A visual ventilation guiding device for instant estimation of indoor air quality has been developed for that study. The VVGD converts the signals of a gas sensor and a temperature and humidity sensor into an optical recommendation of how to act for the users (open or close the window). The device has been tested and calibrated in dwellings, flats and schools. Results and conclusions are presented.

This paper presents the EULEB project whose aim is to supply information to architects and engineers throughout Europe and beyond it. A CD containing information on architecture, energy consumption and economical efficiency as well as comfort of innovative buildings selected among educational buildings, office buildings and leisure facilities in nine European countries, will be produced. The lack of information on low energy architecture will be eliminated along with the prejudices many people have against it.

This article is part of the VENT DIS.COURSE project funded by the Intelligent Energy Europe programme whose aim was to improve energy efficiency in buildings by directly transferring existing knowledge. This paper discusses the relationship between design, commissioning and control of building ventilation systems to achieve an optimal balance of comfort and energy performance. Methodologies for short term studies are presented too.

This article is part of the VENT DIS.COURSE project funded by the Intelligent Energy Europe programme whose aim was to improve energy efficiency in buildings by directly transferring existing knowledge. This paper presents a brief summary of application of natural ventilation in urban areas to engineers. It focuses on the understanding of the energy impact of ventilation . It provides a simple guidance on calculating ventilation related energy losses for both heating and cooling conditions.

The new REHVA guidebook is presented in this paper. Written by an international group of experts. The researchers, engineers and practitioners advise how to quantify the effects of indoor environment on office work and how to integrate productivity in life-cycle-cost analysis of building services. The main purpose of their guidebook is to increase the awareness of building owners and practitioners to indoor environmental quality and its importance for office work and to convince them that large profits could be obtained with fairly small investments.

The aim of that paper was to evaluate the impact of different filter types on the performance of three typical packaged air conditioners under clean and fouled conditions. Simulated models have been developed, the fouling impact on equipment capacity and enery efficient ratio (EER) were analyzed along with dust transmission. Then conclusions and recommendations are listed.

The aim of the present study is to characterize, experimentally, the effect of dust loading on coil performance for HVAC applications when employing different filter-coil combinations. The results of experiments carried out on different combinations of five types of filters of varying efficiencies (MERV4, 6, 8, 11 and 14) and four types of evaporator coils with depths and fin geometries under clean and fouled conditions, are presented along with the conclusions of the authors.

Essential oils are one means to prevent microbial development, and are low in toxicity. The authors selected a pathogenic test strain and followed the Afnor NF T72-282 standard in the aim of proposing an indoor purification method based on the germicidal and odorant properties of essential oils. The protocol was both applied to one of the most active essential oils, mountain savory, and to a solution of formol, a chemical reference in hospitals.

The authors compared first the natural ventilation flows established by a range of heat source distributions at floor level, then demonstrated that modelling the ventilation flow driven by a uniformly distributed heat source is equivalent to the flow driven by a large number of localised sources. For the transient flow development in a room with a uniform heat distribution, a model has been developed then compared to existing ones for localised buoyancy inputs. Results are presented.

For that study, indoor and outdoor carbonyl concentrations have been measured simultaneously in 12 urban dwellings in Beijing, Shanghai, Guangzhou and Xi'an, during summer and winter. The most abundant indoor and outdoor carbonyl species found were formaldehyde, acetaldehyde and acetone. The dwellings with tobacco smoke, incense burning or poor ventilation had significant higher indoor concentrations of carbonyls. It appears too that the indoor levels of carbonyls are higher in Chinese dwellings than in other countries.