That study gives a snapshot of ventilation and IAQ in a small sample of a range of types of new homes built in England since 1995 . Simultaneous measurements of ventilation and IAQ are combined together with records of occupant behaviour and household characteristics.
The study was carried out in three stages :
Validation of a tracer gas method (PFT) for air exchange rate measurement
Study of indoor air quality (IAQ) and ventilation in homes
Detailed study in 5 homes, with a focus on short term peak concentrations of pollutants

This paper highlights some of the results of ECA report n° 23 that aimed at providing information and advice on strategies for achieving a good balance between good IAQ and the rational use of energy in buildings. The major strategies are : control of p

The objective of the study was to investigate the human response to five air terminal devices (ATD) for a personalized ventilation system (PVS). All the systems were tested in an experimental office, they all improved the perceived air quality at the workstation. The round movable panel was the ATD most preferred for the subjects, among the systems studied : it provided high perceived air quality and thermal comfort for subjects. The thermal environment created with all the systems was assessed as acceptable.

For that study, two types of air terminal devices for a personalized ventilation (PV) system in conjunction with either a mixing or a displacement total-volume ventilation system were installed in a mock-up of an office. The performances of those PV systems were studied in regard to inhaled air quality and thermal comfort as well as the transport of pollution within the occupied zone and between occupants.

That study about the development of new convection correlations for rooms with cooled ceiling (CC) panels has two main objectives : - to develop convection correlations for the CC surfaces in rooms with only natural ventilation. - to quantify the influence of the high aspiration diffuser on convection at cooled ceiling surfaces as well as at other wall and floor surfaces.

In the second part of this paper a simple two-way simulation method is implemented using CFD software to obtain the multiplicity behavior of laminar and turbulent indoor airflows in two-zone naturally ventilated buildings. The method used proved effective in detecting and isolating multiple solutions for different building geometries. The results and simulation data are expected to be useful for building ventilation design and smoke control engineering.

The first part of this paper is a presentation of a simple method using commercial CFD software to obtain the solution multiplicity characteristics of laminar and turbulent indoor airflows.A two-zone naturally ventilated building with four openings is considered in that study. Nonlinear dynamic behaviors are analyzed. Different flow modes were identified with the same physical and boundary conditions. A multi-zone airflow and thermal coupled program was also used to evaluate the results.That theroretical analysis can help to properly design natural ventilation in real buildings.

The aim of that study was to evaluate the environment's thermal conditions so as to indentify the comfort and localized discomfort conditions in office buildings with underfloor air supply systems.Parameters of thermal comfort and of system operation are presented in this paper. The results of that research show that thermal conditions created by the underfloor air supply system fulfill the thermal comfort requirements and can be used as a guideline for air-conditioning systems with underfloor air supply designs.

For that study 60 subjects in groups of six, were exposed for five hours to two levels of air pollution, four levels of absolute air humidity, and three air temperatures . These conditions were established simultaneously in two adjacent climate chambers (one with clean air, and the other with air polluted by carpet and linoleum). Nine objective medical tests of eye, nose and skin function were applied. The results and conclusion are presented.

For the removal of volatile organic compounds (VOCs), zeolites can be used. This paper deals with the removal performance of toluene in gas phase. A filtration system using zeolite at different ozone concentrations and moisture conditions has been investigated. The experimental results are presented.