In surgical operating theatres the concentration of contaminants to a minumum level is compulsory so an optimum design of air conditioning is required along with careful control of flow and temperature characteristics to achieve sterile conditions. This paper aims at analysing the performance of the HVAC system design in an egyptian modern hospital.

The comparison of indoor temperatures measured in different Beijing buildings without air conditioners allowed those conclusions : the indoor temperature is different according to the floor at which a room is located , a high insulation of external walls and roof, along with a proper location of fenestrations and window shading can reduce incidence of solar radiations and improve indoor climates of the room.

For the protection of workers against the excessive radiation heat, local ventilation is used . But the distribution of locally supplied air has to be designed so as not to interfere with the production process. The design of a local air supply ( air shower) is based on operational measurements of thermal conditions realised on the working place of operators.
The analysis of the the operators'heat stress was made by using the WBGT-index (Wet Bulb Globe Temperature index)

The aim of that study was to follow up the performance of ventilation in 2 buildings for people with respiratory illnesses.

In this paper, the authors are proposing a concept of a radiant ceiling panel HVAC system integrated with ice storage system to cope with the following requirements : load leveling, energy saving, cost saving and thermal comfort. Series of measurements were carried out on six model office fixtures displayed in a room equipped with that concept of radiant ceiling panel.That system provided a good thermal environment which tallied with the Ashrae et ISO recommandations.The authors plan to introduce this system into real buildings.

In this paper, the normal ventilation system and the concept of all fresh air conditioning and ventilating system are presented. The 2 systems are then compared, with the use of a non-isothermal k-e turbulence model.Results show the wind velocity distribution , the temperature distribution and the Scale for Ventilation Efficiency distribution for each case.Their conclusion is that with the all-fresh air ventilation system, there is a high ventilation efficiency around the occupant zone.

The main aim of the Tip-Vent project was to provide a contribution o the creation of improved boundary conditions for the application of mechanical ventilation systems with good levels of performance. The project has led to a better understanding of the true performance of ventilation systems, why they perform as they do and what improvements are achievable. The Tip-Vent source book synthetises the findings of the projects participants.

This report summarizes the work of the initial working phase of IEA Annex 35 "Hybrid Ventilation in New and Retrofitted Office and Educational Buildings". It describes the state-of-the-art of hybrid ventilation technologies, of control strategioes and algorithms and of analysis methods. It provides examples of existing systems and show solutions to specific problems in 22 office and educational buildings locate in different outdoor climates.

In 1998, an international research project entitled "Hybrid Ventilation in New and Retrofitted Office and Educational Buildings" was commenced under the auspices of the International Energy Agency. The fourth forum organized within the framework of this project was held in May 2002 in Montreal, Canada. About 25 papers related to the major outcomes and technologies were presented.

This report presents the status of airborne biocontamination measurements in France in residential and commercial buildings.