Using a passive tracer gas technique, 1 and 2 week averages of local mean ages of air have beenestimated in an occupied detached single family house in mid-Sweden during one year. In this paperthe measurement result is compared with the result of transient simulation of ventilation using theCONTAM program. The simulation shows that the whole-house air change rate is dominated by theinfiltration due to mechanically created pressure difference as long as the outdoor temperaturedifference exceeds approx. 10 C.

A Simulation Program for Regional Energy and Environment Management (SPREEM) has beendeveloped for management throughout the life cycle from planning and design to operation of awide-area energy and environment whose core is DHC (district heating and cooling). Highoperability and easy understanding are required in SPREEM because its target users includedesigners and operations managers.SPREEM was developed as a simulation tool that executes calculation in Excel, and offers the highaccuracy required for management.

The growth of automobile population in Kuala Lumpur is an important issue for car parking spacesespecially commercial buildings. The large multi storey and underground car parks seem to offer goodsolution nowadays. Undeniably, indoor air quality (IAQ) is a vital element in the underground car park. Itis so important due to its effects to the human beings.

The purpose of studying vernacular Japanese architecture is to understand to what extent a house withlarge opening surfaces, no thermal insulation and very low environmental impact can become avaluable shelter during cold winters and hot humid summers. The reason of this result is to be found inthe strict relationship between the socio-cultural context and the environmental characteristics of thebuilding. The occupants behavior, the way of dressing, relaxing, living inside the house is acomplement of the thermal, daylight and solar performances of the envelope.

With radiant heating, it is possible to set room air temperature lower than when heating withair-conditioning because the human body is heated by a radiation. As room air temperature decreases,heat loss from walls and windows decreases, and so does the ventilation load. It is often said that theradiant heating, such as floor heating saves energy. This study calculates heat flow at the windows andthe walls of a living-room using computational fluid dynamics (CFD).

It is necessary to unsteadily accurately estimate handling and time-related spatial distribution of theindoor environment element in respect of externality meteorological phenomenon and time-varyingmovement of the heating and cooling load in order to carry out the thermal environment design in detail.With the speedup of the recent computer, the unsteady CFD calculation was practically carried out andresults fed back to the environmental design.However, time subtraction interval and convergence decision are appropriately set at the case of theunsteady analysis, and it is necessary to examine

Measurements of indoor pollutants have been performed in 50 residences in Athens. The concentration of CO2, CO, TVOC’s and PM2.5, PM10 has been measured. The ventilation rate in the dwellings has been calculated using continuous measurements of the CO2 co

Social, financial, energy and technical data from about 1110 households have been collected during2004 in the major Athens area. The sample has been divided in seven income groups and a detailedanalysis has been performed. Important conclusions have been drawn regarding the quality ofhouseholds, the operational conditions and the energy spent per income group. Low income people aremore likely to be living in old buildings with poor envelope conditions. The cost per person and unit areais much higher for the low income group for both heating and electricity.

The effectiveness of natural ventilation, i.e. its ability to ensure indoor air quality and passive cooling ina building, depends greatly on the design process.

The traditional house of Japan, Kominka, is constructed of wooden pillars and beams, and clay walls.The indoor space in the Kominka remains cool in summer because overhanging eaves block solarradiation and the open frame airs out. Technology to make small cracks airtight is undeveloped.Consequently, drafts enter the indoor space and chill occupants during winter. Improvements of indoorclimate have not been realized. This report describes "Yukis house," which is a Kominka built in thelatter 1700s, defined as a residence of the privileged class.