Validation of CONTAMW predictions for tracer gas in a townhouse

To provide additional validation data for the multizone airflow and contaminant model, CONTAMW, experiments were performed in an occupied 3-story townhouse in Reston, VA. A tracer gas, sulfur hexaflouride (SF6), was manually injected within one room of the house and the concentration of SF6 was measured in each zone. This same process was then recreated in CONTAMW and the resulting predictions were statistically compared to the measured values. A total of 10 experiments were conducted and simulated between May 2000 and June 2001.

Exposure to environmental tobacco smoke in restaurants with separate ventilation systems for smoking and nonsmoking dining areas

The aim of this study is to compare the exposure to environmental tobacco smoke (ETS) of people in smoking and nonsmoking dining room. Levels of airborne pollutants and changes in urinary cotinine and nicotine levels were examined for 8 restaurants and 97 nonsmoking subjects (employees, patrons and referents).
Levels were significantly lower in the nonsmoking dining areas than in the smoking areas, and for the patrons than for the employees.

Indoor air quality and occupational exposures at a bus terminal

This article is a study of the air quality at a bus terminal. Presence and concentration of indoor air quality indices were determined by field surveys and sampling. Bus emission rates, occupational exposure and ventilation requirements to have a correct indoor air quality were simulated by mathematical model.
The results show that the natural ventilation rates are too low for having a good indoor air quality, and that pollutants emission varies with the temperature.

A pilot investigation into associations between indoor airborne fungal and non-biological particle concentrations in residential houses in Brisbane, Australia

In this study, associations between concentration levels of airborne particles and fungi were examined in 14 houses in Brisbane. No association was found between the fungal spore and submicrometer particles or PM2.5 concentration, but a weak link was found between fungal and supermicrometre particle concentrations : similarity in behaviour lies in the relation of the contaminant with the distance from the source.

Changes in airborne fungi from the outdoors to indoor air ; large HVAC systems in nonproblem buildings in two different climates

The changes in occurrence and the distribution of airborne fungi when they are transported in the airstream from the outdoor air to the indoor air are not well-known. For that study, fungal samples were tested in different locations in the HVAC systems with a six-stage Andersen Sampler with malt extract agar. The results showed that the fungal species changed according to those locations.

Fine PM measurements : personal and indoor air monitoring

This paper is a review of the techniques and equipment used during the last 20 years, to monitor Particulate Matter personal exposures, microenvironment concentrations and the constituants of sampled particulate matter.

Measurement and simulation of indoor air quality and energy consumption in two Shangaï office buildings with variable air volume systems

For that study, computer simulations and calculations of outdoor airflow rates and indoor air quality were made in parallel with site measurements in two Shanga office buildings equipped with typical Variable Air Volume systems.In addition to those site measurements, electrical consumption was recorded. Simulations and calculations of the electrical consumption and energy cost were performed.The site recorded data and the simulations results have been then compared and analyzed.

L'ambiomètre : un outil de mesure du confort d'ambiance dans les bureaux (The Ambiometer : a sensor for the ambient comfort in offices)

The ambiometer is a tool that allows both the recording of physical parameters of comfort and sensations of the occupant.The method developed is based on field investigations of four components of comfort : thermal, acoustic, visual and olfactory components : the experiment comfort parameters are recorded with the Ambiometer and the occupant gives his own feeling on each comfort parameter and on overall comfort.A database including those physical and perceptive parameters of comfort has been made, information was collected from about sixty offices.

Scale model study of airflow performance in a ceiling slot-ventilated enclosure : isothermal condition

The experimental investigation of airflow performance in a ceiling slot-ventilated enclosure under an isothermal condition was the aim of that study. Air-flow characteristics have been analyzed via experimental data then compared to literature theoretical expressions.
The results will be used in design guidelines of ventilation system for controlling indoor environment.

Material properties, room-climate measurements and building history - an interdisciplinary project to set the conditions of restoration and re-use for the fortress of Kufstein, Tyrol, Austria

For the restoration of the historic fortress of Kufstein, the high humidity problems encountered have required special investigations : the capillary water up-take characteristics of the wall stones and identification of the ventilation deficiencies have been studied.
Results show that a controlled ventilation system may help to reduce the problems associated with humidity and condensation.