A sample of existing double-skin faqade (DSF)buildings distributed across Europe were analysedby means of data clustering. Studied buildings arelocated in different European countsies and in orderto structure the results according to climateconditions, three main regions were proposed. Ingeneral, results have shown good energyperformance of DSF buildings. Annual energydelivered per square meter useful pavement areawere computed for each DSF building andcompared. Clusters of DSF office buildings withsimilar energy behaviour were established.

In this study, a durability assessment model forbuilding envelopes design based onhygrothesmal and wood rot decay analysis ispresented. The durability assessment model canquantitatively predict hygrothermal conditionswithin the building envelopes, and progress ofwood rot decay of timber frame under variableconditions. The followings are characteristicsof the durability assessment models in thisstudy.

The purpose of this paper is to proposestrategies of reducing energy consumption forcooling in residences under hot and humidclimate such as Indonesia. Based on the resultsof field survey, a simulation of the indoorthermal environment considering the operationof an air-conditioner was carried out, in order toevaluate energy consumption by theair-conditioner. This simulation program takesinto account both heat and moisture transportsin the walls. The effects of air tightness andthermal insulation were examined.

Energy efficient building means automaticallyextra attention to energy efficient ventilationand air tight building. At this moment there area number of new innovative domesticventilation systems in the market as analternative for the common MVHR systems.The types of systems range from advancednatural and hybrid systems to balanced hybridsystems. All these systems can combine a lowenergy consumption with a good indoor airquality and thermal comfort and guarantees onreliability and performance. A prerequisite forthis is a good design and especially a goodconstruction and commissioning.

The hygrothermal performance of houses isrecently being required to indicatequantitatively due to the encouragement ofenergy conservation. Several calculationmethods are practically proposed to evaluateenergy saving measures of houses. However,those methods do not take into account moisturetransfer in wall assemblies. Humiditycalculation is simply affected by ventilation andfocuses on just the building spaces.

There are many infiltration routes in detachedhouses in Japan. These routs lead chemicalcompounds into the indoor spaces from theconcealed spaces.In this study, the effects of countermeasureswith airtight methods and ventilation methodswere cleared using a simulation program. Atfirst, the equivalent leakage areas in theconcealed spaces were measured using cutmodels. Next, the movements of chemicalcompounds were calculated using thesimulation program: "Fresh2006".The results showed that the concentrations arelower in the improved houses than those in thecommon houses in some cases.

To obtain thermal comfort in a moderateclimate, dwellings were traditionally providedwith a heating system, but few had coolingsystems.

Wind speed correction based on the terraincharacteristics is commonly found in severalwind related applications in the builtenvironment. In some models based on powerlaw profile, the exponent (a) and a correctionfactor (1) are assumed for each tewain type.This paper aims to check the applicability ofone of these models for urban environmentswith high density. Experiments in a boundarylayer wind tunnel were performed for an urbanarea of 600 x 600 m, in the district of Moema,in the city of S5o Paulo, Brazil, using a modelwith 1:500 scale.

There are some ways to promote natural ventilation, but this research focuses on chimney which is traditional ventilation method used for industry or fireplace. The goal of this research is to establish the guidelines for the design of chimney for natural ventilation of rooms. This paper reports the result of the wind tunnel test to study airflow around building roof As a result of wind tunnel tests, some tendencies were obtained.

Recently, a law securing 0.7ACH ventilationrates was enacted in South Korea. As aconsequence, various ventilators have beeninstalled in apartments. Of the different types ofventilators that have been installed, naturalventilators are able to minimize energyconsumption and reduce environmental load byusing natural energy.