This study is part of an ongoing investigation concerning an innovative technology for whole house ventilation. An experimental whole house low energy ventilation system has been installed in dwellings located in Denmark and Poland for tests and control. A CFD analysis and a simulation were made too. The results have been compared , the low values suggested by simulations and achieved by "air supply' windows have been confirmed by the monitored results.

That paper shows how a top-down precooled natural ventilation can be an effective and energy efficient technique for providing thermal and ventilation comfort in a wide range of modern buildings during high summer or in warm climates, when used properly.For that study, the top-down precooled natural ventilation of an occupied open-plan space is equipped with a high-level vent and a low-level vent . A chiller unit is connected to the high-level vent to provide precooling. A quantitative model has been developed and tested with analogue laboratory experiments. The results are presented.

In the airtightness testing industry, the upper limit for large buildings to be tested was 5000 m2. The feasibility of testing very large buildings, over 5000 m2, with a steady state fan technique has been questioned and the authors of that paper have tested and proved the technical feasibility of this equipment. The development, calibration and application of a 2 m diameter fan pressurissation system is demonstrated in this paper.

Experimental and theoretical investigations along with CFD modelling considerations are discussed in this paper to evaluate the performance of a square section wind catcher/tower turret system for natural ventilation.The modelling results tally with the experimental results at lower wind speeds. Wind catchers are innovative techniques, their performance greatly depends on wind conditions. They should be designed as an integral part of the design of the HVAC system in an hybrid or mixed mode operation.

Virus transmission through the vertical drainage stack is believed to have been one of the causes of SARS transmission in Amoy gardens, a high-rise residential housing estate in Hong Kong.The authors present their findings on the building drainage system, that include a review of the outbreak incident, the observations and site measurements of foul air and water back flow in the drainage system of another vacant site. The field studies with tracer gas measurements, confirmed the hypothesized infection route.

This paper describes an approach that has been undertaken to improve the airtightness of a number of plasterboard-lined load-bearing masonry dwellings that were constructed in the early 1970s. Such dwellings are likely to be broadly representative of many of the dwellings that will be refurbished in the UK over the next decade or so. The airtightness of the dwellings was improved by

A two-stage method is described in this paper. Its aim is to perform parametric and analytic studies of natural ventilation for summer cooling. For a strategic design of natural ventilation, that method is adequate, it is simple and straightforward. The demonstration is made of the use of that simplified method for the generation of detailed and robust data based on automatic and behavioural control models.

For this paper 40 studies based on the role of ventilation in airborne transmission of infectious agents in the built environment have been reviewed with two specific research questions :- Is there enough evidence to support that the ventilation and airflow pattern are the causes that contribute for the spread of airborne infectious diseases ?- If so , is there good evidence or data to support the specification and quantification of minimum ventilation requirements to minimize the transmission of airborne infectious deseases ?It appears a strong need for a multidisciplinary study that wo

In this study, the importance of moisture exchange for indoor climate and moisture conditions in permeable and hygroscopic structures by means of a all-year-round dynamic simulation along with measurements in a typical Finnish one-storey detached house with mechanical supply and exhaust ventilation
Their conclusion is tha permeable and hygroscopic strucutres can significantly reduce peak relative humidity (RH) values and daily changes in RH, but with a short term effect.

The objectives of that paper were to :Study the sensitivity and reliability of inhaled air temperature, humidity and gas concentration measurement by a breathing thermal manikinDevelop recommendations for use of breathing thermal manikins in practiceSuggest a method for predicting the quality of air as perceived by occupants, based on measurements performed by a breathing thermal manikin.In that aim results available in literature were analyzed first then experiments were carried out to study the performance of the thermal breathing manikin under different practical conditions.