The aim of that study was to pinpoint indoor environmental variables necessary for providing an assessment of the condition of indoor environment in homes . Data from three existing housing and health studies were used to conduct a component analysis. 14 components have been selected to form the basis for an indoor assessment to be used in environmental studies.

The study of the particle pollution in an office under two different ventilation modes is presented in this paper. The concept of perceived particle intensity has been applied to evaluate the particle pollution from copiers under mixing ventilation and displacement ventilation. For the particle concentration distribution , measurements of the different sizes of particles and a numerical simulation have been made. The results are presented.

A comparison is made of the performances of various heating, ventilation and air conditioning (HVAC) arrangements in eliminating pollutants in working environmemnts in Taiwan. The airflow of various simulation routes are evaluated. Simulation results are used to identify the vent arrangements for a ventilation efficiency.

For that study, field measurements of the indoor climate and ventilation performance have been carried out in Estonia in 28 lightweight timber-frame detached houses. Temperature and relative humidity were continuously measured for each house at 1 hour interval over 1 year period. Results and comments are presented.

The paper is a presentation of selected results obtained by questionnaires, measurements and simulations of ventilation processes in typical blocks of flat and office buildings in Silesia. The aim of this study is to present the investigations and to sum up the effects of airtightness and natural ventilation on indoor environment.

The objective of this paper is to expose the obtained results of ventilation efficiency in thetypical configurations of air extraction in residential buildings and, specifically, in the bathroomscases. Most representative typologies have been analyzed by means of a double study: an experimental model performed in laboratory with tracer gas and photo-acoustics techniques, and a numerical model with CFD software (Computational Fluid Dynamics).That stage, and the experimental validation of the numerical process, has allowed the infographicsimulation of a new and extensive cases variety.

We reflect the results and conclusions of a study on the air’s motion in four old Surgery Rooms in a Basque Country (Spain) hospital that were to be reformed. Our purpose was to understand the airflow trajectory in the surgery rooms, to detect the turbule

The passive cooling techniques such as night time cross ventilation is potentially an interesting strategy to provide substantial cooling energy savings in warm climates. Night cooling ventilation efficiency is determined by three main factors: the external air flow rate in the room, the flow pattern and the thermal mass distribution.

The utilization factor is a relative well-known concept used in some simplified calculationmethods as CEN EN-13790, in this regulation this factor depends on the thermal inertia and the ratioheat gains/ heat losses. In this paper we will define the utilization factor for cooling. The present paper starts analysing the energy stored and released in building components as walls. In this step we will establish a load period and a discharge period. In the load period the component will release heat cool load- while in the discharge period the component will storage heat cool discharge-.

The severe summer climate, the actual trends in building design (imported from northern latitudes) and the rising living standard in Mediterranean countries have promoted a massive and unnecessary use of air conditioning systems. This creates considerable problems at peak load times,
increasing the cost of electricity and disrupting the energy balance in those countries. Consequently,
the energy consumption for cooling of new and existing buildings will become a serious problem in the near future.