Wind speed characteristics in the centre of a city differthan the ones in its suburban. Street canyon effects result in weak airflows in the centre of highly dense citiesbecause of the combination of inertia and gravitationalforces. A huge experimental campaign took place in the centre of Athens in order to create a database of the main parameters that affect wind speed characteristics.Previous studies aimed to calculate wind speed in urban canyons by using deterministic techniques.

The integration of research outputs on the cross ventilation is tried in order to quantify the reduction of cooling energy, by raising the stepwise questions and by reviewingexisting knowledge useful to find solutions. Through the integration, it will be possible to estimate the sensitivity of errors of discharge coefficients and wind pressure coefficients on the cooling energy and to determine the necessary accuracy.

Regular air tightness and infiltration measurements were performed in forty houses, in the area of Attica, Greece. Two measurement methods were used, the tracer gas decay method and the Blower Door tests method. BlowerDoor measurements were done in accordance with EN ISO 13829 [1]. Ambient conditions and temperature fluctuations inside the houses were measured as well.A classification of houses examined, based on experimentsresults was acted out in accordance with EN ISO 13790 [2].

The present paper deals with the experimental analysis and monitoring of the energy and environmental performanceof a green roof system installed in two residences,in the region of Athens, Greece. The one is located in municipality of Psichico and the other in municipality of Peristeri. The analysis was carried out in two phases.During the first phase, monitoring of the green roof systemwas performed.

The purpose of ventilation is to dilute indoor contaminantsthat an occupant is exposed to. In a multi-zone environment such as a house, there will be different dilutionrates and different source strengths in every zone. Most US homes have central HVAC systems, which tend to mix conditions between zones.

One of the research areas of the Energy research Centreof the Netherlands (ECN) concerns the built environment.Several facilities to conduct research activitiesare at ECNs disposal. One of these facilities, are five research dwellings located on the premises of ECN. Measured data from these facilities together with weather data and computer models are used to evaluate innovative energy concepts and components in energy systems.

This study aims at examining the reduction of indoor air contaminants by plants placed in an indoor space.Field measurements were performed using Aglaonema brevispathum, which were verified as air-purifying plants by NASA.Two conditions for the amount of plant was used in two separate rooms whose dimensions are identical.

In summer 2007 a housing project will be build, reachablewithin 20 minutes by car from Granada. It contains33 single family houses , 21 apartements and 40 dwelling units social housing. The goal of this project is to achieve moderate temperatures withoutelectric equipement during most of the time. Energyuse achieves so called Passivhouse Standard.For this project we have to adapt cooled soil in weight and thickness. Hygrothermal simulations showed the possibility to evaporate under the roof insulation 200 g Water per day and sqm in this climate.

The primary aim of the EP label project was to develop a methodology for energy benchmarking and certification of buildings, based on Operational Ratings, to address the EPBD Article 7.3 requirement for Public Buildings over 1,000 m to display an Energy Performance Certificate.Within the EP label project, an easy-to-use yet robust system for building owners, occupiers and managers has been developed that produces a provisional energy performancecertificate in advance of national legislative requirements being finalised in each Member State.Energy assessment and certification have been appro

The aim of the Pythagoras project was the development of an innovative national training material in the sector of indoor environmental quality.The need for education in this specific sector is dictatedby the significant indoor environment deterioration and associated health hazards as these become evident through a series of studies and measurements carried out by the research team.