The research regarding the importance of indoorair quality is recently becoming issue fromKorea and various methods are being used toimprove interior air quality. Indoor aircontamination became an important issue as theamount of infiltration is diminished by tightlysealed envelopes, and the building materialsmade of chemical components are frequentlyused.

The results of a recent research and it'sstatistical analysis, show that in some of theIranian cities like YAZD, there are two periods(from end of august to end of September andfrom end of February to end of March) in whichoutdoor pollution is higher than other periods.School starting and industrial activities in thesummer could be the prime reasons of thisphenomenon.

Reinforcement of air-tightness and thermalinsulation in the indoors leads to the declinein air-change rate. Moreover, due toincreased chemical substances on furniture,the indoor air-quality becomes worse andmay induce various health problenls, namelythe condition known as the Sick BuildingSyndrome(SB S).Many tools and methods are being developedto improve indoor air-quality.

During the past half century, filtration techniques based on the use of activated carbons have been widely used in industrial applications, and considerable knowledge about the mass transfer processes involved has been developed. Surprisingly, the use of activated carbon filters in building applications has remained marginal, and one reason is probably the lack of information on the actual efficiency of such systems in realistic configurations of building operation.

A double-skin facade is installed in a laboratory full scale test cell. The double-skin fagade has a 20 cm wide air cavity with Venetian sun-shading blinds and is provided with mechanical ventilation. The experiments are performed in fully controlled conditions. The results are including temperature measurements in several locations in the faqade and test cell. Two main scenarios (summer and winter situation) are investigated. Under these scenarios different ventilation configurations with various operation strategies are implemented.

It is known that there are some methods ofenergy conservation for building facilities.Energy recovery ventilator (ERV),which canrecover sensible heat and latent heat, is one ofthe solution to reduce heatinglcooling loads,which are related to the power consumption ofair conditioning systems. Manufacturesspecify the performance of ERV'seffectiveness on the specification, however,there are few measured examples on energyeffectiveness in actual conditions in mildclimate area.

Today lots of research and application of solarheating are focused on continuously occupiedbuildings, such as residential buildings. Thispaper studies solar heating for intermittentlyoccupied buildings such as offices, classrooms,workshops which generally are unoccupiedduring nights and weekends. If we stop spaceheating during nights, energy for space heatingwill be reduced. In the paper, a simple buildingis assumed and a solar assisted space heatingsystem is designed for it.

The productivity of occupants in classroomsdepends strongly on the indoor air quality andthe thermal comfort. Three ventilation conceptswith different arrangements of supplyand exhaust openings are presented as solutionsin this study. The different ventilationconcepts which are mixing- and displacementventilation are evaluated by different criteriain particular by their ventilation efficiency.

In the recent years in Latvia is rapidlydeveloping construction sector of residentialbuildings. Engineers have to give moreattention to heating and cooling system'stechnology in the buildings to stay competitivein the realty's market. Every year is increasingpart of geothermal heat pump's use. Anincreasingly important econoinic factor and parameter in calculating the economic feasibility of geothermal heat pumps, is the extent to which a market exists for COz emissions in the country of operation.

This paper presents the energy savings thatcould be obtained by the appropriate design ofthe building in terms of morphology, thermalinertia and glazed area. Based on an extendeddatabase of values obtained by simulations, thisparametric study gives a new approach for thearchitects or design engineers as supportguidelines in the very first stage of their projectsin finding efficiently energetic solutions.One of the analyzed parameters is the buildingshape coefficient which is defined as the ratiobetween the volume of a built form and itsexternal heating losses area.