English

In modern architecture glazed units have become a component whose diversified and complex functions shall often satisfy conflicting needs. The glazed element must be capable to modulate and control the radiant and luminous flux incoming into a room improving the quality of vision and living suitability. The task of this study is to highlight the limits of standards in evaluating glazing units, pointing the attention on the luminous and colorimetric parameters and their influence on people satisfaction and comfort.

The building system provides a solar energy passive contribution into a bio-climatic assembly. The heat carrier is the air. The solar radiation thermal conversion is made through the greenhouse effect. The air is diffused in the inner space naturally, due to pressure and temperature differences, without using mechanical means. There is a synergy, a cooperation of the assembly of building elements which, to this end, have multiple functions.

Active and passive solar strategies, together with measures of energy conservation and integration of new materials and technologies, can bring a meaningful energy saving in buildings. In particular, if combined with energy saving measures, the use of solar source can strongly reduce the demand of traditional energy sources. However, the use of such technologies is not sufficient if comfort demands of people who live or will live in the building are neglected and if the proposed technologies are not studied for their real suitability.

Radiative cooling systems by means of nocturnal longwave radiation have captured the attention of today’s specialists involved in the construction building process. While most of the systems incorporate a flat-plate radiator that utilizes water, the prese

A review of the solar water heating equations in the BRE Domestic Energy Model was carried out using data from a recent monitoring project. The savings predicted by the model did not match the test data well, so improved equations were devised. Predictions from the new method were then tested against the measured savings from monitored systems and found to match the test data much better.

This study has demonstrated that the microperforated duct is highly qualified if moderate requirements for the ventilation features and high standards for the absorption characteristic are concerned.In addition, the microperforated ducts allows for draft free ventilation concepts along with a reduction of the sound level of interior noise sources . Experimental evidence is provided in that study.

The author presents an example of ventilation for high-standing collective dwellings with a system that combines thermal comfort and healthy ventilation. It consists in picking air on the roof and dispatching it into the building with a vertical tubing. The air is filtered then pulsed by a fan and dispatched in the dwellings via horizontal tubes.
That system solves the acoustic problem too in so far as air is taken on the roof with no air entry on the facade.

The particle contamination is well mastered whereas the molecular and microbiological contaminations are not : the existing purifying systems generally use the trapping but not the destruction of the contaminants. CIAT company has developed the NEO system to destroy those contaminants : it consists in combination of adsorption on activated carbon with photocatalyst, the results of that coupling are encouraging.

The authors present the different techniques for the reduction of radon concentrations in buildings, mainly in individual buildings. Natural ventilation is one of the solutions, a second one is the depressurization of the ground and the last one is pressurization of the building with the use of mechanical ventilation. Each building is a specific case but operational solutions exist that have to be forecasted .

The main results of 3 studies on the measurment of the indoor air pollution are presented in this paper. The first article deals with NO2 concentrations in houses, the second one on passive tobacco nuisance that is widely spread and at important degrees and the last one on particle concentrations after the falling of the World Trade Center Towers in New York city. This paper shows the complexity of indoor air pollution phenomena.