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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].

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.

Adverse health effects have been reported in indoor swimming pools. Contributing factors may include high air humidity encouraging microbial growth, ventilation,aerosols and volatile organic compounds, as well as microbiological and physico-chemical quality of water. These factors were analyzed in five indoor swimming pools, of which four were to be renovated in the near future and one was only two years old. In addition, technical investigation of building structures, ventilation system, and physical conditions indoors was conducted.

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.

The management of indoor air quality is accomplished by various types of complex mechanisms related to indoorenvironment and recently, an integrated solution applying state of art technology is being presented pertainingto the management of indoor air quality.Currently in Korea, an intelligent type certification programis developed and enforced.

This paper shows the analysis of ventilation impact in the energy behaviour in rural areas. Considering that a large percentage of housing production is self-built in this part of Mexico, the impact of this construction activityis very important. This concerns the thermal comfort of the occupants of this type of constructions, which has also effects in the microclimate of the region.Due to the specifically local economy and the social structures, the self-built contributes in 60 % of the wholeof production of housings.

This paper introduces research being carried out to support effective energy efficient design in Egypt. It is based on deriving results of multiple parametric simulationsof energy performance of office buildings in Cairo and Alexandria. This is used to examine how to optimisepotential by reference to peak summer and winter loads. The outputs will later be used to inform the developmentof a decision support tool based on graphical interpretation.

Energy saving and emissions reduction are both affectedby the energy efficiency of the built environment and the matching between the quality of the energy carrierand the quality of the required energy. To take into account qualitative aspects of energy leads to the introductionof the exergy concept. Heating and cooling of buildings require low valued energy, especially if low temperature heating systems and high temperature coolingsystems are used.

Many modern office buildings have highly glazed facades.Their energy efficiency and indoor climate is, however, being questioned. Therefore more and more of these buildings are being built with double skin facades,which can provide improvements: a thermal bufferzone, energy savings, wind protection with open windows, fire protection, aesthetics, solar preheating of ventilation air, sound protection, nocturnal cooling and a site for incorporation of PV cells.

The Energy Performance of Buildings Directive (EPBD) obligates EU member states to develop a reliablemethodology capable of calculating and certifying the energy performance (EP) of their building stock. In this paper, studies on a series of school buildings, based on Standard prEN15217:2005, consider the impact that a lack of transparency in the data gathering procedure might have on the repeatability of the EP grades. The resultsshowed that variations in EP grades ranging from 0.06 to 1.06 EP grades were possible.