The new headquarters for Danish broadcasting company are planned for low energy use and minimization of CO2 emissions. Alternative energy sources are high priorities to achieve a healthy building with a pleasant indoor climate in terms of light, acoustics, thermal conditions and air quality. The combination of natural cooling and groundwater cooling with seasonal underground cold storage will save an estjmated 75 % of energy.

Night ventilation is a passive cooling technique that can reduce the cooling loads and energy requirements. In this paper , the use of a Multi Objective Genetic Algorithm optimization (MOGA) performed on a climatized part of a building with night ventilation proved to be a helpful tool for the analysis of problems where conflicting objectives have to be optimized simultaneously..

Field studies have been carried out in an existing kitchen to investigate the effects of gas stoves on indoor environment. Laboratory measurements were carried out according a similar process : Determination of filtration, Emission rate measuring, Determination of pollution loads, Thermal comfort measurements, Evaluation of local exhaust system. Results and conclusions are presented

A ventilation system effective to solve the SBS problems has been developed : it consists in a circulating ventilation system with air cleaning units that reduce indoor contaminant concentration without increasing the amount of air supply. The aim of that study is to determine the formaldehyde and VOC removal rates of that ventilation system. A constant-emission test in environmental chambers has been used for the experiments.

Photoacoustic spectroscopy (PAS) and the tracer gas techniques were used for the testing of indoor air quality and ventilation in nine Spanish office buildings during a 15 day period in May. Those experimental results have been analysed and conclusions are presented in this paper.

That study investigated the possibility of using a regenerative desiccant rotor for air purification.A laboratory study was carried out in a climate chamber, a dehumidifier with a silica gel desiccant rotor was installed within it to treat the recirculation airflow.A Proton-Transfer-Reaction - Mass Spectrometry (PTR-MS) gas analyzer was used for the measurement of VOCs concentration upstream and downstream of the desiccant rotor.The experiment confirmed that indoor humidity has little influence on the effectiveness of VOC removal by a desiccant rotor and that this technique is efficie

This paper points out the benefits of on-going testing of building materials. This allow to learn more about the decay or rise of building-related and occupant-related indoor air chemicals. Results, discussion and lessons learned from those product testing, source evaluation and air sampling are presented.

Measurements of physical, chemical and microbiological parameters were carried out in three classrooms of a school in Porto. They were conducted in winter, spring and summer twice a week. The results are presented. Low ventilation and high number of students per classroom are responsible for the high concentration of CO2.

This paper sums up the findings from three current analyses of BASE data. Using multivariate logistic regression models, the authors found increasing occupant symptoms associated with building related factors. The method, results and discussion are presented.

For that IAQ evaluation in a 75 storeys office building, the authors used three indicators (CO2, TVOC, PM10) to assist the building engineering management in the identification of possible improvement measures in indoor air quality control