In this paper, the proposition is to use free wind in order to create suction pressure within a ventilation duct with no consumption of commercial energy. The possibilities of this suction cylinder concept in a ventilation system are discussed. A CFD code was used for the simulation. The first results are promising

During renovation work of an old military building, the coal tar pitch that was used as a traditional water barrier, was left under the new carpeting. After the renovation, as office workers complained about bad and stuffy air, an AIAQ survey has been conducted . The VOCs were analyzed and determined by active sampling on TENAX TA sorbent, thermal desorption and gas chromatography. Most of the samples included the same volatile polycyclic aromatic hydrocarbons (PAHs) as the coal tar pitch did.

Air cleaning technologies for VOCs are not well established. One of them is (UVPCO) ultra-violet photocatalytic oxidation technology , practically studied only in laboratory settings, where relatively high concentrations of only few VOCs were employed.
This paper reports an experimental evaluation of the performance of UVPCO devices under real or simulated-real indoor conditions where many VOCs are present at low concentrations.

The main aim of the SOLANOVA project was to transfer the know-how of ultra low energy and passive houses to a sustainable retrofit of the huge stock of obsolete panel buildings in Eastern Europe. There were big controversies about the ventilation system to be adopted, the chosen soltin and justification are presented in this paper along with the first results.

A Task Ambient Conditioning (TAC) system has been adopted in a low-storey building of 20,000 m2 floor area in Tokyo suburb. That system, in conjunction with other design techniques such as double-skin glass and structural thermal storage system proved efficient to achieve comfortable personal work-environment with a reduced HVAC load.

Large spaces often have different usage requirements in the different parts of the room, and the ventilation system is rarely suited to obtain separate conditions in those spaces. In this paper various ways to obtain a virtual separation are discussed. Some promising results are obtained with CFD.

In that study sampling methods for airborne endotoxin are compared in order to find a standard method . The feasibility of liquid impingers and MOUDI (micro-orifice uniform deposit impactor) for airborne endotoxin collection was demontrated , then these methods were compared to the filter cassette sampling method and finally the performance of these sampling methods in variable realistic conditions was validated.

Ozone has direct, and adverse effects on human health. It can initiate reactions that may produce irritating products.The authors present the results of their study on the influence of the reactions ozone-limonene on the perceived air quality (PAQ) . Six different realistic concentrations of ozone and limonene, separately or together were tested in four identical and adjacent offices.

This study developed a CFD technique to investigate indoor airflow patterns combined with PM1, PM2.5, PM10 removal ability in ventilated multi-room buildings.The simulated results showed that coarse particles were easier to be removed out of the building than the fine ones and that indoor partitions increased particles deposition and decreased particle escape.

Finding an effective ventilation system that can contribute to minimizing the airborne transmission of infectious diseases in hospital wards at relatively lower cost was the aim of that study. The authors investigated the penetration of exhalation jets from a lying person and the distribution of exhaled droplet nuclei in a ward with three different ventilation systems (mixing, downward and displacement ventilation).