In temperate continental climates, the reduction of the solar radiation influence in summer season, over the comfort conditions of internal spaces, can only be achieved by natural means in two ways: one possibility is through occupants adjustments of themselves (clothing,activity, metabolism) and the second possibility is through occupants control of the energy flows (heat, light, sound) in-out the building (management of the envelope).

Building industry is often regarded as a mature and traditionalsector, in which the technological development is not so accelerated as in other cases.The increasing costs for electric energy, heating and climatization,the dramatic environmental issues draw the attention of professionals and experts to those technologicalsolutions, components and devices which are going to represent the immediate future of engineering practices.The attention was drawn to a 16 900 m3 sport facility building with 800 seats to be built in the East sector of Rome, one of the districts in which is higher the need

This paper evaluates current situation of the university building which is considered oriented in the wrong direction,in the campus area of Izmir Institute of Technologyin Izmir, Turkey. The building, which houses the Faculty offices, is used by the Faculty of Architecture. Experience has indicated that cooling loads of the buildingare quite high, as it is oriented with the main design decision of facing the sea panorama along the long axis, lying in north-southerly direction, 11 from north to east.

Design guidelines for natural ventilation in buildings normally focus on the potential hourly air change (ACH) rates based on the building space parameters. Critically, external airflow design data is often assumed on the basis of a single mean wind speed and an associated prevailing wind direction. This can result in significant variation in ventilation rates and comfort conditions when non-design external wind conditions prevail.

This paper describes the possibility of high-temperature radiative cooling combined with natural ventilation. Weset uptwo small wooden experimental buildings:onehas a radiative-cooling system on the ceiling;and the other hasa conventional convective-cooling system.In the room with radiative cooling, we examinedthree patterns of cooling and ventilation: the first is radiative cooling withoutventilation; the second is radiative cooling with natural ventilation; and the third is no radiative cooling but natural ventilation.

Field survey on indoor air quality was conducted during winter season, in an elementary school at Kagoshima city. Asthe windows had been closed because of avoidingthe cold outdoor airIn thewinter,CO2 concen- trationsunder pupilsstaying in the classroom wereover1500 ppmat the end of the lesson. When the windows of the corridor facing outside had been open, the CO2 concentrations in corridor were close to the outdoor CO2 concentrations. It was found that the ventilation during the break could play an important role in CO2 concentrations during the next lesson.

The growing energy consumption for cooling of buildingsis one important concern in Mediterranean countries.Natural ventilation plays an important role as passive energy saving strategy, regarding cooling of buildings in this climate. Solar chimneys are some of the most useful systems that make use of this strategy. But optimised implementation and quantification of the improvements achieved by these systems are required and must be assisted by a comprehensive thermal characterisationof them. However the performance of solarchimneys depends on combined and very complex physical phenomena.

This study examines air quality measured in two classroomsin a UK school, which uses two different forms of natural ventilation, over an eight month period. The first classroom is an internal room that contains a top-down natural ventilation system known as a Windcatcher.The room also has a separate mechanical extract fan. The second classroom is ventilated using windows and doors that open to the outside. This study focuses on measuring the performance of a Windcatcher and reviews its potential to replace ventilation provided by conventional windows.

In Part 1, the changes in wind pressure coefficient distributionon the surfaces of the buildings when building coverage is varied are evaluated and identified, and it is elucidated that the ventilation through skylight is effectivebecause the surfacepressure can bekept negativeon roof surfaces even when building coverage is high.In Part 2, the results of numerical simulation (CFD) are compared with the experimental results.

In Korea, all residential buildings adopt floor- heating systems for indoor thermal comfort. And the ratio of multi-family houses exceeds 50%. Lately problems of noise between floors and contamination of indoor air in multi-family houses emerged as social issue, and performance standards related to noise between floors and ventilation were established in Housing Regulation. Concerning these issues, many systems have been developed.