Linking artificial lighting with daylight requiresthe presence of controls and censors for eachroom. Apart from the energy saving producedthough, this can have significant initial cost implicationsfor the user. This paper presents amethod for linking artificial lighting with daylightover a whole building in real time, througha single sensor system.By placing a camera on the top of a building, itis possible to capture a digital image of the skyat regular intervals. Post processing that imagecan give us an accurate representation of the skyconditions at any given moment.

In this work, the heat island effect is studied forthe coastal town of Patras. For this purpose, aset of 13 data loggers, have been placed, in chosenrepresentative locations, to monitor ambientair temperature variations. Collected data arepresented for characteristic places. Results areextracted which indicate that heat island effectsare much less intense in comparison with otherinland towns.

In the framework of the European program of»Polis", an extensive network of 27 selfregistering stations, which were recording air temperatures inside the urban environment of the city of Athens for a time period of two years, from August 1996 until August

In urban areas, main air flows from prevailing winds are strongly modified, depending on constructions’ morphology and urban microclimate’s effects. The meteorological data on the wind speed are often available from outside city centres whereas this wind

In this paper we are introducing the first versionof COMFORT-EX, a computational tool, with afriendly interface, developed in Java languageand visible from any computer with an Internetbrowser. This tool pretends to assist architects,landscape architects and urban planners to determinethe correct design strategies to followfor a project in specific climate conditions. Italso helps to evaluate the thermal comfort sensation,and to make the pertinent corrections ifnecessary. A selected case study sited in thecampus of the University of Sonora, evaluatedwith COMFORT-EX, is described.

Art does never just copy nature. There existsalways a transcendental added value due to theintervention of the artist himself. In some formsof art, such as in painting or sculpture this ismore obvious. However, the more abstract andnon-figurative the form of art the less obviousthis becomes such as in the case of architectureand music where the starting points are not frommotives that already pre-exist.

The increase of living standards in buildings andhigh summer maximum air-temperature valuesduring the last years have increased the installationof A/C in buildings. Analysis of the summerambient temperatures is thus necessary toinvestigate the important impact on energy consumption.Ambient temperature data from theNational Observatory of Athens station for theperiod 1977 - 2004 are presented.

The Energy Performance of Buildings Directive(EPBD) lays down requirements as regards:- the general framework for a methodology ofcalculation of the integrated energy performanceof buildings;- the application of minimum requirements onthe energy performance of new buildings;- the application of minimum requirements onthe energy performance of large existingbuildings that are subject to major renovation;- energy performance certification of buildings;and- regular inspection of boilers and of airconditioningsystems in buildings and in additionan assessment of the heating installationin which

The performance of “hybrid controlled” trickle ventilators, that is background ventilators whose opening area depends upon both the pressure difference across the vent and the relative humidity of the room air, are investigated by means of computer simula

In this article the concept of a new energy-efficient office building and results of a 3-year monitoring are described. The monitoring was performed within the German funding pro-gramme EnOB [1]. In this building most of the offices are naturally ventilated and passively cooled. One aspect of the passive cooling is the nocturnal ventilation operated automatically by the buildings control system. Another focus of the energy concept is on regenerative heat-ing with wooden pellets.